文档介绍：
钛合金微观位错与整体结构件加工变形的
数学模型研究#
李明,杨勇,李奎荣**
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(青岛理工大学机械工程学院,山东青岛 266033)
摘要:针对航空整体结构件的加工变形问题仍停留在表面研究,尚未深入到位错运动学微观
层面上,在解决加工变形方面缺乏可靠的理论依据,提出了基于位错理论的微观位错与整体
结构件加工变形数学模型构建方法。本文以钛合金梁整体结构件为研究对象,根据位错动力
学理论建立了整体结构件加工变形的运动位错分布模型;通过位错滑移系统模型建立了整体
结构件最大塑性变形量与微观位错的理论数学关系。通过对该数学关系模型的分析表明:钛
合金梁整体结构件的最大塑性变形量发生在梁中间附近,且最大变形位置由基面滑移和柱面
滑移与工件端面之间的夹角确定;最大塑性变形量与已加工表面下不同深度处的应力场、加
工变形过程中位错的增殖强度以及工件的长度成正比,与工件的厚度成反比,且仅从宏观尺
寸上来看,工件的长度越长,厚度越小,工件的变形量越大。
关键词:钛合金;整体结构件;加工变形;位错;数学模型
中图分类号:TH16 TG54
Study on Mathematical Model between Dislocations of
Titanium Alloy and Machining Deformation of Monolithic
Component
LI Ming, YANG yong, LI Kuirong
(School of Mechanical Engineering, Qingdao Technological University,
ShanDong QingDao 266033)
Abstract: The problem concerning machining deformation of aerospace ponents
still remains in the surface study, not yet in-depth study in microscopic level of dislocation
kinematics, and its deformaton theory lacks of reliable theoretical basis in solving the machining
distortion. A construction method of mathematical model between dislocations and machining
distortion of ponent is presented based on dislocation theory. This paper puts
titanium alloy ponent as the research object. According to dislocation dynamics,
distribution model of moving dislocations in the process of machining deformation in titanium
alloy ponent wa