钛蒙皮壁板热机械载荷下的多尺度降阶建模
Multiscale Reduced-Order Modeling of a Titanium Skin Panel Subjected to Thermo-Mechanical Loading
摘要：
本文介绍了多尺度降阶模型的制定、实现、标定和应用，以模拟钛板结构承受与高速飞行相关的热机械载荷。该公式是基于本征应变的降阶均匀化模型（EHM），并进一步考虑热应变以及温度依赖的材料性能和演化规律。材料微观结构（即，在多晶代表性体积单元（RVE）的尺度下）和底层微结构机制直接结合并与结构分析完全耦合，从而允许同时探测结构尺度和材料微尺度下的响应。所提出的方法是完全校准使用一系列的单轴拉伸试验的Ti-6242 S在很宽的温度范围和两个不同的应变率。然后，采用校准模型来研究与高速飞行相关的热机械载荷下的一般飞机蒙皮壁板的响应。分析的重点是证明该模型不仅预测结构尺度响应的能力，但同时微尺度响应，并进一步研究温度和纹理的响应的影响。
英文摘要：
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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
