true or false isotropic material have preferential direction regards to mechanical properties true stress true strain...

true or false

isotropic material have preferential direction regards to mechanical properties

true stress true strain are defined using the actual forced displacement and geometry of the tested specimen at any time

cup-and-cone fracture are characteristic of brittle materials

the endurance limit is the value of fatigue strength that the c-N curve at 10^7 cycles

imperfection/defects in the structure make them weaker

examining the fractured sirface of a material can help determine whether the material is brittle or ductile

fracture always results from crack formation and crack propagation

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