Gigacycle Fatigue Behavior of 1800 MPa Grade High Strength Spring Steel for Automobile Lightweight

2014 ◽  
Vol 21 (6) ◽  
pp. 614-618 ◽  
Author(s):  
Ji-ming Zhang ◽  
Ling-kang Ji ◽  
Dong-jie Bao ◽  
Yao-rong Feng ◽  
Shou-xin Li ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
High Strength ◽  
Spring Steel

Very high cycle fatigue behavior of shot-peened 3Cr13 high strength spring steel

2013 ◽  
Vol 50 ◽  
pp. 503-508 ◽  
Author(s):  
Baohua Nie ◽  
Zheng Zhang ◽  
Zihua Zhao ◽  
Qunpeng Zhong
Keyword(s):  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
High Strength ◽  
Spring Steel ◽  
Cycle Fatigue ◽  
Very High Cycle Fatigue ◽  
Very High

536 Effect of Non-metallic Inclusion on High Cycle Fatigue Behavior in High-Strength Spring Steel

2000 ◽  
Vol 2000.8 (0) ◽  
pp. 381-382
Author(s):  
Going-Won Lee ◽  
Ikuo Ochiai ◽  
Hiroaki Hayashi ◽  
Hiroyuki Kawada
Keyword(s):  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
High Strength ◽  
Spring Steel ◽  
Cycle Fatigue ◽  
Metallic Inclusion

Effects of mean shear stress on the torsional fatigue strength of a spring steel with small scratches

2019 ◽  
Vol 29 (1) ◽  
pp. 4-18 ◽  
Author(s):  
Y Nishimura ◽  
K Yanase ◽  
Y Tanaka ◽  
N Miyamoto ◽  
S Miyakawa ◽  
...  
Keyword(s):  
Shear Stress ◽  
Fatigue Limit ◽  
Fatigue Testing ◽  
Fatigue Behavior ◽  
Testing Machine ◽  
High Strength ◽  
Spring Steel ◽  
Material Condition ◽  
Torsional Fatigue ◽  
Static Shear

The torsional fatigue behavior of a high-strength spring steel, SWOSC-V, was investigated. Of particular interest were the influences of small scratches and superimposed static shear stress in the very high cycle fatigue regime. To achieve the research objectives, an ultrasonic torsional fatigue testing machine was developed. S-Ncurves showed the fatigue limit for the tested material condition (i.e. with no residual stresses at specimen surface). This study revealed that a notable influence of the stress ratio, R, on the torsional fatigue behavior was not explicitly recognized. Concerning the influence of small scratches, it was found that the [Formula: see text]-parameter model can predict the lower bound of the torsional fatigue limit, irrespective of the value of R.

INLAND DURASPRING

Alloy Digest ◽  
1998 ◽  
Vol 47 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Tensile Properties ◽  
High Stress ◽  
High Strength ◽  
Spring Steel ◽  
Fatigue Properties ◽  
Light Truck ◽  
Suspension Systems ◽  
Spring Steels

Abstract Inland DuraSpring is a high-strength microalloyed spring steel for use in high stress coil springs for automobile and light truck suspension systems. This bar product offers significant improvements in tensile strength, fatigue properties, and fracture toughness compared to conventional spring steels. This datasheet provides information on composition, hardness, and tensile properties as well asfracture toughness and fatigue. Filing Code: SA-496. Producer or source: Ispat Inland Inc.

scholarly journals Fatigue Life Improvement of Cracked Aluminum 6061-T6 Plates Repaired by Composite Patches

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1421
Author(s):  
Armin Yousefi ◽  
Saman Jolaiy ◽  
Reza Hedayati ◽  
Ahmad Serjouei ◽  
Mahdi Bodaghi
Keyword(s):  
Fatigue Life ◽  
Fatigue Behavior ◽  
Weight Ratio ◽  
High Strength ◽  
Plastic Strain Amplitude ◽  
Composite Patch ◽  
Life Improvement ◽  
Cracked Structures ◽  
Aluminum Plates ◽  
High Flexibility

Bonded patches are widely used in several industry sectors for repairing damaged plates, cracks in metallic structures, and reinforcement of damaged structures. Composite patches have optimal properties such as high strength-to-weight ratio, easiness in being applied, and high flexibility. Due to recent rapid growth in the aerospace industry, analyses of adhesively bonded patches applicable to repairing cracked structures have become of great significance. In the present study, the fatigue behavior of the aluminum alloy, repaired by a double-sided glass/epoxy composite patch, is studied numerically. More specifically, the effect of applying a double-sided composite patch on the fatigue life improvement of a damaged aluminum 6061-T6 is analyzed. 3D finite element numerical modeling is performed to analyze the fatigue performance of both repaired and unrepaired aluminum plates using the Abaqus package. To determine the fatigue life of the aluminum 6061-T6 plate, first, the hysteresis loop is determined, and afterward, the plastic strain amplitude is calculated. Finally, by using the Coffin-Manson equation, fatigue life is predicted and validated against the available experimental data from the literature. Results reveal that composite patches increase the fatigue life of cracked structures significantly, ranging from 55% to 100% for different applied stresses.

Constant-amplitude fatigue behavior of M24 high-strength bolt of end-plate flange connection

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 2041-2053
Author(s):  
Jinfeng Jiao ◽  
Zhanxiang Liu ◽  
Qi Guo ◽  
Yong Liu ◽  
Honggang Lei
Keyword(s):  
Fatigue Behavior ◽  
High Strength ◽  
Constant Amplitude ◽  
Flange Connection ◽  
End Plate ◽  
High Strength Bolt
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