Affiliation:
1. Department of Aeronautical and Astronautical Engineering and Department of Theoretical and Applied Mechanics University of Illinois at Urbana-Champaign Urbana, IL 61801
Abstract
Residual stresses are known to be detrimental to a number of mechanical properties in composite materials. The mechanisms by which they develop in the filament winding of composite cylinders and tubes is not fully understood. In this work a process model is presented to predict the residual stresses induced during the processing of two- layer composite cylinders. Chemical shrinkage, thermal expansion/contraction, and cure- dependent mechanical properties are accounted for in the model. The influence of mandrel stiffness and thermal expansion coefficient is examined and a case study of an aluminum and a steel mandrel is compared. The residual stress field is shown to be strongly affected by the mandrel thermal expansion coefficient.
Subject
Materials Chemistry,Polymers and Plastics,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites
Reference18 articles.
1. Curing Stresses in Composite Laminates
2. Stango, R.J. and S.S. Wang 1982 "Process-Induced Residual Thermal Stresses in Advanced Fiber-Reinforced Composite Laminates," in Polymer Processing Analysis and Innovation, Nam R Suh, ed , New York, NY The American Society of Mechanical Engineers , p. 67
3. Process Modeling of Composite Materials: Residual Stress Development during Cure. Part I. Model Formulation
4. Process Modeling of Composite Materials: Residual Stress Development during Cure. Part II. Experimental Validation
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