摘要
基于双金属复合管的液压胀合原理,计算出L360QS碳钢管/Incoloy825镍基合金管液压胀合的最小胀合压力Pimin=46.84MPa、最大胀合压力Pimax=51.67MPa。采用ABAQUS有限元确定了解析最小胀合压力与残余接触应力Pc＊,并通过液压胀合试验进行了验证对比。结果表明,有限元确定的解析最小胀合压力为47.45MPa,与理论计算值Pimin较吻合;模拟最大胀合压力Pimax卸载后的管间残余接触应力Pc＊=0.98MPa;通过液压胀合试验,采用推出法测定并计算管段长度分别为200mm和50mm时的管间残余接触应力为0.7MPa和0.65MPa,略小于有限元模拟结果,这是由实际管体的椭圆度、内外管间隙不均匀等原因造成。
For the L360QS/Incoloy825 nickel base alloy hydraulic expansion pipe,by analyzing the hydraulic pressure expansion principle of double metal composite tube,the minimum expansion pressure Pimin of 46.84 MPa and the maximum expansion pressure Pimax of 51.67 MPa can be calculated.Also,by using ABAQUS finite element method（FEM）,the minimum expansion pressure and the residual contact pressure Pc＊ can be obtained and verified by hydraulic bulge test.The results show that the predicted minimum expansion pressure by FEM is 47.45 MPa,which is consistent with the theoretical calculation result.The simulated residual contact stress between the tube is 0.98 MPa after unloading,which is slightly larger than the experimental ones.The reason is attributed to the actual ovality of the pipe body and the uneven clearance inside and outside the pipe.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2016年第1期131-135,共5页
Journal of Plasticity Engineering
基金
国家高技术研究发展863计划资助项目(2013AA031303)
关键词
双金属复合管
液压胀合
有限元
残余接触压力
double metal clad pipe
hydraulic expansion
finite element
residual contact stress
