Abstract This paper reports on work being undertaken in the Cooperative Research Centre for Advanced Composite Structures Ltd. (CRC-ACS) to develop improved techniques for predicting the failure of composite materials. The procedures being investigated include a maximum strain criterion for fibre failure. For failure of the resin a new approach, which includes determination of the residual stresses due to manufacturing, is being trialed. This work closely parallels the new criteria proposed by Gosse and Hart-Smith [AIAA/CRC-ACS text on composite materials, submitted for publication] and we have subsequently replaced a simple stress criterion for matrix failure with their proposals based on strain invariants. The new procedures are applied to the failure of laminates in bolted joints with complex steered fibre patterns. Thermal residual stress was included to predict the matrix failure of T-section laminates under loads that open the angle between the flanges and the web. Here a transverse tension stress criterion was used.
[1]
L. J. Hart-Smith,et al.
Predictions of the original and truncated maximum-strain failure models for certain fibrous composite laminates
,
1998
.
[2]
L. J. Hart-Smith,et al.
Predictions of a generalized maximum-shear-stress failure criterion for certain fibrous composite laminates
,
1998
.
[3]
L. Hart-Smith.
Mechanistic failure criteria for carbon and glass fibers embedded in polymer matrices
,
2001
.
[4]
Phantom Works,et al.
STRAIN INVARIANT FAILURE CRITERIA FOR POLYMERS IN COMPOSITE MATERIALS
,
2001
.
[5]
Don Kelly,et al.
A study of fastener pull-through failure of composite laminates. Part 1: Experimental
,
1999
.
[6]
Don Kelly,et al.
A study of fastener pull-through failure of composite laminates. Part 2: Failure prediction
,
1999
.
[7]
J. M. Alexander,et al.
Advanced mechanics of materials
,
1977
.