# CH-3 AMOS

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1. Give relationships between variation of strain components with displacement variation.
2. What is the first law of thermodynamics?
• The work performed on a mechanical system plus the net heat that flows into the system equals the increase in internal + kinetic energy of the system.
• δw+δH=δU+δK
3. What are the assumptions used in introducing force quantities?
• 1.Static equilibrium δK=0
4. Give the relationship between variation of internal energy density in terms of stress components and their variations?
5. Uis a function of what all variables?
U0=U0xx,εyy,εzz,εxy,εxz,εyz,x,y,z,T)
6. Give relation between stress strain and internal energy density.
7. Relation between strain energy density and its complementary?
σε=Uo+Co
8. Relationship between Complementary Strain energy density, stress and strain.
9. Give Hooke's law for 3-D
• In 3-D it asserts that each of the stress components is a linear function of the components of the strain tensor.
10. What do you mean by anisotropic material?
Materials that exhibit stress-strain relationship as given by the Hooke's law in 3-D involving a number of independent elastic coefficients are said to be anisotropic.
11. How many elastic coefficients are there in general anisotropic linear materials?
21
12. Give the strain energy density of a general anisotropic material.
 Author: abhisheksinha91 ID: 249618 Card Set: CH-3 AMOS Updated: 2013-11-29 18:52:30 Tags: Mechanical Engineering Folders: Description: AMOS Show Answers: