6. What is the difference between isotropic and anisotropic materials ?
If a material exhibits same mechanical properties regardless of loading direction, it is isotropic, e.g., homogeneous cast materials. Materials lacking this property are anisotropic.
7. What are orthotropic materials ?
It is a special class of anisotropic materials which can be described by giving their properties in three perpendicular directions e.g. wood; composites.
8. What is Curie point ?
Curie point is the temperature at which ferromagnetic materials can no longer be magnetised by outside forces.
9. What is the percentage of carbon in cast iron ?
2.5%
10. Why is it that the maximum value which the residual stress can reach is the elastic limit of the material ?
A stress in excess of elastic limit, with no external force to oppose it, will relieve itself by plastic deformation until it reaches the value of the yield stress.
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In Mechanical Engineering QA
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