Towards Viscoplastic Constitutive Models for Cosserat Rods
Towards Viscoplastic Constitutive Models for Cosserat Rods
复制标题
Cosserat 棒的粘塑性本构模型
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
S. Diebels
中科院分区：
文献类型：
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作者：
Vanessa Dörlich;J. Linn;T. Scheffer;S. Diebels
柔性细长结构，如电缆、软管或电线，可以用几何精确的Cosserat杆理论来描述。由于其复杂的多层结构，由各种材料组成，粘塑性行为必须预期的电缆在负载下。单轴拉伸、扭转或三点弯曲等经典实验已经表明，电缆等的行为是粘塑性的。一个合适的本构关系所观察到的负载情况下是一个现实的模拟组件的变形是至关重要的。因此，这一贡献的目的是在一个粘塑性本构关系制定的Cosserat杆的截面量。由于在应用中的电缆的负载在大多数情况下不是由这些主要是单轴的经典实验，而是多轴的，新的实验电缆的设计。它们必须说明粘塑性效应，能够访问（粘塑性）材料参数，并考虑不同变形模式之间的耦合效应。这项工作的重点是设计这样的实验。
Flexible, slender structures like cables, hoses or wires can be described by the geometrically exact Cosserat rod theory. Due to their complex multilayer structure, consisting of various materials, viscoplastic behavior has to be expected for cables under load. Classical experiments like uniaxial tension, torsion or three-point bending already show that the behavior of e.g. electric cables is viscoplastic. A suitable constitutive law for the observed load case is crucial for a realistic simulation of the deformation of a component. Consequently, this contribution aims at a viscoplastic constitutive law formulated in the terms of sectional quantities of Cosserat rods. Since the loading of cables in applications is in most cases not represented by these mostly uniaxial classical experiments, but rather multiaxial, new experiments for cables have to be designed. They have to illustrate viscoplastic effects, enable access to (viscoplastic) material parameters and account for coupling effects between different deformation modes. This work focuses on the design of such experiments.