Fundamental physical principles and cohesive zone models at finite displacements – Limitations and possibilities
Fundamental physical principles and cohesive zone models at finite displacements – Limitations and possibilities
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有限位移下的基本物理原理和粘性区模型 - 局限性和可能性
DOI：
10.1016/j.ijsolstr.2014.10.020
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发表时间：
2015
影响因子：
3.6
通讯作者：
J. Mosler
中科院分区：
文献类型：
--
作者：
N. S. Ottosen;M. Ristinmaa;J. Mosler
根据热力学一致性、角动量平衡和材料框架无关性提供的基本原则，讨论和评估了有限位移和裂纹开口下的内聚区建模。结果表明，在经典黏结区框架下已有的原型黏结区模型中，只有全各向同性弹性模型或结合各向同性损伤理论的全各向同性弹性模型满足上述所有基本原则，而现有弹塑性模型则不满足。因此，在经典内聚区框架内，提出了一种新的弹塑性模型，满足了所有要求。随后，对经典黏聚区框架进行了推广，并在此框架下提出了一致弹塑性模型。
Cohesive zone modeling at finite displacements and crack openings are discussed and evaluated in relation to the fundamental principles provided by thermodynamic consistency, balance of angular momentum and material frame indifference. It is shown that among the existing prototype cohesive zone models within the classical cohesive zone framework, only fully isotropic elastic models or fully isotropic elastic models combined with isotropic damage theory fulfill all of the aforementioned fundamental principles whereas present elasto-plastic models do not. For this reason, and still within the classical cohesive zone framework, a novel elasto-plastic model is proposed which fulfills all requirements. Subsequently, the classical cohesive zone framework is generalized and within this new framework a consistent elasto-plastic model is proposed.