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Composites offer great promise as light weight and strong materials for high performance structures. Even though substantial tests have been made on composite materials, little has been gained in the understanding and development of a predic tive procedure for composite failure.
The assessment of crack initiation and/or propagation has been the subject of many past discussions on fracture mechanics. Barring changes in the local temperature,* the energy released to create a unit surface area of an existing crack can be obtained by considering the change in elastic energy of the system before and after crack extension.
The assessment of crack initiation and/or propagation has been the subject of many past discussions on fracture mechanics. Barring changes in the local temperature,* the energy released to create a unit surface area of an existing crack can be obtained by considering the change in elastic energy of the system before and after crack extension.
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