Feb 18, 2016 · Here is a diagram of true stress and strain curve in tension, and here is a diagram of true stress and strain curve in compression . Compression will still rise above tension curve in the plastic region, according to the pictures provided; but you cannot have a general talk about simply "typical metals".

Dec 11, 2022 · Here this is a Load-Displacement curve from a compression test I did earlier with my colleges, Below is the resulted stress strain curve from the test from the lab computer why did the curve not st...

Feb 3, 2017 · This effect is called static strain aging: the material is allowed to age after extension to a static (constant) strain. It is worth noting that at or above the temperature where interstitial diffusion is as fast as the dislocation motion, the upper and lower yield point phenomena change into a serration on the stress-strain curve.

Feb 28, 2020 · The decreasing part of the curve (post-peak) can be obtained by testing the specimen with displacement controlled test machines. My question is why do we prefer the strain controlled compression test instead of the stress controlled test? We use the stress-strain curve to calculate ultimate strength capacity of the section.

Apr 13, 2021 · if the material is mild steel then the easiest way to find the yield stress is to plot the stress strain and find the first knee in the curve. if the material does not have a clear yield point, what you do, is you start from 0.2% strain and draw a straight line parallel to the Elastic part of the line (see below). The proof stress 0.2% ...

Mar 19, 2020 · Generally, Young's is used for metals, which deflect (stress) and instantaneously spring-back (strain) when the load is removed, which is elastic. Most polymers are viscoelastic, except PTFE (teflon), which exhibit viscous and elastic properties when undergoing deformation (deflection) and exhibit time-dependent strain (spring-back).

Nov 11, 2020 · Concrete has a very unusual stress strain curve (see below). After a maximum in stress carrying capacity is reached there is a very rapid dropoff with increasing strain. So, the rectangular section attempts to capture the plasticity of the section. Why 85% of compressive stress. UPDATE answers from other SE users were more enlightening on this ...

May 14, 2020 · Stress-strain and Young's modulus-strain curves. (a) Stress-strain curve from a 7.7 mm length sample of open cell PU foam (0.09 g.cm-3) used to model very low density human cancellous bone and (b) the Young's modulus determined from it as the gradient of the curve. The yield point is defined by the point at which the Young's modulus decreases ...

Mar 31, 2021 · The stress-strain curve is relevant to all specimens made from this material. The Load-extension curve is relevant to specimens with only one combination of L and A. So if you take a specimen with double the thickness, then the Force-extension diagram will change. (the force will double for the same displacement). However the stress vs. strain ...

Oct 18, 2018 · $\begingroup$ Every engineer who at least attended in material 101, knows the difference between TRUE and ENGINEERING strain-stress curve, your diagram is called ENGINEERING stress-stress curve. This is not about language or grammar, and of course users should emphasise on technicality.