Thermomechanical Analysis of Functionally Graded Composites under Laser Heating by the MLPG Method
Thermomechanical Analysis of Functionally Graded Composites under Laser Heating by the MLPG Method
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DOI：
10.3970/cmes.2006.013.199
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发表时间：
2006-06
影响因子：
2.4
通讯作者：
H. Ching;J. K. Chen
中科院分区：
文献类型：
--
作者：
H. Ching;J. K. Chen
无网格局部Petrov-Galerkin（MLPG）方法是一种类似于有限元方法的新的数值方法，但它不需要定义单元就可以构造形函数和进行区域离散。在这项研究中，MLPG分析的瞬态热机械响应的功能梯度复合材料的高斯激光束加热。该复合材料被建模为一个2-D条，其中包括金属和陶瓷相的体积分数随厚度变化。采用两套细观力学模型分别计算了有效材料性能。数值结果的热机械响应在瞬态和稳态。对材料组分的空间分布和体积分数、激光功率的上升速率和激光束的半径进行了参数研究。关键词：无网格颗粒法，功能梯度材料，MLPG，热机械，激光加热。
The Meshless Local Petrov-Galerkin (MLPG) method is a novel numerical approach similar to finite element methods, but it allows the construction of the shape function and domain discretization without defining elements. In this study, the MLPG analysis for transient thermomechanical response of a functionally graded composite heated by Gaussian laser beams is presented. The composite is modeled as a 2-D strip which consists of metal and ceramic phases with the volume fraction varying over the thickness. Two sets of the micromechanical models are employed for evaluating the effective material properties, respectively. Numerical results are presented for the thermomechanical responses in both the transient and steady states. A parametric study with respect to the spatial distribution and volume fraction of material constituents, the rising rate of the laser power, and the radius of the laser beam is conducted. keyword: Meshless Particle Method, Functionally Graded Materials, MLPG, Thermomechanics, Laser Heating.