Stress-Based Fracture Model to Describe Ductile Fracture Behavior in Various Stress States

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-12-20 DOI:10.1111/ffe.14548

Pengfei Wu, Yanshan Lou

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引用次数: 0

Abstract

Being aimed at the strain path–related ductile fracture characteristic, this research develops a two-component stress-based DF2016 fracture model with 10 parameters through combining two single-component corresponding fracture model with the addition form. This model possesses high flexibility to describe the ductile fracture behavior in various stress states. Stress-based fracture-related variables of the specimens with 10 different structures for WE43 alloy are captured, and the hardening behavior is with some strength differential effect. These fracture stresses have a strong sensitiveness to stress triaxiality and Lode parameter. Fracture loci of WE43 alloy are constructed by the proposed model with the smaller prediction error of 0.25683 than the stress-based DF2016 fracture model (0.527). The reliability and high flexibility of the developed model are further uncovered through the description of ductile fracture behavior of AA2024-T351 alloy. This research provides a valuable tool for predicting fracture failure of metals in engineering applications.

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针对与应变路径相关的韧性断裂特征，本研究通过将两个单组分相应断裂模型以加法形式组合在一起，建立了一个具有 10 个参数的基于应力的双组分 DF2016 断裂模型。该模型具有很高的灵活性，可以描述各种应力状态下的韧性断裂行为。该模型捕捉了 WE43 合金 10 种不同结构试样的基于应力的断裂相关变量，其硬化行为具有一定的强度差异效应。这些断裂应力对应力三轴性和 Lode 参数有很强的敏感性。通过提出的模型构建了 WE43 合金的断裂位置，其预测误差为 0.25683，小于基于应力的 DF2016 断裂模型（0.527）。通过描述 AA2024-T351 合金的韧性断裂行为，进一步揭示了所开发模型的可靠性和高灵活性。这项研究为预测工程应用中金属的断裂失效提供了有价值的工具。

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

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.