'Crack tips' presentation slideshows

Composites - overview

Composites - overview. Artificial combination of matrix phase & dispersed phase. Matrix: metal, alloy ceramic mat'l polymer. Dispersed phase: particulate fiber. Works like precipitation hardening. Composites - metal matrix composites (MMCs). Particulates:

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Creep

Creep. Relaxation. Creep of cellulose acetate. 40 0 C. 10. 60 0 C. 92 0 C. 80 0 C. 100 0 C. 9. Log E(t), (dynes/cm 2 ). 110 0 C. Stress relaxation. of PMMA. 112 0 C. 8. 120 0 C. 115 0 C. 125 0 C. 7. 135 0 C. 0.001. 0.01. 0.1. 1. 10. 100. 1000. Time (hours).

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Composites

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