# Krzysztof Murawski

Krzysztof Murawski

Dr inż. (PhD)

Working on the questions of "Stability of Structures" ...

## About

65

Publications

21,650

Reads

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376

Citations

Citations since 2017

Introduction

I ask all My Dear Followers They alternatively declare in the message to me that they will be joined to my lab and/or to which projects (at least one work is necessary) as my Dear Collaborators in accordance with Their scientific achievements and the rules described in the goals of the projects ...

Education

February 1997 - January 1999

October 1994 - October 1995

February 1986 - October 1987

## Publications

Publications (65)

Murawski (2017) described the theoretical model of an energy-absorbing bumper which protects vehicles from a crash. The first part described the question of passive safety as well as the classification, criteria of quality and the state of researches. In the next chapters the book presented the worked out method of projecting the layered bumper wit...

Murawski (2017) presented the theory of the technical loss of stability of slender columns under axially continuously load like columns loaded with self-weight in the elastic states. The differential equations of elastic lines of columns were determined. The formulas of the stability analysis and the critical parameters like critical specific gravi...

Murawski (2011) presented the theory of the technical loss of stability of rods which was developed on the basis of experimental results. The study considered cases of slender rods axially compressed by force with ball-and-socket joints without friction or compressed by force at the free end of the rod, while the second end of the rod was fixed. Th...

Murawski (2018) presented the theory of the technical loss of stability of columns, which was developed on the basis of the experimental results. The study considered cases of slender columns axially compressed by force with ball-and-socket joints or compressed by force at the free end of the column with the second end fixed. According to this theo...

The book describes the theoretical model of an energy-absorptive bumper which protects vehicles from a crash. The first part describes the question of passive safety as well as the classification, criteria of quality and the state of researches.
In the next chapters the book presents the worked out method of projecting the layered bumper with the...

Murawski (2023) continues and discusses the next case of the simplified method of the Technical Stability Theory (TSTh) of loss of stability of lateral buckling in elastic-plastic states of semi-slender columns axially compressed by a force. It is again assumed that in the critical elastic-plastic transverse cross-section there are the elastic and...

The paper presents and discusses the simplified method based on the Technical Stability Theory (TSTh) of loss of stability of lateral buckling in elastic-plastic states of semi-slender columns axially compressed by a force. It is assumed that in the critical elastic-plastic transverse cross-section there are the elastic and plastic parts of the are...

Dear Dr. Krzysztof Murawski,
Thank you for your help and support to maintain the high peer review standard of this journal. Kindly find herewith the certificate of reviewing. We again thank you for your great help.
One line of acknowledgment will be highly appreciable.
With regards,
Dr. Basu
Journal editorial office
Reg. Offices:
India: Guest House...

In this study, a Finite Element Method (FEM) analysis is presented for the loss of stability in elastic states of very slender pinned without friction box-section thin-walled column axially compressed. From the FEM buckling linear stress analyses are determined the compressing critical forces for 36 cases, presented in tables and as the surface fun...

The paper presents the comparison of experimental results obtained from tests on semi-slender columns with pinned ends made of steel R35 to simplifications and hypotheses of loss of stability by lateral buckling in elastic-plastic states of columns axially compressed by force. The Tetmajer-Jasiński's and Johnson-Ostenfeld's simplifications, as well...

Murawski (2021) presents and discusses two simplified methods based on the Technical Stability Theory (TSTh) of loss of stability of lateral buckling in elastic-plastic states of semi-slender columns axially compressed by force. It is assumed that in the critical elastic-plastic transverse cross-section there are the elastic and plastic parts of th...

The stability of load-bearing members is a challenging issue for designers. The avoidance of possible stability troubles is a mandatory step of the overall design process. The paper presents and discusses two simplified methods based on the Technical Stability Theory (TSTh) of loss of stability of lateral buckling in elastic-plastic states of semi-...

Propose: Investigation of mathematical solutions for including the self-weight of a column for calculating buckling critical load. The complexity of including self-weight resides in the fact that the mathematical formulation depends on elliptical integral solutions related to diferential equations of the problem.
Method: Comparing the analytical s...

The stability of load-bearing members, as known, is a challenging issue and several tools are available for designers. Disregarding the material properties in use, the avoidance of possible stability troubles is a mandatory and challenging step of the overall design process. Murawski (2020) presented a theoretical model for the loss of stability in...

Murawski (2020) studied the simplifications and hypotheses of loss of stability by lateral buckling in elastic-plastic states of semi-slender columns axially compressed by force. The Tetmajer-Jasiński’s and Johnson-Ostenfeld’s simplifications, as well as Engesser-Kármán-Shanley’s, Ylinen, Březina, Pearson-Bleich-Vol’mir’s, and author’s approximated...

The paper presents the comparison of experimental results obtained from tests on semi-slender columns with pinned ends made of steel R35 to simplifications and hypotheses of loss of stability by lateral buckling in elastic-plastic states of columns axially compressed by force. The Tetmajer-Jasiński's and Johnson-Ostenfeld's simplifications, as well...

Murawski (2020) presented the simplifications and hypotheses of loss of stability by lateral buckling in elastic-plastic states of semi-slender columns axially compressed by force. The Tetmajer-Jasiński's and Johnson-Ostenfeld's simplifications, as well as Engesser-Kármán-Shanley's, Ylinen, Březina, Pearson-Bleich-Vol'mir's and author's approximate...

Murawski (2019) presented the theory of loss of stability in elastic states of a very slender rectangular shell axially compressed by force through ball-and-socket joints. According to the theory, a loss of carrying capacity of a slender rod in elastic states occurred when a line of force left a critical transverse cross-section of a column. The cr...

Folding of the thin-walled aluminum tube in plastic states .

The certificate of the membership of the editorial council of the Publishing House of International Mariinskaya Academy n.a. M.D. Shapovalenko and membership of the editorial board of the scientific journal "Mariinskaya Academy"

Murawski (2011) studied according to own technical theory cases of slender rods axially compressed by force with ball-and-socket joints without friction or compressed by force at the free end of the rod, while the second end of the rod was fixed. The elastic-plastic and elastic states of rods were taken under consideration. According to the technic...

Critical stress of squat cylindrical and square shaped plywood tube compressed by ball-and-socket joints according to the Johnson-Ostenfeld hypothesis. The determining of critical forces according to the Johnson-Ostenfeld theory of axially compressed squat cylindrical and square shaped plywood stability is presented in the paper. The received theor...

Critical stress of squat cylindrical and square shaped plywood elements made of birch compressed by ball-and-socket joints according to the Engesser-Kármán-Shanley's modified hypothesis. The determining of critical forces, according to the Engesser-Karman-Shanley's modified stability hypothesis of axially compressed squat cylindrical and square sha...

Critical stress of squat cylindrical and square shaped plywood tube compressed by ball-and-socket joints, according to the Tetmajer-Jasiński hypothesis. The determining of critical forces, according to the Tetmajer-Jasiński theory of axially compressed squat cylindrical and square shaped plywood stability is presented in the paper. The received the...

Finite Element Method Analysis of stability in elastic states of very slender cylindrical shaped plywood tube compressed by ball-and-socket joints while the force line is getting out the critical cross section. The stability analysis of axially compressed cylindrical shaped plywood with the computer program "ALGOR" based on Finite Element Method is...

Experimental determining of extensions during test of stability of the rode 870xφ12 mm made of pine compressed by ball-and-socket joints. The description of the experimental test of stability with measurement the extensions of the generating lines in the critical cross section of the rode 870xφ12 mm made of pine compressed by ball-and-socket joints...

Stability analysis in elastic states of very slender square shaped plywood tube with core compressed by ball-and-socket joints. The theory of stability of the axially compressed by ball-and-socket joints very slender tube made of birch plywood with the square transverse cross section and with a foam core is presented in the paper. The differential...

Modified Mahold's belt pulley as the example of using of patented shaped plywood The belt pulley with the tubes made as the patented shaped plywood is described in the paper. The example of the belt pulley considered in this paper consist of the two tubes with thickness 10 mm and eight shaped elements with thickness 5 mm-all made of birch plywood....

Cable drum tube as the example of using of patented shaped plywood. The cable drum with the tube made as the patented shaped plywood is described in the paper. The example of the drum considered in this paper consist of the tube and two wheels made of birch plywood with thickness 5 mm. The length of the reeled up the cable on the drum is evaluated...

Stability analysis in elastic states of very slender column made of birch with square cross section compressed by balls. The base of the theory of stability of an axially compressed prismatic column with the square transverse cross section, made of birch, is presented in the paper. The differential equation of the elastic line, its slope and the cr...

Stability analysis in elastic states of compressed very slender square shaped plywood tube fixed by one end. The theory of axially compressed square shaped plywood tube stability is presented in the paper. The differential equation of the elastic line and its slope and the critical stress of very slender plywood tube in elastic states are considere...

Stresses and strains analysis in elastic states of very slender column with square cross section compressed by balls. The determining the stresses and strains in an axially compressed column with square cross section are presented in the paper. The stresses and strains are considered under the conditions of the flat cross-sections and little slopes...

https://grab.uprp.pl/PrzedmiotyChronione/Strony%20witryny/Wyszukiwanie%20proste.aspx

Stresses and strains analysis in elastic states of very slender square shaped plywood compressed by balls. The problems of determining stresses and strains in an axially compressed square shaped plywood shell are presented in the paper. The problems are considered in the paper under conditions of flat cross-sections planes and little slopes of the...

Finite Element Method postbuckling analysis of stresses and strains in elastic states of very slender cylindrical shaped plywood compressed by balls. The stresses and strains analysis of axially compressed cylindrical shaped plywood element with computer program "ALGOR" ® based on Finite Element Method is presented in the paper. The postbuckling st...

Stability analysis in elastic states of very slender square shaped plywood tube compressed by balls The theory of an axially compressed square shaped plywood tube stability is presented in the paper. The differential equation of the elastic line and its slope and the critical stress of very slender square shaped plywood tube in an elastic states ar...

Finite Element Method Analysis of stability in elastic states of very slender cylindrical shaped plywood compressed by balls The stability analysis of axially compressed cylindrical shaped plywood made with computer program "ALGOR" based on Finite Element Method is presented in the paper. The critical stresses of very slender plywood tubes made of...

The study presents the description of the loss of stability in elastic states of axially compressed square thin-walled columns. The differential equation of the elastic line and its slope, the critical stress, the shell stresses and strains of very slender tubes in elastic states under conditions of flat cross-sections planes and little slopes of t...

https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=6&ND=3&adjacent=true&locale=en_EP&FT=D&date=20040308&CC=PL&NR=355695A1&KC=A1#

https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=7&ND=3&adjacent=true&locale=en_EP&FT=D&date=20040126&CC=PL&NR=355137A1&KC=A1#

The description of the folding phenomenon of thin-walled cylindrical axially compressed rods during loss of stability in plastic states is presented in the paper. The course of quasi-static load and rod deformation thanks to simultaneous camera filming with the divided screen method is analysed. Changes of crystal grains in a polished cross-section...

Murawski K., 2004. Stability analysis in elastic states of very slender rods fixed by one end with stresses and strains analysis as exemplified by cylindrical shaped plywood made of birch, Acta Scientiarum Polonorum, Silvarum Colendarum Ratio et Industria Lignaria 3 (1)/2004, ISSN 1644-0722, 85-95 Abstract: The theory of the stability of an axially...

The study presents the description of the loss of stability in elastic states of axially compressed cylindrical shell. The author analysed the differential equation of the deflection curve and its slope, the critical stress, the shell stresses and strains of very slender tubes in elastic states under conditions of flat cross-sections and little slo...

https://pl.espacenet.com/publicationDetails/biblio?FT=D&date=20100331&DB=pl.espacenet.com&locale=pl_PL&CC=PL&NR=205172B1&KC=B1&ND=2#

https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=9&ND=3&adjacent=true&locale=en_EP&FT=D&date=20031006&CC=PL&NR=353223A1&KC=A1#

The bases of the theory of layered (shell with core) axially crushed cylindrical plywood shape stability in elastic-plastic is presented in the paper. The obtained theoretical results are related to the slenderness ratio of cylindrical shape.

Acta Scientiarum Polonorum. Architectura 2(1) 2003, 107-121.
The study presents the description of the loss of stability and problems associated with the determination of energy-consumption in plastic states of thickset, thin-walled and sandwich, cylindrical axially crushed rods. The author analysed the course of rod deformation depending on the a...

Stability analysis in elastic states of very slender cylindrical shaped plywood compressed by balls. The theory of axially compressed cylindrical shaped plywood stability is presented in the paper. The differential equation of the elastic line and its slope and the critical stress of very slender plywood tube in elastic states are considered in the...

Stresses and strains analysis in elastic states of very slender cylindrical shaped plywood compressed by balls. The problems of determining stresses and strains in an axially compressed cylindrical shaped plywood shell are presented in the paper. The problems are considered in the paper under conditions of flat cross-sections planes and little slop...

The study presents the basis of the theory of layered axially compressed cylindrical rods (shells with a core). The author analysed problems of critical loads in elasto-plastic states. The plasticity ratio of a critical transverse section was defined by the angle α , and was related to the slenderness ratio of rods. The obtained theoretical results...

The Engesser-Shanlay modified theory for thin-walled axially crushed cylindrical columns for the case when columns are made of plywood (patent application P.353556) is presented in the paper. The problems of critical loads in elastic-plastic states is considered. The squeeze ratio of critical transverse section is defined by an α-angle, which to sl...

"The Engesser-Shanley Modified Theory of Stability of Thin-Walled Cylindrical Rods with Example of Use for Steel St35, Acta Scientiarum Polonorum, Architectura, 1-2 (1-2)/2002, ISSN 1644-0633, 85-95". The Engesser-Shanlay modified theory of thin-walled axially crushed cylindrical rods is presented in the paper. The problems of critical loads in ela...

Simulation with Finite Element Method of Loosing Stability Phenomenon of Cylindrical Shell.
Results of comparative researches in inelastic states, experimental and with Finite Element Method, of a loosing stability phenomenon during axial crushing, of cylindrical thin-walled tube, is presented in the paper.
For experimental research was used as th...

Basics of Designing an Energy-consuming Bumper. Basic criteria of evaluation, conception of the work and algorithm of the dynamic analysis for designing the energy-consuming bumper as well as the example of a structure with the graph of hypothetical work of bumper protecting a vehicle with 1500 kg are presented in the paper.

Problematyka rozprawy jest związana z ochroną pojazdów przed skutkami zderzeń za pomocą zderzaków energoabsorpcyjnych. Po wprowadzeniu w zagadnienia bezpieczeństwa biernego pojazdów oraz klasyfikację, kryteria jakości i stan badań sformułowano cel pracy, tj. opracowanie metody projektowania warstwowych zderzaków i metod analizy procesów pochłaniani...

ABOUT A CERTAIN CONCEPTION OF ENERGY-CONSUMING CAR BUMPER
In this paper, a general conception of an energy absorbing car bumper designed as a sandwich structure has been presented. The bumper has been constructed as a beam with a variable stiffness and supported by the cantilever bars. Sandwich brackets have been selected to undergo to a full plas...

The question of critical loads in elastic-plastic states was considerate in the paper. The Engesser-Shanlay’s modified theory of thin-walled tubes under axially load was presented.
The plasticity ratio was defined by the angle of plasticized part of the critical transverse cross-section and related to the slenderness ratio. The theoretical values...

The question of critical loads in plastic states was considerate in the paper. The hypothesis of the way of displacement of thin-walled tubes under axially load was presented. On the base of this hypothesis the theoretical work of crushing was determined. The theoretical values of consumed energy to the experimental research results were compared....

Model researches of suspensions of a track car.
In the paper are presented the results from the simple computer program (written in the gwBasic, consisting of 3 units: the preprocessor - receiving the data, the processor - integrating numerically and the postprocessor - drawing the graphs for chosen parameters).
The program analyzed oscillation o...

EXPERIMENTAL DESIGNATION OF TANGENTIAL MODULUS FOR COMPRESSED SANDWICH TUBES Test results of the critical compressive stresses for hollow and sandwich tubes have been presented in the paper. Basing on the test results the tangent modulus in dependence on the slenderness ratio has been calculated. The obtained results have been compared to the tange...

"Model Researches of Truck Cabin Suspensions". Model researches of suspensions of a track car. In the paper are presented the results from the simple computer program (written in the gwBasic, consisting of 3 units: the preprocessor - receiving the data, the processor - integrating numerically and the postprocessor - drawing the graphs for chosen pa...

## Questions

Questions (7)

What do You think, Dear Collaborators, about scientific periodic e.g. "Stability of Structures" ?

Would it be helpful for us to publish our papers ?

How many of us would be willing to take duty as a board member or referee ?

So periodic should be as a part of RSGate, or should have its own web address , or should be a part of any university publishing house ?

What do You think about it, Dear Collaborators ?

Yours faithfully

Krzysztof Murawski

... the paper is titled: "Evaluation of mathematical solutions for the determination of buckling of columns under self-weight " ... ,

... so maybe somebody from our Project "Stability of structure under its own weight" wants to help us and give his opinion ...

We would be grateful ... , and maybe the next paper we would write together ...

best regards

K Murawski

OBS.: Authors may suggest up to four potential reviewers from different countries and different universities. Each reviewer's academic/professional position, scientific expertise, full affiliation and email address should be provided. The suggested reviewers should not be affiliated to the same university/institution as any of the authors.

Which assumption of the loss of carrying capacity of the axially compressed column in an elastic state is better: an appearing of a critical force (Euler's), or an exit a force line from a critical transverse cross-section (tech. stability theory) ?

Which describing of displacement of an axis of the column is better:

(1) as a part of a sine curve and the boundary conditions - like in the Euler's theory,

or

(2) as determined by the formula of the radius of a curve (1/ro=d2y/dx2) and the boundary conditions - like in the technical stability theory,

... and why ?

What is a system of an academic carrier in Your country ... ? , and which is better ... ?

I have heard about two basic known systems of the academic carrier:

1. "Parisian" - throw grades like: assistant, adjunct, professor of the university, titled professor ... , and You may get throw them in the same university (in the same building, in the same room, at the same desk ...) depending on opinions of Your supervisors,

2. "Bolognian" - only two grades: post-doc and professor of the university ... , but after a period (e.g. 4 years) every academic is fired and must take a part in a competition to be employed again (in the same or another university).

What is the role of a good/bad author law and patent law in the academic carrier ... ? , ... especially in those above systems ...

How do You think ... ?

I had noted that a few of my papers and books haven't got published references in the ResearchGate, what cause that cites are not visible for the cited authors in the ResearchGate, i.e. the cites are not "accepted" by the ResearchGate.

I am afraid that it limits my cooperation with other authors in the ResearchGate.

I have noted that in a few papers and books of other authors, there is the same situation …

What is the reason of those limitations ? , ... too many references in 1-2 pages paper ... ? , or in a few pages book ? , ... only a few papers in researches of an author ... ? , ... paper or book published in unknown publishing house ... ? , ... an unknown university or institute the author works, or he is independent ...? , ... a country in which the author lives ... ?

What could be the reasons ... ? , ... how do You think ... ?

## Projects

Projects (19)

The conceptual design of composite sections is concerned with the selection of selective composite materials systems to meet structural load requirements as well as the proper implementation.

Goal: All Dear Colleagues – Collaborators and Their Laboratories are invited to attach to this project Their old, new, and future works or messages about any type of "Stability of Beams, Frames, and Trusses", i.e. elements, often thin-walled, losing their stability when are loaded not axially (like columns) but in a transverse plane to the elements' axes ...
... if any RSGate Member wants to be added to the project as the Collaborator (at least a co/authorship of one work about the "Stability of Beams, Frames and Trusses" would be required), He needs to be a follower of a member ... , sorry ... , but in another way, the system of the project doesn't recognize Him, and He can't be added ... ,
... if any Dear Colleague–Collaborator of the project wants to add other Colleagues, which work on the "Stability of Beams, Frames and Trusses" (at least the co/authorship of one work about the "Stability of Beams" would be required) ... - don't hesitate to invite them ...
The main rules of our Project are as follows:
1. every Colleague–Collaborator of our Project should attach at least 1 work about "Stability of Beams, Frames, and Trusses" or a message about it,
2. every Colleague–Collaborator of our Project should follow each other,
3. every Colleague–Collaborator of our Project should read and recommend, if only would be so possibility regarding a scientific level of researches, all works with each other,
4. every Colleague–Collaborator of our Project should comment works to each other if only would be a reason to do that - comments naturally may be critical but with respect to authors,
5. every Colleague–Collaborator of our Project should cite each other - if only would be so possibility regarding research works of each one, i.e. in every new work attached to our Project should be cited a big number, e.g. 100 works of Collaborators of our Project,
6. every Colleague–Collaborator of our Project should collaborate and write common (with the Collaborators as co-authors) papers, books, ... and other kinds of works, if only would be so possibility,
7. if any Colleague–Collaborator of our Project has a possibility to help to publish works (e.g. as a member of a scientific journal or publishing house editorial board) should give massage about it in the "goal of the project" or in "updates" in our Project,
8. if any Colleague–Collaborator knows about a conference with "Stability of Beams, Frames, and Trusses" as a panel or topic - He should inform us in the "goal of the project" or in "updates" in our Project ...
I hope that the above rules of our Project would help us to get success in our scientific work ... , every one of us would like that His work would be noted, read, recommended, commented, discussed and cited ... , but somebody should do that ...
All Dear Colleagues – Collaborators are invited to be added to the Stability of Structures’s Lab regarding the rules of the Lab:
https://www.researchgate.net/lab/Stability-of-Structuress-Lab-Krzysztof-Murawski
Faithfully Yours
Krzysztof Murawski

All Dear Colleagues–Collaborators and Their Laboratories are invited to attach to this project Their old, new, and future works or messages about the stability of plates, shells (cylindrical, spheral, conical, et cetera ... shells), and panels made of metals, composites, concrete, bricks (masonry), wood, et cetera ... in elastic, elastic-plastic and plastic states ...
... if any RSGate Member wants to be added to the project as the Collaborator (at least a co/authorship of one work about the "Stability of Plates" would be required), He needs to be a follower of a member ... , sorry ... , but in another way, the system of the project doesn't recognize Him, and He can't be added ... ,
... if any Dear Colleague–Collaborator of the Project wants to add other Colleagues, which work on the stability (at least the co/authorship of one work about the "Stability of Plates" would be required) ... - don't hesitate to invite them ...
The main rules of our Project are as follows:
1. every Colleague–Collaborator of our Project should attach at least 1 work about "Stability of Plates" or a message about it,
2. every Colleague–Collaborator of our Project should follow each other,
3. every Colleague–Collaborator of our Project should read and recommend, if only would be so possibility regarding a scientific level of researches, all works with each other,
4. every Colleague–Collaborator of our Project should comment works to each other if only would be a reason to do that - comments naturally may be critical but with respect to authors,
5. every Colleague–Collaborator of our Project should cite each other - if only would be so possibility regarding research works of each one, i.e. in every new work attached to our Project should be cited a big number, e.g. 100 works of Collaborators of our Project,
6. every Colleague–Collaborator of our Project should collaborate and write common (with the Collaborators as co-authors) papers, books, ... and other kinds of works, if only would be so possibility,
7. if any Colleague–Collaborator of our Project has a possibility to help to publish works (e.g. as a member of a scientific journal or publishing house editorial board) should give massage about it in the "goal of the project" or in "updates" in our Project,
8. if any Colleague–Collaborator knows about a conference with "Stability of Plates" as a panel or topic - He should inform us in the "goal of the project" or in "updates" in our Project ...
I hope that the above rules of our Project would help us to get success in our scientific work ... , every one of us would like that His work would be noted, read, recommended, commented, discussed, and cited ... , but somebody should do that ...
All Dear Colleagues – Collaborators are invited to be added to the Stability of Structures’s Lab regarding the rules of the Lab:
https://www.researchgate.net/lab/Stability-of-Structuress-Lab-Krzysztof-Murawski
Faithfully Yours
Krzysztof Murawski