Restricted accessResearch articleFirst published online 1999-01
Stress Rupture of Unidirectional High Performance Thermoplastic Composites in End-Loaded Bending at Elevated Temperatures. Part II: Analytical Modeling
The equations of shape for a specimen under end-loaded bending are derived for a different coordinate axis using the theory of large displacements of buckled bars (The Elastica). The strain and stress distributions along the length of a unidirectional fiber reinforced composite undergoing stress rupture in end-loaded bending are established. Two life prediction models are constructed and compared to experimental results for an AS4/PPS composite. The models are respectively based on the nucleation and propagation of the microbuckles. The latter model compares well with the experimental stress rupture data for AS4/PPS composites in end-loaded bending at 120°C.
1. Mahieux, C. A., B. E. Russell and K. L. Reifsnider, 1997. "Stress Rupture of Unidirectional Polymer Matrix Composites in End-loaded Bending at Elevated Temperatures. Part I: Experimental characterization of the failure mode," to be published.
2.
2. Fukuda, H., H. Katoh and H. Uesugi, 1995. "A Modified Procedure to Measure Bending Strength and Modulus of Advanced Composites by means of Compression Bending,"Journal of Composite Materials, 299(2):195-207.
3.
3. Timoshenko, S. P., J. M. Gere, 1988. Theory of Elastic Stability. McGraw Hill, pp. 77-82.
4.
4. Jones, R. M., 1975. Mechanics of Composite Materials. Taylor and Francis.
5.
5. Schapery, R. A., 1991. "Analysis of Local Buckling on Viscoelastic Composites,"IUTAM Symposium on Local Mechanics Concepts for Composites Material Systems, October 28-31, 1991.
6.
6. Slaughter, W. S. and N. A. Fleck, 1993. "Viscoelastic Microbuckling of Fiber Composites,"J. Appl. Mech., 60:802-806.
7.
7. Budiansky, B. and N. A. Fleck, 1994. "Compressive Kinking of Fiber Composites: A Topical Review."App. Mech. Rev., 47(6).
8.
8. Kanninen, M. F., C. H. Popelar, 1985. "Advanced Fracture Mechanics." in Oxford Engineering Sciences Series. New York, pp. 37-39.
