Thermal buckling and nonlinear flutter behavior of shape memory alloy hybrid composite plates

Thermal buckling and thermal post-buckling behaviours of laminated composite plates are improved by embedding shape memory alloy wires within laminates of composite plates. The procedure is to use the recovery stress that is induced when the reverse transformation of the shape memory alloy from martensite to austenite phases is constrained. For aerospace applications where the source of the shape memory alloy heating is the high temperature environment itself, a study is conducted to see the effect of shape memory alloy in improving the thermal buckling and post-buckling of composite plates. Due to the temperature dependent nature of the composite matrix and the shape memory alloy, the finite element formulation developed here is in the incremental form. Solving this non-linear model using the developed in-house source code, critical loads are determined and the post-buckling paths of the shape memory alloy composite plates are traced. This study shows that by embedding the shape memory alloy within composite plates, the thermal buckling and post-buckling behaviours of composite plates can be improved substantially.

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Shape Memory Alloy Hybrid Composite Plates for Shape and Stiffness Control

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x07077901 ◽

2007 ◽

Vol 19 (5) ◽

pp. 609-619 ◽

Cited By ~ 29

Author(s):

Federica Daghia ◽

Daniel J. Inman ◽

Francesco Ubertini ◽

Erasmo Viola

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Hybrid Composite ◽

Composite Plates ◽

Stiffness Control

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The Instability Improvement of the Shape Memory Alloy Composite Plates Subjected to In-Plane Parabolic Temperature Distribution

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.554.32 ◽

2014 ◽

Vol 554 ◽

pp. 32-36 ◽

Cited By ~ 1

Author(s):

Z.A. Rasid ◽

R. Zahari ◽

Amran Bin Ayob

Keyword(s):

Temperature Field ◽

Shape Memory Alloy ◽

Shape Memory ◽

Composite Plates ◽

Thermal Buckling ◽

Recovery Stress ◽

Uniform Temperature ◽

Source Codes ◽

Temperature Distributions ◽

Post Buckling

The designs of thin structure components of aerospace vehicles require the consideration of thermal buckling and post-buckling problems. Thermal buckling of the structures in the aerospace environment may occur due to non-uniformly distributed temperature field. A finite element method study on the post-buckling of composite plates with embedded shape memory alloy wires was conducted. The plates were subjected to in-plane and through-thickness non-uniform thermal loadings where the non-uniform temperature distributions considered were parabolic in-plane and linearly varying through-thickness thermal loadings that may act separately or in combination. Recovery stress induced by the shape memory alloy was exploited to improve the thermal buckling behaviours of the composite plates. A non-linear finite element model along with its source codes that considered the recovery stress of the shape memory alloy, the non-uniform temperature field, the temperature dependent properties of the SMA and the composite matrix were developed. The post-buckling paths that showed the effect of the shape memory alloy on the thermal post-buckling behaviour of composite plates were generated using the source codes. It was found that the strain energy tuning method of the shape memory alloy greatly improved the post-buckling behaviour of composite plates subjected to the non-uniform temperature distributions.

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