论文标题
钛皮肤面板的多尺度降低订购建模。
Multiscale Reduced-Order Modeling of a Titanium Skin Panel Subjected to Thermo-Mechanical Loading
论文作者
论文摘要
该手稿介绍了多尺度还原模型的配方，实现，校准和应用，以模拟与高速飞行相关的热机械负载的钛面板结构。该公式基于基于本征膜的降低均质均质化模型（EHM），并进一步考虑热应变以及依赖温度的材料特性和进化定律。材料微结构（即，在多晶代表性体积元件（RVE）和基础微观结构机制的尺度上，直接合并，并与结构分析完全耦合，从而可以在结构尺度和材料微观上并同时探测响应。使用一系列在广泛温度和两个不同的应变速率下的TI-6242S的单轴张力测试对所提出的方法进行了完全校准。然后采用校准模型来研究经过与高速飞行相关的热机械载荷的通用飞机皮面板的响应。该分析的重点是证明该模型不仅可以预测结构尺度响应的能力，还可以预测微观响应，并进一步研究温度和纹理对响应的影响。
This manuscript presents the formulation, implementation, calibration and application of a multiscale reduced-order model to simulate a titanium panel structure subjected to thermo-mechanical loading associated with high-speed flight. The formulation is based on the eigenstrain-based reduced-order homogenization model (EHM) and further considers thermal strain as well as temperature dependent material properties and evolution laws. The material microstructure (i.e., at the scale of a polycrystalline representative volume element (RVE)) and underlying microstructural mechanisms are directly incorporated and fully coupled with a structural analysis, allowing concurrently probing the response at the structural scale and the material microscale. The proposed approach was fully calibrated using a series of uniaxial tension tests of Ti-6242S at a wide range of temperatures and two different strain rates. The calibrated model is then adopted to study the response of a generic aircraft skin panel subjected to thermo-mechanical loading associated with high-speed flight. The analysis focuses on demonstrating the capability of the model to predict not only the structural scale response, but simultaneously the microscale response, and further studies the effects of temperature and texture on the response.
