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An anisotropic in-plane and out-of-plane elasto-plastic continuum model for paperboard

机译：纸板的各向异性平面内和平面外弹塑性连续体模型

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A continuum model of paperboard material possessing a high degree of anisotropy is established. To handle the anisotropy, three vectors are introduced which phenomenologically represent the preferred directions of the material. The in-plane director vectors deform as line segments and the out-of-plane direction deforms as a normal vector. This allows for a decoupling of the in-plane and the out-of-plane responses in shearing. The model is developed for large plastic strains and consequently an expression for the plastic spin has been proposed. The choice of plastic spin allows for a control of the direction in which permanent deformations will occur. To show the predictive capabilities of the model, the important industrial process of creasing is simulated. Both the simplified line crease setup, as well as the actual rotation crease setup used in industrial applications are studied. (C) 2015 Elsevier Ltd. All rights reserved.
机译：建立了具有高度各向异性的纸板材料的连续模型。为了处理各向异性，引入了三个矢量，它们在现象学上代表了材料的优选方向。平面内指向矢矢量变形为线段，平面外方向变形为法线矢量。这允许剪切中的面内和面外响应解耦。该模型是针对大型塑性应变而开发的，因此提出了塑料旋转的表达式。塑料旋转的选择允许控制将发生永久变形的方向。为了显示模型的预测能力，模拟了重要的折痕工业过程。研究了简化的线折痕设置以及工业应用中使用的实际旋转折痕设置。 （C）2015 Elsevier Ltd.保留所有权利。

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