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In CLT, the A matrix relates which physical quantities?
A{'text': 'Bending moments to curvatures', 'label': 'A'}
B{'text': 'In-plane force resultants {N_x, N_y, N_xy} to mid-plane strains {ε°_x, ε°_y, γ°_xy}', 'label': 'B'}
C{'text': 'Curvatures to in-plane strains', 'label': 'C'}
D{'text': 'Through-thickness shear stress to displacements', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'In-plane force resultants {N_x, N_y, N_xy} to mid-plane strains {ε°_x, ε°_y, γ°_xy}', 'label': 'B'}
A is the extensional stiffness matrix: it links in-plane forces (lb/in or N/m) to mid-plane in-plane strains. Units: force/length.
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