Test Your Mastery of High-Performance Composites
A rigorous set of questions probing deep knowledge of fiber-reinforced structures, matrix behavior, and manufacturing techniques.
Quiz Questions
Answer all questions below and test your knowledge.
- 1
Which equation correctly predicts the longitudinal elastic modulus of a unidirectional fiber-reinforced composite assuming perfect bonding?
- 2
The minimum fiber length required for effective stress transfer in a short-fiber composite is known as the critical fiber length. Which expression defines it?
- 3
When the operating temperature exceeds the glass transition temperature (Tg) of a polymer matrix, which change most directly compromises composite stiffness?
- 4
Which Halpin–Tsai formulation best estimates the transverse elastic modulus of a composite with circular fibers?
- 5
In a lightweight sandwich panel, which core failure mode most often initiates catastrophic collapse under compressive load?
- 6
Which advantage is uniquely associated with out-of-autoclave (OoA) curing of carbon-fiber composites compared to traditional autoclave cycles?
- 7
The S-N curve of a fiber-reinforced polymer is often described by Basquin’s equation. Which parameter primarily reflects the material’s fatigue strength at a given cycle count?
- 8
A composite experiences internal stresses due to differing coefficients of thermal expansion (CTE) between fiber and matrix. Which condition minimizes these residual stresses after cooling from cure temperature?
- 9
In the shear-lag analysis of a unidirectional lamina, the stress transferred to a fiber decays exponentially from the fiber ends. Which parameter governs the rate of this decay?
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