基于局部应力调整航空整体结构件变形校正理论和方法研究

项目名称： 基于局部应力调整航空整体结构件变形校正理论和方法研究

项目编号： No.51275277

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 孙杰

作者单位： 山东大学

项目金额： 80万元

中文摘要： 航空整体结构件的数控加工变形是加工过程中各种应力耦合、演变及在新刚度条件下平衡的综合作用结果。基于此，研究局部滚压产生的微塑性与滚压应力层实现航空整体结构件总体变形校正的理论、方法和工艺实现。为此，首先揭示毛坯初始残余应力与加工应力耦合作用机理以及随加工过程进行的演变规律，建立工件的应力状态-刚度-变形之间的关系模型；进而揭示局部微塑性/应力层诱导工件总体应力状态改变与尺寸、形状变化的材料、力学学本质，研究变形校正滚压作用区的确定准则，建立局部滚压作用引发宏观校正力矩的计算理论和方法，构建特定结构工件滚压工艺参数与校正量之间的映射关系，创建变形校正工艺参数确定的综合决策理论。完成基于滚压力在线监测闭环控制的滚压校正装置开发。通过本项目研究，形成基于局部微塑性层/应力调整实现框、梁、壁板等航空整体结构件总体变形校正新的工艺理论和方法，为大飞机、先进战机中整体结构件的精密制造提供有力保障。

中文关键词： 航空整体结构件；变形校正；变形预测；滚压；残余应力

英文摘要： NC machining distortion of aviation monolithic components is the results from the join effects of stresses coupling, evolution and equilibrium under new rigidity condition during the production process. Based on this consideration, correcting theory, method and technological process to correct the overall distortion of the monolithic components is to be investigated, it is based on the application of burnishing which can induce micro plastic and stress. In this project, the coupling mechanism and developing regularity of the bulk residual stress and machining stress in pace with machining process is to be revealed firstly; accordingly, the relational model of final residual stress status, rigidity, machining distortion of the aviation monolithic component will be established. The material and mechanics nature which causes the overall alternation of the component's shap and stress status by the local burnishing induced local micro plastic/stress layer will be revealed further. Determination principle of the burnishing acting zone which can accomplish the overall distortion correcting is to be studied. Theory and method to calculate the integrated correcting moment caused by burnishing induced micro plastic deformation layer and stress layer is to be formed. The mapping relationship among burnishing correcting p

英文关键词： aerospace monolithic component；distortion correction；distortion prediction；rolling；residual stress