A phase-field model for stress-assisted hydrogen diffusion and fracture: An Abaqus implementation

IF 5.6 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-05-21 DOI:10.1016/j.tafmec.2025.104988

K. Shiva Reddy , Amirtham Rajagopal , Timon Rabczuk

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引用次数: 0

Abstract

Hydrogen dissolved in metals – whether from either internal or external sources – can significantly degrade mechanical properties by interacting with material defects. In the present work, a comprehensive finite element framework for modelling the coupled deformation-diffusion-fracture problem is discussed. A staggered approach is employed to solve the coupled problem, where displacement, crack phase-field, and concentration fields are weakly coupled. A novel implementation of phase-field modelling for hydrogen-assisted fracture is developed within Abaqus/Standard, employing user-defined UEL and UVARM subroutines. The detailed implementation procedure facilitates modelling hydrogen-assisted fracture and similar coupled problems, providing researchers with a practical and accessible computational approach. The finite element code developed for one of the numerical simulations is available at: https://github.com/shivareddykondakindi/HED-Abaqus.git.

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应力辅助氢扩散和断裂的相场模型：Abaqus实现

溶解在金属中的氢——无论是来自内部还是外部——都会通过与材料缺陷相互作用而显著降低机械性能。在本工作中，讨论了一个综合的有限元框架来模拟变形-扩散-断裂耦合问题。采用交错法求解耦合问题，其中位移场、裂纹相场和浓度场是弱耦合的。在Abaqus/Standard中，采用用户定义的UEL和UVARM子程序，开发了氢辅助压裂相场建模的新实现。详细的实现程序便于对氢辅助破裂和类似耦合问题进行建模，为研究人员提供了一种实用且易于获取的计算方法。为其中一个数值模拟开发的有限元代码可在：https://github.com/shivareddykondakindi/HED-Abaqus.git上获得。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.