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Structural Engineering and Mechanics Volume 11, Number 4, April 2001 , pages 407-422 DOI: https://doi.org/10.12989/sem.2001.11.4.407 |
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Stress wave propagation in composite materials |
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Siyuan J. Shen, Jens C. Pfister and James D. Lee(U.S.A.)
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| Abstract | ||
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The linear constitutive relations and the failure criteria of composite materials made of thermoviscoelastic solids are presented. The post-failure material behavior is proposed and the dynamic finite element equations are formulated. However, a nonlinear term is kept in the energy equation because it represents the effect of the second law of thermodynamics. A general purpose nonlinear three-dimensional dynamic finite element program COMPASS is upgraded and employed in this work to investigate the interdependence among stress wave propagation, stress concentration, failure progression and temperature elevation in composite materials. The consequence of truthfully incorporating the second law of thermodynamics is clearly observed: it will always cause temperature rise if there exists a dynamic mechanical process. | ||
| Key Words | ||
| dynamic finite element analysis; second law of thermodynamics; thermo-mechanical coupling; thermoviscoelasticity; composite materials; wave propagation. | ||
| Address | ||
| Siyuan J. Shen, Jens C. Pfister and James D. Lee, Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, U.S.A. | ||