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Introduction
Publications
Publications (30)
This study employs axial compression testing to analyze the impact of mosaic patterns on the mechanical properties, specifically the strength and stiffness, of composite tubes. Three mosaic patterns (1/1, 2/1, and 3/1) and three winding angles (45°, 55°, and 75°) were selected for evaluation. Additionally, the acoustic emission (AE) technique was u...
Composite structures, especially pressure vessels, pipelines, and additional components such as tees, reductions, or inspection openings are more and more willingly used in the chemical industry. In this research, a novel design of a low-pressure composite vessel with an inspection opening is presented. The vessels are unsymmetrical considering the...
This article presents the results of numerical simulations of a structural system consisting of steel perforated thin-walled beams and a steel grating. The simulations were conducted using the finite element method. The analysis took into account physical and geometric nonlinearity as well as the contact between the steel grating and the beams. The...
Polyurethane (PU) has been used in a variety of industries during the past few years due to its exceptional qualities, including strong mechanical strength, good abrasion resistance, toughness, low-temperature flexibility, etc. More specifically, PU is easily "tailored" to satisfy particular requirements. There is a lot of potential for its use in...
Fire resistance is a major issue concerning composite materials for safe operation in many industrial sectors. The design process needs to meet safety requirements for buildings and vehicles, where the use of composites has increased. There are several solutions to increasing the flame resistance of polymeric materials, based on either chemical mod...
This paper presents the results of a study of polyurethane rigid (PUR) elastomers in terms of the constitutive law identification, and analyses the effect of polyurethane elastomers’ hardness on fatigue properties. The research objects were PUR materials based on 4,4′-diphenylmethane diisocyanate (MDI) with the hardness of 80 ShA and 90 ShA, typica...
An experimental and analytical approach to the relaxation problem of wood-based
materials—OSB (Oriented Strand Boards—pressed wood-based composite panels) beams, including beams with CFRP (Carbon fiber reinforced polymer) tape composite reinforcement, is presented. It is a relevant engineering and scientific problem due to the fact that wood and wo...
Microwave imaging and defectoscopy are promising techniques for dielectric composite evaluation. Their most significant advantage is their relatively high penetration depth. Another feature worth noting is that traditional methods could not acquire an internal content with such a low impact on both the sample and surrounding environment, including...
The paper presents the results of experimental research on polyurethane materials used in car suspension systems. Taking into account the frequency of maintenance and the number of replacement metal-rubber bushings on the market, the authors considered it reasonable to carry out their tests of materials with different hardnesses of 80 and 90 ShA us...
Although cooling at ambient temperature is widely used and is said to be safe and convenient, faster cooling may have an influence not only on the time of the manufacturing process but also on the mechanical response, especially the residual stress. The study aimed to investigate the influence of the cooling rate after curing on the mechanical resp...
This paper is focused on radial-compression of filament-wound composite pipes. An important but frequently disregarded is the issue of the choice of the winding pattern. The influence of the pattern on the strength of pipes is the subject of the investigation. Since the real geometry of filament-wound tubes is complicated researchers use simplified...
This paper is a short description of microwave non-destructive testing methods for composite material and presentation of a simple broadband microwave test method with an open-ended waveguide antenna for the purpose of non-destructive testing and quality evaluation of layered composite materials. Low-complexity experimental setup is shown. Research...
The growing interest in new materials - especially composite materials in the manufacturing and application of reinforcing bars in the building industry - leads to the development of the fatigue database for steel and composite materials. In the presented paper, Authors compare the fatigue endurance and failure
mechanism of two different rebars; st...
The paper deals with the subject of diagnostics and the quick repairs of long-term operated metallic materials. Special attention was paid to historical materials, where the structure (e.g., puddle iron) is different from modern structural steels. In such materials, the processes of microstructural degradation occur as a result of several decades o...
The paper presents the results of comparative strength tests on reinforced concrete beams with two different types of reinforcement. The test beams had glass-fibre-reinforced-polymer reinforcing bars with transversal stirrups, while the control beams used conventional streel reinforcement. Both groups were prepared with appropriate geometric parame...
The aim of the paper is to present a fatigue crack growth analysis thru a fractography study of different crack paths obtained in different operating conditions of the pressure vessel P355NL1 steel. All experiments were performed on CTS (Compact Tension Shear) specimens under the mixed mode (I+II) loading conditions. These stress states aim to refl...
The research was carried on specimens made of composite laminate with thermoplastic matrix PA6 reinforced with continuous glass fiber. Specimens were subjected to a static three- and four – point bending tests at different spacings of the supports, resulting in different values of the ratio between normal and shear stresses. Both distribution of no...
As part of the work, the possibilities of scientific cooperation between the Military Institute of Technical Engineering and the Wrocław University of Science Technology in the field of design, manufacture and testing of lightweight constructions were analysed. In the assumptions of cooperation, the key construction material is a polymer composite...
Purpose
The main idea of this paper was to observe an influence of different CFRP patches configuration strengthening, whose application to metals is very easy suppling significant elongation of service time. The next purpose of this paper was associated with the numerical calculation of the reduced stress intensity factor (SIF) range for strength...
Fatigue and fatigue crack growth are one of the most frequent causes of machine or construction failures. One of the successful strengthening method is the CFRP (Composite Fiber Reinforced Polymer) patching along the fatigue crack paths. An application of CFRP patches to reinforce long-term operated structures made of steel, evaluated in fatigue cr...
This chapter outlines part of the activities conducted within the context of the Integrated GAS powertrain (InGAS) collaborative project conducted within the context of the European Union 7th Framework Programme and coordinated by Centro Ricerche Fiat. It focuses on the design and physical realization of an advanced, on-board CNG storage system for...
This article outlines part of the activities conducted within the context of the InGAS “Integrated GAS
powertrain" (www.ingas-eu.org) collaborative project conducted within the context of the EU 7th Framework
Programme and coordinated by Centro Ricerche Fiat (CRF). The overall scope of this pre-competitive research project was the development of th...
Purpose: The investigations serve as comparative verification of silicone-aramid material designed for oesophageal prosthesis. Design/methodology/approach: In this work, non-standard research techniques, particularly designated for comparative tests of long-fibrous composite materials, are presented. Those tests are carried out on equipment similar...
In this paper application of integrated Optical Fiber Sensors for strain state monitoring of composite high pressure vessels is presented. The composite tanks find broad application in areas such as: automotive industry, aeronautics, rescue services, etc. In automotive application they are mainly used for gaseous fuels storage (like CNG or compress...
In the present work we demonstrate measurements obtained using optical fiber head sensors for high pressure composite vessel, composite strengthened concrete beam and the high-voltage composite insulator.
Advancing globalization in apparatus and plant construction is leading to ever higher demands being made in terms of efficiency and performance on the many various components and on complex piping elements in particular. These construction elements usually need to resist high internal pressures and temperatures as well as the influence of aggressiv...