摘要
介绍一种钢丝弯曲疲劳试验,分析已知原理中存在的问题。通过变形几何方程、Hook定律以及材料力学假设等,推导出钢丝弯曲疲劳试验中最大弯曲应力的正确形式:在试验钢丝长度为钢丝直径的150倍时,钢丝的最大弯曲应力是钢丝弹性模量与弯曲弧度乘积的1/300。在钢丝(或钢丝绳)的实际弯曲问题中,必须考虑弯曲直径的大小,确保试验中钢丝的弯曲直径等参数一致。
To introduce a kind of steel wire bending fatigue lest. The problem existing in known theory is analyzed. The maximum bending stress corrective form in steel wire bending fatigue test derived through deformation geometric equations, Hook law and material mechanics hypothesis etc. is as following： when tested steel wire length is 150 times of steel wire di- ameter, the maximum bending stress equals the product of 1/300 of steel wire elasticity modulus multiple bending radian. Bending diameter should be considered to assure the consistent parameters of bending diameter in the steel wire or wire rope actual bending questions.
出处
《金属制品》
2011年第3期73-74,共2页
Metal Products
关键词
旋转弯曲试验
疲劳
弯曲应力
rotary bending test
fatigue
bending stress
