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Questions tagged [yield-point]

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Yield properties of plastic material

What is meant by yield of isotropic plastic material? How is yield of Isotropic plastic material different from the term normal yield which is referred as transition from elastic behaviour to plastic. I am bit confused of term Yield of Isotropic…
John
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Why is local yielding considered the limiting case in context of buckling in Eurocode?

In Eurocode, when use buckling curves to calculate the maximum load that a compressive member can be subjected to before it risks buckling. Buckling curves are based on the Perry-Robertson formula. I'm reading a derivation of the formula here. The…
S. Rotos
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Difference between 'plastic yielding' , 'plastic yield strength', plastic strength' and 'plastic stress'?

I am going through a literature where these terms are regularly used and I am confused are they different and if yes then what does each term mean? I also want to know relation of plastic strength of a rock (say granite) with pressure. I mean which…
Ather Cheema
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Low-tech ways of assessing relative strength of a material (yield point)

I want to compare strength of a metal before and after heat treatment, to assess to effectiveness of that treatment. (See my previous question, Aluminium softened by brazing. How to harden?). Specifically, I want to find the yield point (the strain…
Jayy
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Why isn't von Mises criterion valid when compressive and tensile yield stresses differ?

For example here, it is mentioned: The von Mises criterion is NOT a valid yield (failure) criterion for materials with different yield stress values in tension and compression. I can't really understand why this is true. I can't really think of a…
S. Rotos
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Buckling vs. Yielding Failure of Columns

As I have been working through examples of construction projects, I've noticed that in nearly every case of a structural column (sample size considers only homogeneous material columns, no composite structures) the materials chosen to construct the…
Richard Bonnardel
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Sheet Metal Bending: stuck on calculating the minimum radius required

I'm used to calculate the minimum radius required for bending operations on both aluminum and steel sheets, given the following parameters: https://i.sstatic.net/yxEBc.jpg Problem statement: For a sheet metal stock with inch thickness, determine…
user6039980
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Why does the yield strength of steel go up if I reduce the thickness of the specimen?

When I look at the yield of one material then you find more than one yield for different thickness. why the yield changes with changing the thickness. is there an equation to prove this ?
Adam Joe
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Definitions of strength?

Can tensile strength be the same as yield strength? Can Flexural Yield Strength be related to the yield strength of a material in any way?
Hypnos Stratagem
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Estimating pressure near the edge of holes

Suppose I have a 20mm pipe with water flowing through it. The pressure in the pipe is 0.5 MPa. The pipe widens at a certain point and contains a metal object that blocks the pipe but has a number of holes in it that the water can flow through. The…
EddieP
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Does yield point of steel depend on thickness?

I have two different plates of different thickness and I need to calculate yield point. Does yield point of steel plate changes with changing of plate thickness?
Akshay Wagdole
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How can a thicker pipe withstand more pressure? (In general how does geometry affect stress)

I'm misunderstanding something about how geometry affects yield stress. I think this example best illustrates my confusion: Say you have two pipes with the same internal diameter, same material grade, and same internal pressure (The internal…
BoddTaxter
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What would happen if we applied a stress greater than the yield stress to a rigid-perfectly plastic material?

Say we had a material that was rigid perfectly plastic, with a stress-strain characteristic as shown: Say that we are drawing this material through two dies, something like this: What would happen if the drawing stress applied were greater than…
VJ123
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Plasticity (stress(strain)) interpolation in Abaqus

The stress-strain data for a plastic deformation is given in table.   I have two questions related to how that table is treated: How is data interpolated? Is it piecewise linear or something else? What if the plastic strain is larger than the…
skrat
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Reasonable expected yield strength of A513 steel

I'm looking to build a fish-tank stand for a decently large fish tank (300 gal). I'm looking at building it out of A513 steel because that is easily available locally. However, I am having trouble finding a good yield stress to build my design on.…
Cort Ammon
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