首页> 外文会议>International Mechanical Engineering Congress and Exposition 2007 >FINITE ELEMENT ANALYSIS ON THE BEHAVIOR OF LAMINATED COMPOSITE SHELLS WITH EMBEDDED SHAPE MEMORY ALLOY WIRES
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FINITE ELEMENT ANALYSIS ON THE BEHAVIOR OF LAMINATED COMPOSITE SHELLS WITH EMBEDDED SHAPE MEMORY ALLOY WIRES

机译:形状记忆合金丝叠层复合材料壳行为的有限元分析

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Motivated by needs such as those in the aerospace industry, this paper demonstrates the thermomechanical characteristics of static and dynamic (frequency) behaviors of laminated composite shells with embedded shape memory alloy (SMA) wire subjected to temperature environments. Numerical analysis for SMA fiber reinforced composite laminates is performed by synergizing finite element method with Brison's model [1,2] of SMA constitutive law. A nonlinear finite element procedure with respect to shape memory alloy hybrid composite (SMAHC) shell has been developed which incorporates a thermodynamically derived constitutive law for SMA behavior. Present illustrative applications involve rectangular laminated panels clamped along one side, although the method is applicable to more complicated laminates, geometries and boundary conditions. Panel geometry is discretized into specially-developed 3D degenerated eight-node laminated composite shell elements. General shell theory, involving incremental nonlinear finite element equilibrium that includes large deformations with Green-Lagrange strains, is employed. Several test cases which depend on volume fraction of SMA, temperature and ply angles are presented to illustrate the thermomechanical behavior of SMAHC. The results of numerical analysis show the ability of the suggested procedure to compute the thermomechanical behavior of SMAHC due to SMA's internal phase transformations with stress and temperature
机译:受航空航天业等需求的驱使,本文演示了温度条件下嵌入形状记忆合金(SMA)线的层压复合材料壳的静态和动态(频率)行为的热机械特性。 SMA纤维增强复合材料层合板的数值分析是通过将有限元方法与SMA本构律的Brison模型[1,2]协同进行的。已经针对形状记忆合金混合复合材料(SMAHC)壳体开发了非线性有限元程序,该程序结合了用于SMA行为的热力学本构定律。尽管该方法适用于更复杂的层压板,几何形状和边界条件,但当前的说明性应用涉及沿一侧夹持的矩形层压板。将面板的几何形状离散化为专门开发的3D退化的八节点层压复合壳单元。采用了一般的壳理论,该理论涉及增量非线性有限元平衡,该平衡包括Green-Lagrange应变引起的大变形。提出了几个取决于SMA体积分数,温度和帘布层角度的测试案例,以说明SMAHC的热机械行为。数值分析结果表明,由于SMA的内部相变随应力和温度的变化,建议的程序具有计算SMAHC的热机械行为的能力。

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