Energy Methods in Optimization of Composite Materials.
Final rept. Jun 74-Jul 75,
VERMONT UNIV BURLINGTON DEPT OF MECHANICAL ENGINEERING
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A theory of fracture is presented for a quasistatic, adiabatic process. The theory is based on the principle of the maximum rate of entropy production. It is founded on the fundamentals of continuum mechanics and the calculus of variations. Specifically, the motion of the crack is discussed, including initiation, its direction as determined by a variational principle, crack arrest, and the conditions for instability in the running crack. The theory is seen to predict results of previous authors. Experimental results appear. Author
- Laminates and Composite Materials