Compression Test Simulation of Thick-Section Composite Materials
ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB
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An improved compression test concept for thick-section composite materials based on a stress analysis simulation study is presented. An end loading method involving specimen support by a locked hemispherical seat was identified as the most desirable. The results showed that this method could substantially reduce the stress variation due to specimen imperfection and loading eccentricity. Compression test methods are analyzed using a finite element methodology. Limitations of the test methods are identified with respect to their ability to obtain the desired uniform stress field. The end loading method proved to be superior to the side loading method for the thick-section composite material. The frictional forces introduced by the end loading method can reduce local failure at the specimen end. The zone of end effects on the stress distribution was obtained for the composite material.
- Laminates and Composite Materials
- Numerical Mathematics