Damage tolerance: fracture mechanics in design


Fracture mechanics methods are usually applied if a cracklike flaw is detected in a structural component and a decision has to be taken with respect to limited further service, or if a failure case has to be assessed. The present contribution demonstrates various options for the inclusion of fracture mechanics in the design process. A number of fracture mechanics based concepts are available; these include classical damage tolerance, proof testing, and periodic removal of cracks through grinding. Until now, less attention has been paid to application in the design stage, where, however, consistent inclusion of fracture mechanics in design promises substantial potential in designing against failure.
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