This paper introduces a simple method for simulating highly anisotropic elastoplastic material behaviors like the dissolution of fibrous phenomena (splintering wood, shredding bales of hay) and materials composed of large numbers of irregularly‐shaped bodies (piles of twigs, pencils, or cards). We introduce a simple transformation of the anisotropic problem into an equivalent isotropic one, and we solve this new “fictitious” isotropic problem using an existing simulator based on the material point method. Our approach results in minimal changes to existing simulators, and it allows us to re‐use popular isotropic plasticity models like the Drucker‐Prager yield criterion instead of inventing new anisotropic plasticity models for every phenomenon we wish to simulate.

中文翻译：

---

动画各向异性弹塑性材料的实用方法

本文介绍了一种模拟高度各向异性弹塑性材料行为的简单方法，例如纤维现象（木头碎裂、干草切碎）和由大量不规则形状物体（树枝、铅笔或卡片堆）组成的材料的溶解。我们将各向异性问题简单地转换为等效的各向同性问题，并使用基于物质点方法的现有模拟器解决了这个新的“虚构”各向同性问题。我们的方法对现有模拟器的改动很小，它允许我们重新使用流行的各向同性塑性模型，如 Drucker-Prager 屈服准则，而不是为我们希望模拟的每个现象发明新的各向异性塑性模型。