Quantitative evaluation of cumulative plastic damage for ferromagnetic steel under low cycle fatigue based on magnetic memory method

Strain ◽  
2021 ◽  
Author(s):  
Sanqing Su ◽  
Xiaoping Ma ◽  
Wei Wang ◽  
Yiyi Yang ◽  
Jingyu Hu
Keyword(s):  
Quantitative Evaluation ◽  
Low Cycle Fatigue ◽  
Magnetic Memory ◽  
Cycle Fatigue ◽  
Plastic Damage ◽  
Ferromagnetic Steel

Low-Cycle-Fatigue Crack Closure Effect of Ship Cracked Plate Considering the Accumulative Plastic Damage

2019 ◽  
Author(s):  
Yuelin Song ◽  
Ping Yang ◽  
Ziya Peng ◽  
Wei Jiang ◽  
Kang Hu
Keyword(s):  
Stress Field ◽  
Compressive Stress ◽  
Crack Closure ◽  
Low Cycle Fatigue ◽  
Crack Tip ◽  
Cycle Fatigue ◽  
Plastic Damage ◽  
Closure Effect ◽  
Closure Level ◽  
The Relationship

Abstract In this paper, the relationship between crack closure level and the crack length is studied with experiment and numerical simulation under different low cycle fatigue (LCF) loads. The evolution mechanism of crack closure behavior is explored through the variations of the accumulative plastic strain and compressive stress near the crack-tip. The compressive residual stress is separated into two parts for comparative analysis, namely: the stress field ahead of the crack tip and the stress field of the wake region. The magnitude of the compressive stress field is obtained by the integration along the crack propagation direction of the normal stress. The results show that there is an excellent correlation between LCF crack closure level and the magnitude of the compressive stress in the plastic wake, which provides a new way to further study the complex mechanism of crack closure under LCF loads.

Numerical and Experimental Research on Residual Ultimate Strength of Hull Plates Under Uniaxial Cyclic Loads

2019 ◽  
Author(s):  
Tian Xia ◽  
Ping Yang ◽  
Cong Cui ◽  
Ziya Peng ◽  
Li Ma
Keyword(s):  
Ultimate Strength ◽  
Cyclic Load ◽  
Low Cycle Fatigue ◽  
Numerical Results ◽  
Ship Hull ◽  
Nonlinear Finite Element ◽  
Cyclic Loads ◽  
Nonlinear Finite Element Method ◽  
Cycle Fatigue ◽  
Plastic Damage

Abstract The present paper aims at obtaining insights on the strength behaviors of ship hull plates under uniaxial cyclic loads. The residual ultimate strength of ship hull plates under uniaxial cyclic load is studied by numerical analysis using nonlinear finite element method. A series of tests are also conducted for comparison and verify the reasonability of numerical results. The accumulated plastic damage and crack propagation from the low cycle fatigue damage during cyclic load are both considered in present study. From the numerical results and tests some significant conclusions are drawn to the residual ultimate strength of plates under uniaxial cyclic loads.

Effect of Texture and {10-12} Twin on the Low Cycle Fatigue Properties of Rolled AZ31 Mg Alloy

2013 ◽  
Vol 51 (5) ◽  
pp. 325-332 ◽  
Author(s):  
Sung Hyuk Park ◽  
Seong-Gu Hong ◽  
Chong Soo Lee ◽  
Ha Sik Kim
Keyword(s):  
Low Cycle Fatigue ◽  
Mg Alloy ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Az31 Mg Alloy
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