Question

QUESTION1 vielding or permanent deformation is a pronounced sliding along certain angular planes in the material True False QUESTION 2 The maximuth normal stress theory of failure is the only theory to be used for brittle materials True False QUESTION 3 In order to apply one of the failure theories to estimate the factor of safety, we have to ouse the state of stress find the principal stresses calculate the maximum shear stress e use the ultimate strength of the material Click Save and Submit to save and submit. Cliek Save All Answers to save all answers 3 4 6

Answer 1

True, if material is Ductile because in ductile material cup and cone fracture occur, but it is not if material is Brittle. True, For Brittle material maximum principal theory or Runtime theory is best. For the calculation of factor of safety we have to use ultimate strength of material.