Boundary Elements for Debond Stress Analysis; Fracture Mechanics Stress Analysis.
Final rept. 1 Mar 82-28 Feb 83,
IMPERIAL COLL OF SCIENCE AND TECHNOLOGY LONDON (ENGLAND) DEPT OF MATHEMATICS
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To understand and quantify debonding events in composite materials it is necessary to have accurate stress analysis in the area of stress concentrators. Boundary integral equation BIE techniques are proposed as a potentially more accurate approach than finite elements. In particular, the debond stress analysis of a rod being pulled out of a matrix material is considered. A model problem is posed consisting of an edge cracked bar under longitudinal shear deformation and a BIE formulation is proposed using a subtraction of singularity technique. An extensive review of integral equation approaches to various fracture mechanics problems is also presented, with suggested new solution techniques for unsymmetric crack configurations. Originator-supplied keywords include Boundary integral equations, Boundary elements, Boundary element methods, Fracture mechanics, Stress singularities.
- Laminates and Composite Materials
- Numerical Mathematics