Coupled Thermal-Mechanical Progressive Damage Model with Strain and Heating Rate Effects for Lightning Strike Damage Assessment
Coupled Thermal-Mechanical Progressive Damage Model with Strain and Heating Rate Effects for Lightning Strike Damage Assessment
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DOI：
10.1007/s10443-019-09789-z
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发表时间：
2019-11
影响因子：
2.3
通讯作者：
S. Millen;A. Murphy;G. Catalanotti;G. Abdelal
中科院分区：
文献类型：
--
作者：
S. Millen;A. Murphy;G. Catalanotti;G. Abdelal
本文提出了一个渐进损伤模型，包括应变和加热速率的影响，预测复合材料试样的损伤所造成的模拟雷击试验条件。一个成熟和强大的定制故障模型已经开发出来。该方法使用比例因子方法和非线性退化模型，从出版的作品修改材料的模量，强度和刚度属性，以反映组合应变和热负荷的影响。Hashin/Puck失效准则在材料的渐进损伤建模之前使用。根据适当的文献对该方法的每个组分进行基准测试。一个三阶段的建模框架进行了演示，其中的初始等离子体模型预测试样表面负载（电，热，压力）;热电耦合模型预测试样温度导致的电负载;和第三，动态，耦合温度位移，明确的模型预测材料状态由于热负载，所产生的热膨胀和闪电等离子体施加的压力负载。给出了两种SAE雷电试验波形（B和A）的无保护试样损坏结果;结果说明了热和机械损坏行为如何随波形持续时间和峰值电流而变化。
This paper proposes a progressive damage model incorporating strain and heating rate effects for the prediction of composite specimen damage resulting from simulated lightning strike test conditions. A mature and robust customised failure model has been developed. The method used a scaling factor approach and non-linear degradation models from published works to modify the material moduli, strength and stiffness properties to reflect the effects of combined strain and thermal loading. Hashin/Puck failure criteria was used prior to progressive damage modelling of the material. Each component of the method was benchmarked against appropriate literature. A three stage modelling framework was demonstrated where an initial plasma model predicts specimen surface loads (electrical, thermal, pressure); a coupled thermal-electric model predicts specimen temperature resulting from the electrical load; and a third, dynamic, coupled temperature-displacement, explicit model predicts the material state due to the thermal load, the resulting thermal-expansion and the lightning plasma applied pressure loading. Unprotected specimen damage results were presented for two SAE lightning test Waveforms (B & A); with the results illustrating how thermal and mechanical damage behaviour varied with waveform duration and peak current.