대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제24권5호
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  • Pages.1352-1361
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  • 2000
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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균질화법에 의한 다결정 형상기억합금의 기계적 거동 모델링

Modeling of the Mechanical Behavior of Polycrystalline Shape-Memory Alloys by a Homogenization Method

  • 발행 : 2000.05.01
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초록

We obtain a micromechanics-based Helmholtz free energy and then in the framework of irreversible thermodynamics, a kinetic relation, a martensitic nucleation criterion and the reorientation criterion of martensitic variants are obtained. These relations are valid for a three-dimensional proportional and non-proportional loadings and for a combination of mechanical and thermal loading. From the simulated pseudoelastic stress-strain relation of a single crystal with loading rate effect, polycrystalline behavior in case of proportional and non-proportional loading is predicted by a homogenization method. The obtained results are compared quantitatively with experimental results.

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참고문헌

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