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In Classical Lamination Theory (CLT), the laminate stiffness matrix is called the:
A{'text': 'ABC matrix', 'label': 'A'}
B{'text': 'ABD matrix — three 3×3 sub-matrices A (extensional), B (coupling), D (bending) related to laminate stiffness', 'label': 'B'}
C{'text': 'XYZ matrix', 'label': 'C'}
D{'text': 'Q matrix', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'ABD matrix — three 3×3 sub-matrices A (extensional), B (coupling), D (bending) related to laminate stiffness', 'label': 'B'}
CLT relates force and moment resultants {N, M} to mid-plane strains and curvatures {ε°, κ}. The 6×6 stiffness matrix partitions into A (in-plane extensional), B (extension-bending coupling), and D (bending) — collectively the ABD matrix.
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