SYMMETRIC laminate (about the mid-plane) is required to:

Question

Accepted Answer

B. {'text': "Eliminate BENDING-EXTENSION coupling — so in-plane loads don't cause out-of-plane bending", 'label': 'B'}

Symmetric stacking ⇒ B-matrix in classical lamination theory vanishes. In-plane loads produce only in-plane strains, no bending; bending moments produce only curvature, no in-plane strain. Critical for predictable behavior.

Answer

{'text': 'Reduce weight', 'label': 'A'}

Answer

{'text': 'Increase strength only', 'label': 'C'}

Answer

{'text': 'Make it cheaper', 'label': 'D'}