期刊
COMPOSITE STRUCTURES
卷 297, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2022.115987
关键词
Residual stress; Blind hole drilling; Finite element analysis; 3D woven composite; Electronic speckle pattern interferometry
资金
- National Science Foundation [CMMI-1662098]
This study investigates the effects of the matrix material constitutive model and the presence of defects on the development of manufacturing induced residual stresses using Finite Element (FE) analysis. The results suggest that viscoelastic matrix properties should be considered in order to accurately reproduce the residual stress fields, and the possible presence of cracks at the tow/matrix interface should not be neglected.
Effects of matrix material constitutive model and presence of defects on development of manufacturing induced residual stresses are studied using Finite Element (FE) analysis in an orthogonal 3D woven composite. The residual stresses are assumed to arise from a difference in the coefficients of thermal expansion between the reinforcement and the matrix. Numerical results are compared with experimentally observed surface displacements resulting from blind hole drilling and measured via electronic speckle pattern interferometry. It is demonstrated that for accurate reproduction of the residual stress fields using FE modeling, viscoelastic matrix properties should be used and possible presence of cracks at the tow/matrix interface should not be neglected.
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