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In a fiber-reinforced composite, a "DISCONTINUOUS" or short-fiber composite is one where:
A{'text': 'Properties do not depend on fiber direction', 'label': 'C'}
B{'text': 'Properties VARY with fiber length', 'label': 'B'}
C{'text': 'Fibers are arranged in 3D', 'label': 'A'}
D{'text': 'Fibers and matrix are the same material', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'Properties VARY with fiber length', 'label': 'B'}
Short-fiber (discontinuous): mechanical properties (especially modulus, strength) vary with fiber length, because load transfer through the matrix is incomplete for short fibers. Continuous fiber: further increase in length no longer affects elastic modulus.
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