Question

Please make sure to display your thought process? It is imperative to be able to follow how the answer was deduced. Please be as thorough as possible. Please address all parts of this question as they are all part and critical to answering this question correctly. Please show good integrity when answering the question:

The mechanical behavior of an oriented nylon fiber can be described using the following elastic constants [in 10^-10 Pa^-1]: s₁₁= 7.3, s₁₂= -1.9, s₃₃ = 2.4, s₁₃ = -1.1 and s₄₄ = 15. What is the tensile modulus of such a fiber (chain direction is the 33 direction)? If this fiber is loaded to 20 MPa in uniaxial tension (in the 33 direction) what are the resultant normal strains (ε₁₁, ε₂₂ and ε₃₃)?

Answer 1