摘要
针对粘性介质压力成形过程是粘性介质与板材耦合的变形过程,不易确定板材在粘着应力作用下变形行为的情况,自行设计了粘性附着力拉伸试验装置,将粘着应力作为板材拉伸力,直接测量粘着应力对板材变形的作用。采用聚甲基乙烯基聚合物作为成形传力介质,初步研究了粘性附着力拉伸过程板材受到的粘性介质粘性附着力对板材变形的影响以及粘性附着力的影响因素。试验结果表明,增大板材表面压力差、提高粘性介质流动速度及提高粘性介质压力有利于提高粘性附着力的作用。研究结果可为合理利用粘性附着应力作用,提高板材成形性提供理论基础。
Because of the coupled deformation characteristic between viscous medium and sheet metal, however, it is difficult to analyze the deformation behavior of sheet metal under the interaction of viscous adhesive stress. Based on the above situation, viscous medium tensile test is carried out by using a kind of polymethylvinylpolymer as viscous pressure-carrying medium. Using the viscous adhesive stress as tensile stress, sheet metal deformation can be measured directly. The influence of viscous adhesive stress on the deformation of sheet specimen is investigated and some effect factors of viscous adhesive stress are analyzed preliminarily. Experimental results show that the viscous adhesive stress increases with an increasing of pressure difference on the surface of sheet metal, flowing velocity and hydrostatic pressure of viscous medium. Researchcesults provide a good foundation for utilizing viscous adhesive stress to improve the formability of sheet metal in viscous pressure forming.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2006年第10期146-150,共5页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(50275035)
关键词
粘性介质压力成形
粘性附着力
耦合变形
Viscous pressure forming （VPF）, Viscous adhesive stress, Coupled deformation
