Analyse Composite Materials using ANSYS

A: The boundary is the reference axis, not symmetry. Symmetric stacks cancel bending-extension coupling, but sign errors still flip shear coupling if the angle reference is wrong. Without instrument datasheets, axis intent is all you have. You confirm whether the drawing's X-axis matches ANSYS global X before touching ply order.

A: The threshold is the failure mode. Coupon data alone doesn't cover load introduction, free-edge, or ply drop effects. The guidance pushes you to one higher level of test that exercises the same failure mechanism you're claiming in ANSYS.

A: The number is 135 GPa. For a single 0° ply loaded in its 1-direction, Ex equals E1 under plane stress. Poisson terms affect coupling, not the axial modulus you read back.

A: The boundary is cycles, not peak load. Trending divergence under repeat loading points at damage accumulation, something a limit-load pass doesn't clear, especially without full build records.