Structural Analysis and Materials Science Flashcards
6 cards from real ME or MEng Master of Engineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Structural Analysis and Materials Science flashcards as text
Hooke's Law states that stress is proportional to strain within the:
Answer: Elastic limit
Hooke's Law (σ = Eε) holds only within the elastic limit, where deformation is fully recoverable upon load removal.
The moment of inertia of a rectangular cross-section (width b, height h) about its centroidal axis is:
Answer: bh³/12
The second moment of area for a rectangle about its centroidal axis is I = bh³/12, used in beam bending calculations.
In beam theory, the neutral axis is the location where:
Answer: Bending stress is zero
The neutral axis is the centroidal axis of the cross-section where bending stress is zero; material above and below carries tension or compression.
Poisson's ratio for a material is defined as:
Answer: Negative ratio of lateral strain to axial strain
Poisson's ratio ν = −ε_lateral/ε_axial describes the lateral contraction that accompanies axial elongation in an elastic material.
Euler's critical buckling load formula for a column is P_cr =:
Answer: π²EI / (KL)²
Euler's formula P_cr = π²EI/(KL)² gives the axial load at which a slender column buckles, where KL is the effective length.
The von Mises yield criterion predicts yielding when:
Answer: The effective (von Mises) stress equals the uniaxial yield stress
Von Mises criterion states yielding occurs when the distortion energy per unit volume equals that at uniaxial yield, expressed as σ_vm = σ_y.