Question

PROBLEM 4.3 An orthotropic lamina has the following properties: E, = 160 GPa st) = 1800 MPa Ea-10 GPa -1400 MPa Va-0.3 40 MPa Gia-7GPa230 MPa Ar = 100 MPa according to: (a) the maxiices rion, and uct the failure surfaces in the a,-o, stress s d the Tsai-Hill criterion. maximum stress criterion, (b) the maximum strain crite- stres ding to: (a) the PROBLEM 4.4 the material properties from Problem 4 are the .3 and assuming that the stiff- me in tension and compression, determine the allowable nesseis sheon, (b) the maximum strain criterion, and (c) the Tsai- ear stress, try a maximum stress criterion are and discuss the results and check both positive and negative values of t

Answer 1

ven Ct i20.3 maimu Stan Citeien 2 0.3

Cc) Accading ST L-T 212 t oD 9 2 220 Chleten