摘要
通过大量小直径管弯曲成形试验,分析了弯管壁厚方向的应变分布状态,指出管壁厚变形主要受材料力学性能和变形几何因素的影响,沿弯曲线呈非均匀分布,最大减薄和增厚量均产生在弯曲内角中部。推导出限制弯管壁厚变化量的许用最小弯曲半径公式,经试验验证具有一定的实用价值。
Through a great deal of small-diameter tube bending-deformation test, the strain distribution state of the tube in the direction of wall thickness is analyzed. It is pointed out that the deformation of wall thickness is affected mainly by mechanical property of material and geometry factors of deformation, and its distribution along bending line is uneven. Both maximum thinning and thicking occurred in the middle of bending inner corner. At last, the formulation of allowable minimum bending radius limiting the change of the tube-wall thickness is derived, and proved to be of practical value.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2005年第2期58-60,77,共4页
Journal of Plasticity Engineering
基金
北京市重点学科基金项目(XK00070424)
关键词
小直径管
弯曲成形
壁厚变形
最小弯曲半径
small-diameter tube
bending deformation
wall thickness deformation
minimum bending radius
