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Nonlinear and multiphysics evaluation of residual stresses in coils

机译：线圈残余应力的非线性和多物理场评估

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This article deals with residual stress evaluation within the framework of numerical simulation of the coiling process of steel. Plastic deformations along with multiphase transitions are responsible for large irreversible strain leading to major residual stress issues. A nonlinear mixed analyticalumerical approach is developed to compute residual stresses generated by different contributions of inelastic strain occurring during the coiling process (including both winding and cooling). In particular, transformation-induced plasticity is taken into account. Contact stresses at the interfaces between layers are updated at each time step by a minimization procedure. The analytical part of the proposed strategy is validated by comparison with a finite element computation. Then a coil composed of 196 layers is considered under typical industrial conditions. Numerical results are discussed to present the industrial application of the proposed approach.
机译：本文在钢卷取过程的数值模拟框架内处理残余应力评估。塑性变形以及多相转变是导致不可逆大应变的主要原因，从而导致严重的残余应力问题。开发了一种非线性混合分析/数值方法，以计算在卷取过程（包括绕组和冷却）中发生的非弹性应变的不同贡献所产生的残余应力。特别是考虑到了由相变引起的可塑性。通过最小化过程在每个时间步更新层之间界面上的接触应力。通过与有限元计算进行比较，验证了所提出策略的分析部分。然后在典型的工业条件下考虑由196层组成的线圈。数值结果进行了讨论，以提出该方法的工业应用。

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