锻压技术

刚模热胀形TC1半球零件试验与数值模拟研究

英文标题：Experimental research and numerical simulation of hot bulging tests for TC1 hemisphere part

作者：肖军杰李东升李小强金朝海黎俊麟

单位：北京航空航天大学

分类号：TG386

出版年,卷(期):页码：2011,36(6):11-14

摘要：

为研究室温难成形TC1钛板的高温成形能力，对TC1钛板半球零件在700℃进行了刚模胀形试验。研究了在TC1表面涂敷不同种类、不同浓度涂料、保持高温环境下钛板表面的抗氧化能力，确定了热胀形试验的工艺条件和参数；采用Dynaform软件，基于TC1高温单拉试验的真实应力应变曲线和高温性能参数，选用36*MAT3_PARAMETER_BARLAT模型对TC1半球零件进行了刚模热胀形过程数值模拟。最后，对热胀形TC1半球零件的试验结果和模拟结果从厚度减薄率和主次应变两方面进行比较，发现两者基本吻合，验证了所选模型对钛板高温成形模拟的有效性和准确性。

The rigid die bulging experiment for TC1 sheet was carried out at 700℃ to investigate the forming ability of TC1 at elevated temperature. The resistance to oxidation of the titanium sheet was studied at the different kinds and consistency dopes coating in different heating times. The process conditions and parameters of the rigid die hot bulging of the titanium sheet were determined. Using 36*MAT3_PARAMETER_BARLAT model, the rigid die hot bulging TC1 sheet hemisphere part was simulated by DYNAFORM utilizing the true stress-strain curve and the property parameters which came from the uniaxial tensile test at 700℃. Finally, the experimental results were compared with the simulated results in two aspects: the thinning rate and the strains. The comparison shows that they are basically agreed with each other. This verifies the validity and accuracy of the simulation of the high temperature forming for titanium sheet with the chosen material model.

基金项目：

航空科学基金资助项目（2010ZE51050）；中国博士后科学基金特别资助项目（201003038）；中央高校基本科研业务费专项资金资助项目（YWF-10-01-B08）;国家自然科学基金资助项目(51175022)

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