Stress Fracture Criteria for Laminated Composites Containing Stress Concentrations

SAGE Publications - Tập 8 Số 3 - Trang 253-265 - 1974
James M. Whitney1, R.J. Nuismer1
1Nonmetallic Materials Division Air Force Materials Laboratory Wright-Patterson AFB, Ohio 45433

Tóm tắt

Two related criteria based on stress distribution are presented for predicting the uniaxial tensile strength of laminated composites containing through the thickness discontinuities of a general shape. The criteria result in two parameter (unnotched tensile strength and a characteristic dimension) models which are capable of predicting observed discontinuity size effects without resorting to classical concepts of linear elastic fracture mechanics. As a direct consequence of the stress criteria, however, a relationship between Mode I fracture toughness and unnotched laminate tensile strength is determined. Limited comparison of theory to experimental data for circular holes and straight cracks yields good results. The simplicity of the analytical approach coupled with its generality make it of practical value to the designer.

Từ khóa


Tài liệu tham khảo

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Thông tin
Thông tin xuất bản

SAGE Publications

Tập 8 Số 3

253-265

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