上海交通大学学报

上海交通大学学报（自然版） ›› 2014, Vol. 48 ›› Issue (04): 532-537.

• 交通运输 • 上一篇    下一篇

超塑成形/扩散连接焊缝失效断裂仿真方法

柴象海1,2，张晓云3，史同承1,2
  

  1. (1. 中航商用航空发动机有限责任公司， 上海 200241； 2.上海商用飞机发动机工程技术研究中心， 上海 200241； 3. 上海交通大学 机械与动力工程学院， 上海 200240)
  • 收稿日期:2013-07-08
  • 基金资助:

    国家自然科学基金（51205377），航空科学基金（2012ZBN2003），上海市科委基础研究重大项目（12DJ400500），上海市科委自然科学基金（13ZR1422300） 资助

Simulation Method for Bonding Seam Failure of  Superplastic Forming and DiffusionBonded Structures

CHAI Xianghai1,2,ZHANG Xiaoyun3,SHI Tongcheng1,2
  

  1. (1. AVIC Commercial Aircraft Engine Co. Ltd., Shanghai 200241, China; 2. Shanghai Engineering Research Center of Civil Aero Engine, Shanghai 200241, China; 3. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
     
  • Received:2013-07-08

摘要：

针对采用超塑成形/扩散连接工艺加工的3层瓦伦空心结构钛合金空心风扇叶片的焊缝强度通常低于材料本体强度且受零部件几何特征影响显著的特点，提出采用带失效的固连连接方式.通过剪切失效和拉伸失效模拟焊缝物理特性的建模和仿真分析方法，以及与空心风扇叶片相同加工工艺、相同结构形式的空心平板试验件的靶板冲击试验，首先建立焊缝失效模型，标定了焊缝强度，然后将数值仿真结果与试验数据相比较，验证该方法的有效性.结果表明，所提出的超塑成形/扩散连接结构仿真分析方法能够为航空发动机3层瓦伦空心结构零部件瞬态动力学分析提供参考.

 

关键词: 航空发动机, 超塑成形, 扩散连接, 瓦伦结构, 数值仿真

Abstract:

In view of the fact that weld strength is usually lower than the material strength, and geometric characteristics of parts is affected by the significant features
when using the superplastic forming and diffusion-bonded process to build the hollow warren thin wall structures, and based on the study of the deformation of diffusion bonding components and failure mechanism of bonding seam, this paper proposed a novel method in which thick shell elements were used to model diffusion bonded components. Moreover, the tied contact with failure mode was used to model bonding seam physical properties, and its strength parameters were related to geometric characteristics. The impact tests of hollow warren thin wall structures based on superplastic forming were performed, and numerical simulation results were compared with the test data. The results show that the method proposed in this paper can be used for dynamic analysis of model bonded hollow warren structures.

Key words: aero engine, superplastic forming, diffusion bonding, warren structure, numerical simulation

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