A fatigue life prediction approach to surface and interior inclusion induced high cycle and very-high cycle fatigue for bainite/martensite multiphase steel

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2024-11-22 DOI:10.1016/j.ijfatigue.2024.108723

Yusong Fan , Guhui Gao , Xiang Xu , Rong Liu , Fengming Zhang , Xiaolu Gui

引用次数: 0

Abstract

In this study, the relationship between fatigue life and the feature parameters of fatigue fracture surfaces was statistically analyzed to successfully develop a new fatigue life prediction approach. Results showed that the inclusion location was an important parameter affecting fatigue life besides stress amplitude, inclusion size and material hardness. A new stress concentration influence factor associated with the effective depth of inclusions was defined to make fatigue strength and fatigue life prediction models more reliable. The newly proposed fatigue life prediction model could uniformly predict inclusion-induced high cycle and very-high cycle fatigue life, needless to classify surface or interior inclusion. Furthermore, this approach also demonstrated strong capability in predicting fatigue strength.

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贝氏体/马氏体多相钢表面和内部夹杂物诱发的高循环和超高循环疲劳寿命预测方法

本研究对疲劳寿命与疲劳断裂表面特征参数之间的关系进行了统计分析，成功开发出一种新的疲劳寿命预测方法。结果表明，除了应力振幅、夹杂物尺寸和材料硬度之外，夹杂物位置也是影响疲劳寿命的重要参数。为了使疲劳强度和疲劳寿命预测模型更加可靠，我们定义了一个与夹杂物有效深度相关的新的应力集中影响因子。新提出的疲劳寿命预测模型可以统一预测夹杂物引起的高循环和超高循环疲劳寿命，而无需对表面或内部夹杂物进行分类。此外，这种方法在预测疲劳强度方面也表现出很强的能力。

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

International Journal of Fatigue 工程技术-材料科学：综合

CiteScore

10.70

自引率

21.70%

发文量

619

审稿时长

58 days

期刊介绍： Typical subjects discussed in International Journal of Fatigue address: Novel fatigue testing and characterization methods (new kinds of fatigue tests, critical evaluation of existing methods, in situ measurement of fatigue degradation, non-contact field measurements) Multiaxial fatigue and complex loading effects of materials and structures, exploring state-of-the-art concepts in degradation under cyclic loading Fatigue in the very high cycle regime, including failure mode transitions from surface to subsurface, effects of surface treatment, processing, and loading conditions Modeling (including degradation processes and related driving forces, multiscale/multi-resolution methods, computational hierarchical and concurrent methods for coupled component and material responses, novel methods for notch root analysis, fracture mechanics, damage mechanics, crack growth kinetics, life prediction and durability, and prediction of stochastic fatigue behavior reflecting microstructure and service conditions) Models for early stages of fatigue crack formation and growth that explicitly consider microstructure and relevant materials science aspects Understanding the influence or manufacturing and processing route on fatigue degradation, and embedding this understanding in more predictive schemes for mitigation and design against fatigue Prognosis and damage state awareness (including sensors, monitoring, methodology, interactive control, accelerated methods, data interpretation) Applications of technologies associated with fatigue and their implications for structural integrity and reliability. This includes issues related to design, operation and maintenance, i.e., life cycle engineering Smart materials and structures that can sense and mitigate fatigue degradation Fatigue of devices and structures at small scales, including effects of process route and surfaces/interfaces.