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530.352 Materials Selection

530.352 Materials Selection. Lecture #6 : Elastic properties Wednesday September 21 st , 2005. Anisotropic elasticity :. ? i = C ij ? j. ? i = S ij ? j. For Cubic crystals :. C 11 = C 22 = C 33 , C 44 = C 55 = C 66 , C 12 = C 21 = C 13 = C 31 =C 23 = C 32 , all others = 0.

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530.352 Materials Selection

530.352 Materials Selection. Lecture #16: Dislocations Tuesday October 18 th , 2005. U. ~ 2 ? Th. E. F. ? Th. r o. 1.25r o. r. Theoretical strength :. 2 ? Th = E ? = E ? L/L o 2 ? Th = E 0.25r o /r o = E/4 ? Th = E/8. Atomic description of plasticity:.

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elasticity

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