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基于绳股结构特点、钢丝材料弹塑性及钢丝间的摩擦接触等因素,对三角型及圆型钢丝绳股弯曲力学性能进行分析,建立了上述两种类型钢丝绳股的有限元计算模型,并对具有相同捻角及总钢丝截面积的两类绳股的弯曲力学性能进行了对比分析.结果表明:纯弯曲载荷作用下,三角型和圆型钢丝绳股均表现出弹塑性力学特征,且弯矩对曲率的响应存在滞后现象;二者抗弯刚度分别以0.2%/(°)和0.8%/(°)的速率随捻角的增大而减小,且分别以22.3%/mm和15.5%/mm的速率随侧丝直径的增大而增大;二者von Mises应力分别以0.9%/mm和0.6%/mm的速率随侧丝直径的增大而增大,二者塑性变形分别以5.8%/mm和2.3%/mm的速率随侧丝直径的增大而增大;三角股的抗弯刚度、von Mises应力、总变形和塑性变形分别约为圆股的88.0%,89.3%,67.9%和74.6%.
Based on the structural characteristics of the strands, the elasto-plasticity of the steel wire and the frictional contact between the steel wires, the bending mechanical properties of the triangular and round steel wire strands are analyzed. The finite element calculation models of the two types of steel wire strands are established, The same twist angle and the total wire cross-sectional area of the two kinds of strands were analyzed.The results show that under the pure bending load, the triangular and round wire ropes show elastic-plastic mechanical characteristics, and the bending moment The bending stiffness of the two materials decreases with the increase of twist angle at the rates of 0.2% / (°) and 0.8% / (°), respectively. The bending stiffness of the two decreases by 22.3% / mm and 15.5% / mm. The von Mises stress of the two increases with the increase of the diameter of the side filaments at the rate of 0.9% / mm and 0.6% / mm, respectively. The plastic deformation of the two is 5.8 The rates of% / mm and 2.3% / mm increase with the increase of the side wire diameter. The flexural rigidity, von Mises stress, total deformation and plastic deformation of the triangle are about 88.0%, 89.3% and 67.9 % And 74.6%.