《金属基复合材料残余应力分析》导师批注论文.docVIP

金属基复合材料残余应力的分析（） 摘 要 金属基复合材料(MMC}有两种形式的热应力，一种是在MMC中由于温度梯度引起的热应力.即温度梯度诱导的热应力；另一种是在冷却过程中由于基体金属和纤维的热膨胀系数不匹配引起的热应力，即热膨胀系数不匹配诱导的热应力。显然，热膨胀系数不匹配诱导的热应力是金属基复合材料的一大特征，因为对于大多数金属基复合材料来说，热膨胀系数不匹配是很严重的。 利用ANSYS软件模拟纤维体积分数对金属基复合材料热残余应力的影响。结果表明，（后面写出你的主要结论） 鉴于当前钛基复合材料中钛基体的多样性，我们将在各种类型的钛合金和钛铝金属间化合物中，挑选出较为典型的作为研究对象，利用本文得到的较为理想的复合材料加工和热处理工艺参数，逐一模拟它们的残余热应力，找到残余热应力分布较为理想的钛基体，并且，希望能够寻找到材料性能与热残余应力的相互关系，为钛基复合材料基体的选择提供一定的理论指导。 关键字：钛基复合材料，纤维体积分数，热残余应力，有限元分析 Abstract Two kinds of thermal residual stresses exist in metal matrix composites(MMC)‘One of them is temperature gradient induced thermal stresses caused by temperature gradient in MMC.The other can develop upon cooling from the processing temperature to room temperature due to the coefficient of thermal expasion(CTE} mismatch between the fiber and matrix and is called CTE mismatch induced thermal stresses. Dbviously,CTE mismatch induced thermal stresses is one of the biggest characteristic in MMC because CTE mismatch is usually very serious in most of MMC.5o this question must be solved at first.. we on the heat generation and residual stress of thermal residual stress on the material mechanics performance, the influence of deformation, the structure of the organization made analysis. Then respectively by ANSYS simulation substrate material in ideal elastic stress state and ideal elastic-plastic stress condition, Fiber volume fraction of metal matrix composites thermal stress influence. In view of the current titanium matrix composites matrix of the diversity of titanium, we will be in various types of titanium and titanium aluminium intermetallic, choose a relatively typical as the research object, using the paper got the ideal composite material processing and heat treatment process parameters, they each simulation residual heat stress, find residual thermal stress distribution titanium matrix ideal, and, hoping to find the material properties and the relationship between thermal residual stress of titanium matrix composites matri