Numerical Analysis on Thermal Stress of Multilayer Materials Combined Structures for a Lightweight Thermal Protection System

ZHANG Lang; LI Xue-wu; XIA Jian-zhong

doi:10.3879/j.issn.1000-0887.2013.07.009

Volume 34 Issue 7

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ZHANG Lang, LI Xue-wu, XIA Jian-zhong, . Numerical Analysis on Thermal Stress of Multilayer Materials Combined Structures for a Lightweight Thermal Protection System[J]. Applied Mathematics and Mechanics, 2013, 34(7): 742-749. doi: 10.3879/j.issn.1000-0887.2013.07.009

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Numerical Analysis on Thermal Stress of Multilayer Materials Combined Structures for a Lightweight Thermal Protection System

doi: 10.3879/j.issn.1000-0887.2013.07.009

¹Engineering Simulation and Aerospace Computing, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, P.R.China;²Department of Applied Mathematics, Northwestern Polytechnical University, Xi’an 710072, P.R.China

Received Date: 2013-05-14
Rev Recd Date: 2013-05-16
Publish Date: 2013-07-15

Abstract

Abstract

A design concept of using multilayer structure for the top face-sheet of a lightweight thermal protection system was proposed. To obtain the different structural performances, three schemes were considered according to the different stacking orders of two kinds of insulation materials. With the mechanical and thermal loads during aircraft reentry considered, internal thermal stress of the multilayer structure was simulated. Details of shear stresses, temperature of the bottom surface and y-direction displacement were obtained. The results show that the shear stresses occur at the edge area, and the distributions are anti-symmetrical along the midline. The usage of the materials with high thermal conductivity and heat capacity can reduce the temperature gradient and then the thermal stresses and deformation. With the uniform temperature field, the difference of the thermal expansion coefficients of two materials is positively related with the shear stress between the two materials. It is suggested that, there is a great potential of optimization design for the multilayer structure through different combinations of materials in different stacking orders.
- thermal protection,
- multilayer insulation structure,
- stacking order,
- material combination,
- thermal stress

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References(15)

References

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