The principle of superposition can be applied to a structural system when the system is
Correct answer: D. Linear elastic with small deformations
- A. Unstable under its applied loading
- B. Plastic with unrestricted yielding
- C. Geometrically nonlinear with large rotations
- D. Linear elastic with small deformations
Explanation
Superposition is valid when load response is linear, which generally requires elastic material behavior and small deformations. In plastic or strongly nonlinear systems, the response to combined loads is not necessarily the sum of separate responses.
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About Structural Analysis
Structural analysis determines how beams, frames, trusses and arches carry loads through reactions, shear forces, bending moments, axial forces and deflections. It covers free-body diagrams, equilibrium equations, determinacy, influence lines and methods such as slope deflection, moment distribution and virtual work, while distinguishing analysis of a structure from its design.
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