Questions related to Mechanical Processes
Dear all, i try to modeling a gear and pinion in Abaqus/standard to analysis the contact stress. I defined the reference point in the center of each gear and assigned the kinematic coupling constraint for both of them.
The displacement/rotation (B.c) was defined for reference points and moment load allocated to pinion. the surface to surface contact was assigned to gear and pinion teeth.
the analysis is aborted with these errors
I was wondering if anyone can help me to get over these errors
[Whenever a translation (rotation) dof at a node is constrained by a kinematic coupling definition the translation (rotation) dofs for that node cannot be included in any other constraint including mpcs, rigid bodies, etc.]
[MPCS (EXTERNAL or INTERNAL, including those generated from rigid body definitions), KINEMATIC COUPLINGS, AND/OR EQUATIONS WILL ACTIVATE ADDITIONAL DEGREES OF FREEDOM]
[2 elements are distorted. Either the isoparametric angles are out of the suggested limits or the triangular or tetrahedral quality measure is bad. The elements have been identified in element set WarnElemDistorted.]
[Displacement increment for contact is too big.]
[Excessive distortion at a total of 364 integration points in solid (continuum) elements]
I'm currently checking some cuts of welded plastics parts and I come across with ImageJ. I'm really new using it. If I save the image (or the stack of images) the measurements does not appear on my pictures. Is there a way to fix this?
Before you say it, I notice that there is an option to save the pictures on the Plugins/Utilities tab but if I have plenty of samples it will be a tedious way to do it.
Thanks in advance for your help
After the elaboration of different alloys; for instance FeNi i can't really get the appropriate composition of each single element 'EDS gave me a confused compositions. Different from what i have mixed initially at the begining of mechanical process. Thank you for answering
I have several pathways and want to know the biological process and metabolism related to each pathway.
Is there any database to search them?
For example I want to know the DRUG METABOLISM CYTOCHROME P450 pathway involved in what biological mechanisms or process?
Among different intrinsic factors which help microbial growth on a particular food, one is the redox potential of food. Can anyone explain me the basic mechanism of this process.
Is it possible that iron based precipitates in combination to al and si may form in al-mg-si alloys (specially in AA 6061-T6) as a result of some mechanical processing like welding or forming.The question why arises is that most of the literature regarding the formation of 2nd phase particles in Al-Mg-Si alloys like AA 6061-6 reported to observe mostly Mg2si particles. But few of my samples of friction stir welded AA 6061-T6 is showing 10-16 % of iron including al ,mg, and si (mg very less) under EDS analysis in BSE mode.
After You inject your DNA sequence into the distal gonad region using the microinjection, what happens to the DNA? Is it taken up by the germ line nuclei during the developmeant of the oocyte? If so what is the mechanism of this process? eAll of the literature seems to be lacking any details of how the DNA is actually expressed. It just talks about finding the DNA incorperated into the chromosomes or existing as an extrachromosomal DNA array with in the nucleus but does not explain how the DNA makes it’s way into the nucleus in the first place. Is it just randomly taken up by the nucleus?
Im writing a lecture right now on different ways in which you can create transgenic organisms and I want to include microinjecting into the lecture but I just know a student is going to ask me how the DNA is expressed if it’s floating around in the cytoplasm.
Hi People. In need help from you. I want to measure the maximum load capacity of a screw forging press. I dont know which is the way to ensure that the measure value is real.
Maybe some of you can give me a procedure or paper or some useful recommendations.
Thank you Sirs!!!!
I need to construct a 3D wooden bicycle trailer for Kids. The weight of bicycle trailers must also be light!
I don't know where I should start? I thought I'd start from chasis, but what criteria should I use to construct a chassis,Children's weights? no more?
The task says that the 90% of material must consist of wood.
I want to activate carbon using sulfuric acid. But before doing that, I want to learn more about the process. To be specific I want to know the chemical reactions happening during the activation process.
The Standard Model describes the phenomena within its domain accurately, it is still incomplete. Perhaps it is only a part of a bigger picture of the modern physics which includes the deeper and hidden layer of subatomic world that has been dipped into the darkness of the universe.
Hidden part of modern physics lies beyond the uncertainty principle. Included in the sub quantum scale, where quantum interactions between photons and gravitons done. Hidden and dark side of modern physics is also a place where charged particles absorb and emit energy quanta, without any description of the mechanism of absorption and emission by charged particles. In modern physics, a charged particle creates an electric field itself, but the mechanism of this process is ambiguous and does not explain how a charged particle creates an electric field?
To describe zero point energy we should consider that space is full of gravitons and graviton is a basic element to produce energy. There is no physical point in space devoid of gravity effect. Therefore, at any physical point in the space, there are energy production facilities. Under the terms of Sub Quantum energy scale, when intensity of gravitational field increases or interfere gravitational fields of two massive bodies that are moving adjacent each other, gravity produces the electromagnetic energy. But the amount of electromagnetic energy in space depends to density of gravitons in the space.
According to CPH Theory, we can describe the mechanisms of zero-point energy production without using uncertaintity principle. About the vacuum energy, the Maxwell's equations can be generalized in vacuum.
According to the quantum mechanics that photon and electron are unstructured particle, we cannot describe the mechanism of absorption and emission photon by electron that is logically unacceptable. As it was described photons are combination of positive and negative virtual photons. Photon is a very weak electric dipole that is consistent with the experience and this book is asserted.
See Sections 1 and 2 of:
Beyond the Standard Model : Modern physics problems and solutions
Hi, i have a Titanium-platinum orthopedic implant and i want to increase the surface porosity to cover it later.
I want to know wich is the best way to do that, acid corrosion or a mechanical process like sandpaper. Thanks for your help
does Thin film deposition (say sputtering) presents possibility of enhancing mechanical properties (substrate ) ? specifically from TRIBOLOGY point of view, for some industrial applications.
as film deposited shall be of nano level hence effect of base/substrate will affect prominently say in WEAR
Hello! Please tell me.
Who in China engaged in research of mechanical processing of wood and wood-based materials (milling, sawing, drilling), tool materials, woodworking tools?
I am doing a research on the investigation of semisolid metal flow inside forming die during thixoforming operation. Hence, I would like to know the processing parameters and it's effect during thixoforming operation.
Or I should apply the controllable canonical form to the plant and put the positive refeeding ?
Does the controllable canonical transformation serving exactly?
Thank you very much.
It is an observed fact that presence of moisture in atmospheric air brings down the atmospheric pressure. What is the mechanism for this process and scientific reasons associated with this fact?
Scientists from weather,atmospheric science, environment and meteorology can give a clear picture of this phenomenon.
I've made some research on kerf width formation and cutting quality and currently Im interested in evaluation the dross formation. I would like to know the method how reseacher measure dross formation for laser cutting process?
i wanted to find the load bearing capacity, bearing modulus and life of a spherical thrust bearing through simulation, please help me.
I am doing my project work on a 165 litre domestic refrigerator. First i charged it with 80 gram R134a then i have calculated enthalpy at inlet and outlet of compressor corresponding to temperature and pressure, with 80 gram i am getting enthalpy at outlet of compressor is greater than inlet. But when i charged it with 100gram then i am getting enthalpy at outlet of compressor is less than enthalpy at inlet of compressor. Someone please answer why this is happening?
I am conducting a CO2-water coreflooding experiment. I found that when I inject CO2 as gas phase into sandstone core sample to displace water, the total volume of CO2 and water produced is always higher than the injected volume of CO2. However, when I inject CO2 in liquid phase, the injected and the produced volumes are the same. Please keep in mind that the system has some dead volume of water and there is a temperature difference between the sample and where we measure the volumes.
Thank you in advance for your help
I need to select the electric motor. It should deliver a required mechanical power for particular time hours. I know the values of mechanical power and time hours. based on this data, how can I select a motor? note that the mechanical load is not constant. voltage and current values are unknown as motor is to be selected first.
I want to learn Flash Annealing terminology basicly? When the heat treatment cycle has high heating rate to soaking temperature and holding time is short, that treatment is Flash Annealing?
In cases where drought or water and food are becoming very minimal, the dromedary is the solution to drain the water present in plasma, interstitial lymph then the cellular cytoplasm! By what mechanism and process are these chemical reactions better fat breakdown of the bump?
The material being used for printing is PLA. The extrude temperature is 230oC. The platform Temperature is 110oC. The problem faced while printing is fragile delaminated FDM (fused deposition modeling) parts.
I'm interested in the turning of Stellite coatings produced by thermal spraying, particularly, produced by the HVOF technique. We have performed several short tests with conventional refrigeration by means of cutting fluids and the results are quite good in terms of surface quality. However, I would also like to test other alternatives because of the sustainability of the process. Probably, dry machining is not an adequate one by I'm considering others such as Minimum Quantity Lubrication, cryogenic refrigeration or the use of gases in combination with solid lubricants. So, I would like to kindly ask you about that, hoping that you have valuable experience in the topic or closely related.
Thank you very much for your attention and guidance.
I have attached with thermal paste but after 1 cut the thermal bead is removing, so kindly tell me how to fix it on cutting insert. The temperature is around 5000c, while doing the turning operation.
For the four-layer resistance spot welds, there are three interfaces in the spot welds, namely two side interfaces and one center interface. The nugget diameters along the two side interfaces are equal. I am thinking which one is larger between the nugget diameter along side interface and the nugget diameter along the center interface. Furthermore, at the beginning of the resistance spot welding, which interface forms weld nugget firstly, side interface or center interface?
The breakdown of cellulose and the formation of active cellulose with decomposition into char and gases has been known. However, the complex reactions into the formation of CO2 and water vapor with possible De-polymerization into 'volatiles' need to be applied to characterize the purity and efficiency of the application of the intermediates (obtained from pyrolysis) for other useful products. In our laboratory the intermediates obtained from pyrolysis of bamboo to produce activated carbon serve as waste. The knowledge of the reaction mechanisms of the process will help us to utilize the waste for useful products.
I am brazing stainless steel at 1100 deg C using pure copper as brazing filler metal. I want to stop the migration of Fe to the molten braze filler and intergranular penetration of copper into SS. Palladium may act a diffusion barrier to suppress both of the diffusion processes. I also want to avoid a nickel strike on the substrate.
I have created microchannels on PMMA and borosilicate glass. I have to stick another wafer/plate of suitable material to apply the liquid under pressure through this channel to study flow analysis. Can you suggest some material for sandwiching the same procedure so that it is leak proof?
Tool should give uninterrupted DC negative potential for electrochemical discharge machining.
I work on some approximate method for analysis of elastic Euler-Bernoulli cantilever beam. There is a concentrated mass on beam tip. Method works exelent for m/M<5 (M-tip mass, m-beam mass), but has an errors in frequencies for m/M>5. I assume that the higher values of concentrated mass violates the assumption of small deformations of beams which I introduced.
I'm looking for some information on AISI 51XX steels, especially their mechanical properties after various heat treatments and/or mechanical processing (hot forging especially). I would really appreciate it if anyone would help me with this matter.
For deep groove ball bearings, there are formulas to calculate their characteristic defect frequencies (CDF), such as the characteristic frequency of inner race fault, the characteristic frequency of outer race fault and the characteristic frequency of ball fault. Can I use these same formulas to calculate the CDFs of the spherical roller bearings?
I am using two steel sheet materials for carrying deep drawing operations using tailor welded blanks. It is becoming difficult to measure the laser weld properties since the weld is very narrow. Some researchers are analysing with the help of hardness measured across the weld. Is there any other method of analysing such as testing a longitudinal weld ? In that case what is the standard tensile specimen?
I have done micromachining on boro silicate glass and PMMA (acrylics) and want to do structural study at machined areas.
Since zero holder chucks are difficult to obtain, I tried to solder the tip of 250 micron wire to increase the diameter, but its giving hobbling when chuck is given rotation.
Welding introduces contact resistances in the joint between pipe and external horizontal fin. Any other better methods to join the fin with the pipe? Say Copper fin with copper pipe (or) mild steel fin with mild steel pipe.
The maximum permissible angle of bite is the most dominant limitation in pass dimensions selection. What are the other limitations? And what are the recommended values of them?
The aim of this question is regarding my university thesis, I am trying to see the environmental benefits of using crushed glass particles (0 - 0.2 mm through to 2mm) as an alternative shot blasting media.
Blurs and micro projections are to be removed from micro holes of 500 microns diameter and micro channels of 600 microns width from glass and silicon wafers after micro machining. Is it possible to use lapping paste for the same?
Since it has better yield strength than steel, less vonmises stresses when compared ..
Component made with casting process is lighter than the component made with other machining processes. How?
It have been reported that there could be up to 7-10% of residual grits on grit-blasted surface, the size of residual grits contamination area can be as big as 20 um. How to eliminate the residual grits contamination on grit-blasted low carbon steel surface?
Since the whole operation of levitation is by either attractive or repulsive forces of a magnet then the material used in the rail should be a magnetic type.