Transverse failure initiation in polymer composites
- Lulel Univ. of Technology (Sweden)
Although transverse failure of composites has been the subject of many studies, details of failure mechanisms remain unknown. Initiation of failure may occur in two major ways, by interfacial debonding or by initiation in the matrix. In the present study we attempt to model failure initiation in the matrix, which is subjected to a highly triaxial stress state. Experiments show failure strains of 0.5-0.8% in epoxies subjected to triaxial loading, regardless of uniaxial failure strains. It will be shown that yield criteria are unable to explain this. Instead a new criterion has been developed. Predictions are compared with experimental epoxy data for different stress states. Finite element analysis is also performed for composites with different fiber content and packing geometries. Failure initiation is predicted and discussed on the basis of different criteria.
- OSTI ID:
- 175267
- Report Number(s):
- CONF-950686-; TRN: 95:006111-0221
- Resource Relation:
- Conference: Joint applied mechanics and materials summer meeting, Los Angeles, CA (United States), 28-30 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of AMD - MD `95: Summer conference; PB: 520 p.
- Country of Publication:
- United States
- Language:
- English
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