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一種形狀記憶合金的本構(gòu)模型及其應(yīng)用
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TG139.6

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SupportedbytheNationalNaturalScienceFoundationofChina50005016


Constitutive Relationship and Applications of Shape- memory Alloys
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    摘要:

    建立1種本構(gòu)模型，用于研究形狀記憶合金(SMA)結(jié)構(gòu)和復(fù)合材料的力學(xué)響應(yīng)。首先，該本構(gòu)模型在單軸應(yīng)力狀態(tài)和多軸應(yīng)力狀態(tài)下得到考核；其次，給出了移植到ABAQUS的用戶(hù)子程序umat的求解格式。利用有限元方法分析了SMA的CT(緊湊拉伸)和TPB(三點(diǎn)彎曲)試樣以及SMA-纖維增強(qiáng)復(fù)合材料和常規(guī)金屬合金增強(qiáng)SMA基復(fù)合材料的力學(xué)響應(yīng)。在CT和TPB裂紋前端，有不同的相變規(guī)律，SMA復(fù)合材料的相變?nèi)Q于應(yīng)力狀態(tài)和兩相材料的材料性質(zhì)等。

    Abstract:

    A constitutive relationship has been applied to study the behavior of str uctures and composites of the shape-memory alloy(SMA).The predictability of the constitu tive relationship is confirmed by th e uniaxial and multiaxial examples.The paper gives out the finite element algorithmic implementations,which is appl ied to implement as umat of ABAQUS.As two kinds of applications,CT(compact tensile)and TPB(three point bending)specimens and SMA-fiber reinforced metal matrix and met-al-fiber reinforced SMA-matrix com posites are analyzed.The different distributions of martensite fracti on of the CT specimens and TPB-specimens made of SMAs are expla ined by the different stress characteristics ahead the cracks.The relative study on the SMA composites shows that the bulk mechanic behavior depends on the volume of SMA and the non-SMA matrix /fiber pro perties.

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岳珠峰 萬(wàn)建松 張慶茂.一種形狀記憶合金的本構(gòu)模型及其應(yīng)用[J].稀有金屬材料與工程,2003,(4):246~249.[Yue Zhufeng, Wan Jiansong, Zhang Qingmao . Constitutive Relationship and Applications of Shape- memory Alloys[J]. Rare Metal Materials and Engineering,2003,(4):246~249.]
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