Strength prediction in CFRP woven laminate bolted single-lap joints under quasi-static loading using XFEM
This paper is concerned with modelling damage and fracture in woven fabric CFRP single-lap bolted joints that fail by net-tension. The approach is based on the assumption that damage (matrix cracking, delamination and fibre tow fracture) initiates and propagates from the hole in a self-similar fashi...
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| Main Authors: | , , |
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| Format: | Article |
| Published: |
Elsevier
2014
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1016/j.compositesa.2014.07.013 http://dx.doi.org/10.1016/j.compositesa.2014.07.013 http://eprints.uthm.edu.my/5835/1/mohd_hilton_ahmad_U.pdf |
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| Summary: | This paper is concerned with modelling damage and fracture in woven fabric CFRP single-lap bolted
joints that fail by net-tension. The approach is based on the assumption that damage (matrix cracking,
delamination and fibre tow fracture) initiates and propagates from the hole in a self-similar fashion. A
traction–separation law (based on physically meaningful material parameters) is implemented within
an Extended Finite Element Method (XFEM) framework and used to predict the joint strength. Reasonable
agreement between model and experiment was obtained for test configurations covering different weave
types and lay-ups, a range of joint geometries (two hole diameters and a range of normalised joint
widths) and finger-tight and fully torqued clamp-up conditions. The greatest discrepancies were for
situations where the tensile fracture mechanisms were more complex, and hence not captured fully in
the model or when bearing failure occurred. |
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