In-situ experimental and numerical investigation on fatigue crack growth in perfluorosulfonic-acid membrane with overloading effect

被引：0

作者：

Cai, Liang ^{[1
]}

Song, Pilin ^{[1
]}

Elbugdady, Ibrahim ^{[1
]}

Sakai, Tatsuo ^{[2
]}

Li, Wei ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China

[2] Ritsumeikan Univ, Coll Sci & Engn, Kusatsu 5258577, Japan

来源：

ENGINEERING FRACTURE MECHANICS | 2024年 / 305卷

基金：

中国国家自然科学基金;

关键词：

In; -situ; Single overload; Cyclic plastic zone; Constitutive modeling; Plastically dissipated energy; FUEL-CELL MEMBRANES; MECHANICAL DEGRADATION; PROPAGATION BEHAVIOR; EVOLUTION; NAFION;

D O I：

10.1016/j.engfracmech.2024.110175

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Fatigue crack growth behavior of perfluorosulfonic-acid membrane is investigated under single overload conditions by in-situ fatigue testing. The results show that the effected range of overload on cyclic plasticity positively correlates with the overload ratio (Rol), indicating that overloadinduced residual stress is aggravated with increase of Rol. Besides, crack-tip sharpening occurred at higher Rol can promote cyclic plasticity deformation, thus initially accelerating the crack growth. Moreover, the cyclic plasticity can be used to interpret the post-overload crack growth. Based on plastically dissipated energy, a numerical scheme incorporated with developed elastic-viscoplastic constitutive relationship is established to predict the fatigue crack growth.

引用

页数：23

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