Three-dimensional boundary element analysis of residual stresses in a cross-ply fiber composite model
Thesis/Dissertation
·
OSTI ID:7164099
The residual stress distribution in cross-ply laminates is investigated at the microstress level within the scope of linear viscoelasticity. Matrix and fibers are treated as subzones coupled with displacement continuity and traction equilibrium conditions along the interface. A three-dimensional boundary element method appropriate to estimate residual stresses in a cross-ply laminate model is presented, in which the time domain method for viscoelastic analysis of the matrix zone is used. In order to achieve an accurate and efficient integration scheme, a modified Simpson's rule with respect to time is employed. New two-dimensional BEM computer programs (BEM2DV) and three-dimensional BEM programs (BEM3DV) were developed Analysis capabilities of these new computer codes include stress analysis of two-dimensional and three-dimensional elastic, viscoelastic, and thermoviscoelastic objects with subregions of different materials. Resulting residual stresses are the same order of magnitude as that of the matrix strength.
- Research Organization:
- California Univ., Los Angeles, CA (United States)
- OSTI ID:
- 7164099
- Country of Publication:
- United States
- Language:
- English
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