Tension-tension fatigue performances of a pultruded carbon fiber reinforced epoxy plate at elevated temperatures

被引：16

作者：

Wu, Pangang ^{[1
]}

Xu, Longjun ^{[1
]}

Luo, Jianlin ^{[2
,3
]}

Zhang, Xueyi ^{[4
]}

Bian, Wenfeng ^{[1
]}

机构：

[1] Harbin Inst Technol Weihai, Dept Civil Engn, Weihai 264209, Peoples R China

[2] Qingdao Univ Technol, Sch Civil Engn, Collaborat Innovat Ctr Engn Construct & Safety Sh, Qingdao 266033, Peoples R China

[3] Western Sydney Univ, Ctr Infrastruct Engn, Sch Comp Engn & Math, Sydney, NSW 2751, Australia

[4] Harbin Engn Univ, Coll Aerosp & Civil Engn, Harbin 150001, Heilongjiang, Peoples R China

来源：

COMPOSITE STRUCTURES | 2019年 / 215卷

基金：

中国国家自然科学基金;

关键词：

Pultruded CFRP plate; Tension fatigue performance; Elevated temperature; Failure mechanism; Microstructure; MODE-I; DELAMINATION TOUGHNESS; POLYMER COMPOSITES; GROWTH-RATE; BEHAVIOR; FRP; DURABILITY; MOISTURE; STRESS;

D O I：

10.1016/j.compstruct.2019.02.062

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Fatigue performance of pultruded CFRP plate at elevated temperature is essential for the design process and applications in structure rehabilitation and reinforcement. Here, tension-tension fatigue performances of pultruded CFRP plate at room temperature (RT), 50 degrees C and 83 degrees C (T-g minus 30 degrees C) were investigated along with static tension properties. The static tensile strength at different temperature (f(u)(t)), fatigue life, prediction formula, temperature curves, stiffness curves and fatigue failure mechanisms were comprehensively studied in tandem with microstructure. Results reveal, temperature increase and fatigue load lead to resin thermo-elasto-plastic softening and premature failure; the resultant fatigue life is significantly reduced when temperature is close to 83 degrees C; the fatigue life at RT, 50 degrees C and 83 degrees C exceeds 2 x 10(6) cycles with 95% reliability under stress level of 49.95%f(u)(t) , 49.03%f(u)(t) , and 43.24%f(u)(t) , respectively.

引用

页码：421 / 431

页数：11

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