摘要
研究了金属管材在高温软化和轴向压力作用下的局部屈曲变形行为,实现了304不锈钢波纹管的热屈曲成形。通过二次开发的DFLUX和FILM子程序在Abaqus软件上模拟了实验过程中的感应加热和喷气冷却作用,建立了金属波纹管热屈曲成形有限元模型。通过对比测温点温度及波纹高度的模拟值与实测值,验证了所建立的模型具有良好的计算精度。在此基础上,应用该模型计算了加热宽度对成形结果的影响,结果表明,随着加热宽度的增加,波纹管高度和壁厚分别有小幅度上升和下降,采用热屈曲技术成形的波纹管未出现减薄现象,且整个波纹轮廓上波峰位置处壁厚最大。
The local buckling deformation behavior of metal tube under the action of high temperature softening and axial pressure was studied. The thermal buckling forming of 304 stainless steel bellows was realized. Through the secondary developed DFLUX and FILM subprograms,the induction heating and air cooling during the experimental process were simulated using Abaqus softwere,and the finite element model of thermal buckling forming of metal bellows was established. By comparing the simulated and measured values of temperature at temperature measuring point and wave height,the established model was proved to have good calculation accuracy. On this basis,the effect of heating width on forming results was calculated using this model. The results show that with the increase of the heating width,the height and wall thickness of the bellows increase and decrease slightly,respectively. And no thinning phenomenon appears in the bellows formed by thermal buckling technology,and the wall thickness is the largest at the wave peak on the whole outline.
作者
丁子祈
何乃辉
韩先洪
DING Zi-qi;HE Nai-hui;HAN Xian-hong(National Engineering Research Center of Die&Mold CAD,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200030,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2020年第11期109-114,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51775336)。
关键词
金属波纹管
热屈曲
有限元模型
加热宽度
metal bellow
thermal buckling
finite element model
heating width
