铝/钛复合管爆炸焊接三维数值模拟

3D numerical simulation on explosive welding of Al/Ti composite tube

复合管爆炸焊接在工艺上的差异性决定了其焊接过程与复合板焊接过程不同,而复合管爆炸焊接作用空间的相对密闭导致观察和分析其焊接过程的困难,通过软件AUTODYN模拟出了复合管爆炸焊接过程,在验证模型正确有效的基础上,分析了复合管射流产生以及结合界面波形结构的独特性,发现射流产生波状结合满足侵彻机理假说.对比爆炸焊接试验结果表明,模拟结果与试验结果具有良好的一致性,这为研究复合管波形结构以及射流形成机理等提供了重要手段.

The different explosive welding process of composite tube welding induces a different progress in welding process compared to the composite plate welding. The relatively confined space of the composite tube lead to difficulties in the observation of the welding process. This paper simulate the explosive welding process of composite tube through software AUTODYN. On the basis of the verification of the model,the formation of the jet and the unique structure of waveform interface were analyzed. The jet induced wavy bonding satisfies the penetrating mechanism hypothesis. The simulation results are in good agreement with the experimental results,which provide important information for the further study on the wave structure and jet formation mechanism of explosive welding.