Control of sonic fatigue for high-speed flight vehicles using shape memory alloys

Mei, Chuh; Zhong, Z. W.; Turner, Travis L.

doi:10.1117/12.310666

Cited by 3 publications

(1 citation statement)

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“…The formulation by Turner, Zhong, and Mei (1994), based upon the RSM of the SMA constitutive behavior, corroborates the results presented here. A different result was reported in Mei, Zhong, and Turner (1998) where an incremental approach with many temperature increments was deemed necessary to account for the SMA material nonlinearity in arriving at the final temperature. That formulation is also based upon the RSM, but does not exhibit the complete elimination of thermal post-buckling deflection for cases with A s greater than ambient.…”

Section: Resultsmentioning

confidence: 92%

A New Thermoelastic Model for Analysis of Shape Memory Alloy Hybrid Composites

Turner

2000

Journal of Intelligent Material Systems and Structures

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A constitutive model and a finite element formulation are developed for predicting the thermomechanical response of SMA hybrid composite structures subjected to combined thermal and mechanical loads. The constitutive model is valid for constrained, restrained, or free recovery behavior with appropriate measurements of basic SMA material properties. The model captures the material nonlinearity of the SMA with temperature and more accurately captures the mechanics of composites with embedded SMA actuators as compared to other recently developed approaches. The constitutive and finite element models are amenable to commercial code implementation. The fundamental thermoelastic behavior of such structures is described in physical terms and related to the governing equations. It is shown that alloy selection is imperative for achieving the desired performance with respect to the application environment. It is also shown that fundamental efforts to strategically place actuators can produce dramatic performance improvements. Numerical results are shown for glass-epoxy beam specimens with embedded Nitinol actuators. Control of critical buckling temperature, thermal post-buckling deflection, and random response are demonstrated.

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Section: Resultsmentioning

confidence: 92%