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Composites
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Quiz
1. There is a number of sources for residual stresses in composites such as:stresses in composites such as:
a) Hardness mismatch.b) Mi t h f th l i ffi i tb) Mismatch of thermal expansion coefficient.c) Density difference.
Quiz
2. The stresses at the interface are compressive in radial direction Ifin radial direction. If
a) αf <αm
b) >b) αf >αm
Quiz
3. Put √ or X:) C i t t th i t f l d ta) Compressive stresses at the interface led to a
strong bonded interface which attract thek t itcracks to cross it.
b) Trangranular facture means high fracturetoughness.
c) Good wetting or contact obtained if γSV (fiber)SV (fiber)is lower than γLV (matrix)