Thermal Stresses in Anisotropic Multilayered Structures
Bimetal thermostats and multilayered beams and laminates are often subjected to severe interfacial stresses under mechanical and temperature loads. According to the predictions of the linear theory of elasticity, mismatches in the elastic properties of two adjacent layers generally result in a stress singularity at the intersection of their interface with a free edge.1–4 The intense but localized peeling and shearing action near the free edge may initiate interfacial fracture and may lead to failure of the component. Such adverse conditions can sometimes be avoided or rendered less harmful by rearranging the layers or by altering certain geometrical parameters. This requires, however, efficient and accurate analytical methods for determining the interlaminar stresses across all interfaces of a layered beam or laminate under various mechanical and thermal loads.
KeywordsThermal Stress Stress Function Free Edge Temperature Load Laminate Beam
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- 6.Stango, R. J., and S. S. Wang, “Process-induced Residual Thermal Stresses in Advanced Fiber-reinforced Composite Laminates,” ASME J. Engr. for Power, 106, 1984, pp. 48–54.Google Scholar
- 8.Glaser, J. C., “Thermal Stresses in Compliantly-Jointed Materials,” ASME Winter Annual Meeting, Paper No. 89-WA/EEP-14, San Francisco, CA, December 1989.Google Scholar
- 9.Kuo, A.-Y., and K.-L. Chen, “Thermal Stresses at the Edge of a Multi-layered Composite Strip,” Paper presented in ASME Winter Annual Meeting, December 1992, Atlanta, GA.Google Scholar
- 16.Yin, W.-L., “Free-edge Effects in Laminates Under Extension, Bending and Twisting, Part I: A Stress Function Approach,” Proc. AIAA/ASME/ASCE/AHS/ ASC 32nd Structures, Structural Dynamics and Materials Conference, April, 1991, Baltimore, MD, pp. 985–995.Google Scholar
- 17.Lekhnitskii, S. G., Theory of Elasticity of an Anisotropic Elastic Body, Holden-Day, San Francisco, 1963.Google Scholar
- 18.Jones, R. M., Mechanics of Composite Materials, McGraw-Hill, New York, 1975.Google Scholar
- 19.MACSYMA Refernce Manual, Version 13. Symbolics, Inc., Burlington, MA, 1988.Google Scholar
- 20.Wolfram, S., Mathematica: A System for Doing Mathematics by Computer, 2d edn. Addison-Wesley, Redwood City, CA, 1990.Google Scholar
- 23.Yin, W.-L., “Free-edge Effects in Laminates Under Extension, Bending and Twisting, Part II: Sublaminate/Layer Modeling and Analysis,” Proc. AIA A/ ASME/ASCE/AHS/ASC 33rd Structures, Structural Dynamics and Materials Conference,April, 1992, Dallas, TX, pp. 48–58.Google Scholar
- 24.Yin, W.-L., Free-Edge Effects in Laminates Subjected to Hygrothermal Loading. Final Report, Contract NAS1–17925, Task Assignment No. 10, Lockheed Aeronautical Systems Co., Marietta, GA, March 1992.Google Scholar