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LOAD INTRODUCTION IN TUBULAR COMPOSITE SPECIMENS
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English
Abstract
A study of load transfer at the ends of tubular composite laminates has been performed such that in-plane loads, singly or in any combination, can be passed between end tabs and the tubular structure in a way that will minimize stress concentrations at geometric discontinuities. Axisymmetric anisotropic finite element analyses were performed to determine the stress concentrations through an evolution of end tab materials and configurations. Tapered end tabs that utilize multiple materials of increasing rigidity from the tubular specimen to the point of gripping were shown to be the most effective means of minimizing stress concentrations. The study shows the criticality of end design in transferring loads to tubular composite specimens and suggests several tapered end tab configurations that can substantially reduce stress concentrations.
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Citation
Vanderby, R., Daniel, I., Koller, G., and Liber, T., "LOAD INTRODUCTION IN TUBULAR COMPOSITE SPECIMENS," SAE Technical Paper 790985, 1979, https://doi.org/10.4271/790985.Also In
References
- Cole, B. W. Pipes, R. B. “Filamentary Composite Laminates Subjected to Biaxial Stress Fields” AFFDL-TR-73-115 June 1974
- Lindholm, U. S. Nagy, A. Yeakley, L. M. Ko, W. L. “Design of a Test Machine for Biaxial Testing of Composite Laminate Cylinders” AFFDL-TR- 75-83 July 1975
- Sandhu, R. S. “Stress Analysis of Axisymmetric Solids” The Ohio State University Columbus, Ohio 1972
- Wilson, E. L. “Structural Analysis of Axisymmetric Solids” AIAA Journal 3 12 December 1965 2269 2274