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首页> 外文期刊>International journal of mechanics and materials in design >Deformation-based accurate geometric model of stranded wire helical spring
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Deformation-based accurate geometric model of stranded wire helical spring

机译：基于变形的绞线螺旋弹簧精确几何模型

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摘要

As a kind of cylindrical spring structured with a helically wound strand, the stranded wire helical springs are widely employed as reset components in engineering fields. The accurate description of the spring geometry is critical for its design, manufacture, and further theoretical and finite element method (FEM) analysis. However, the outside wires of the spring were assumed to be double-helixes in commonly used geometric model without considering the interwire contact interactions, which introduced non-negligible geometric error. To cope with this problem, a deformation-based accurate geometric model considering the interwire contact interactions is presented in this paper. By combining the geometry constraints between wires with the thin rod theory and an elastic-plastic contact model, a novel algorithm is established to determine the interwire contact behaviors and the coordinates of the nodes on the wire centerlines iteratively. The FEM simulations and the experiments are performed to verify the effectiveness of the proposed model. The results show that the accuracy of the proposed model is similar to that of FEM but much higher than that of the commonly used geometric model. The effects of the strand curvature and the outside wire pitch on the spring geometry are analyzed with the presented model as well.
机译：作为具有螺旋缠绕股线的圆柱形弹簧，股线螺旋弹簧被广泛采用作为工程领域中的复位部件。弹簧几何形状的准确描述对于其设计，制造和进一步的理论和有限元方法（FEM）分析至关重要。然而，假设弹簧的外部导线是常用的几何模型中的双螺旋，而不考虑介绍的间隔接触相互作用，这引入了不可忽略的几何误差。为了应对这个问题，本文提出了考虑Interwire接触相互作用的基于变形的准确几何模型。通过将导线之间的几何约束与薄棒理论和弹性塑料接触模型相结合，建立了一种新的算法，以迭代地确定电线中心线上的节点的交互接触行为和坐标。进行有限元模拟和实验以验证所提出的模型的有效性。结果表明，所提出的模型的准确性类似于FEM，但远高于常用的几何模型的准确性。 STRAND曲率和外线间距对弹簧几何的影响以及呈现的模型分析。

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