Numerical Simulation of In-plane Tensile Properties of High-Strength Steel Wire Mesh
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摘要:
采用高强钢丝编织的格栅网在边坡浅层地质灾害和军事工程防护领域均有着广泛的应用. 由于影响格栅网面内力学性能的参数较多，精细化的数值分析可为优化格栅网的制备工艺充分发挥其力学性能提供依据. 为此，基于ANSYS Mechanical模块，在格栅网力学性能理论研究基础上，考虑钢丝材料的非线性应力强化效应、格栅网几何构造形成的各向异性以及连接节点处编织工艺造成的接触和状态非线性等因素，开展了格栅网面内拉伸力学性能的非线性数值分析. 结果表明：数值计算与试验获得的格栅网应力应变变化趋势基本一致；与试验结果相比，数值计算获得的格栅网等效弹性模型（刚度）在
Y 方向误差为10.6%，X 方向误差为18.5%；数值计算获得的格栅网极限应力应变在Y 方向误差分别为10.0%和12.8%，在X 方向误差分别为0.7%和18.3%.Abstract:The mesh woven with high-strength steel wires are widely used in fields of shallow geological disasters of slope and military engineering protection. As there are many weaving process parameters that affect the in-plane mechanical properties of the mesh, a refined numerical analysis can provide a basis for optimizing the mesh preparation process to give full play to its mechanical properties. Based on ANSYS Mechanical module and theoretical study of the mechanical properties of the mesh, a nonlinear numerical analysis of the mechanical properties of the wire mesh in plane tension was carried out taking into consideration the nonlinear stress strengthening effect of the steel wire material, the anisotropy formed by the geometric structure of the mesh, and the contact and state nonlinearity caused by the weaving process at the connection nodes of the mesh. Results show that the variation trend of stress and strain of the mesh obtained by numerical calculation is basically consistent with that obtained by experiment. Compared with the experimental results, the error of the equivalent elastic model (stiffness) of the mesh obtained by numerical calculation is 10.6% in the
Y direction and is 18.5% in theX direction. The errors of ultimate stress and ultimate strain obtained by the numerical calculation are 10.0% and 12.8% in theY direction and are 0.7% and 18.3% in theX direction, respectively.-
Key words:
- high-strength steel wire /
- wire mesh /
- equivalent elastic modulus /
- non-linearity /
- numerical simulation
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图 2 高强钢丝真应力-真应变关系曲线
Figure 2. Stress-strain relation curve of the high strength steel wire
图 6 钢丝连接部位节点耦合和接触对设置
Figure 6. Node coupling and contact setting of steel wire intersection
图 8 失效单元在Y方向拉伸过程中的平均等效Von. Mises应力随拉伸应变的变化关系
Figure 8. Relation curve of the equivalent (Von. Mises) stress of failure element with the tensile strain in the Y-direction tensile process
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