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Question 1 Four test coupons are machined out of a block of material, as indicated in the schematic. Each is tested under uni

What can you conclude about the material symmetry of this material? It is isotropic. It is not isotropic (it is anisotropic).
engineering   Mechanical-Engineering   
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1) A material is said to be homogeneous is it has similar properties throughout in any particular direction. As we can see, stress strain curve for samples aligned in same direction but from different location coincides hence we can say material is likely be homogeneous. ( Why likely? Why not sure? Because it can happen that you take another sample aligned in same direction but it results in stress-strain curve different from that of other samples aligned in same direction)

2) A material is said to be isotropic if it has similar properties in all directions at a given location. Which in our case means that it has to have same stress strain curve for samples aligned in different directions which is not the case in the question so material is Anisotropic .

3) Linearity of material means that stress strain are related linearly which is the case shown as curve on stress-strain coordinate is straight line. So material is Linear.

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