Effect of magnetization on anelasticity of compression steel coil spring

2018 ◽  
Vol 2018.67 (0) ◽  
pp. 220
Author(s):  
Shigeo KOTAKE ◽  
Takuro MURATA
Keyword(s):  
Coil Spring ◽  
Steel Coil

scholarly journals Experimental and Numerical Investigation of SUP12 Steel Coil Spring

2013 ◽  
Vol 68 ◽  
pp. 251-257 ◽  
Author(s):  
Mohd Izaham Zainal Abidin ◽  
Jamaluddin Mahmud ◽  
Mohd Juzaila Abd Latif ◽  
Aidah Jumahat
Keyword(s):  
Numerical Investigation ◽  
Coil Spring ◽  
Steel Coil

Prediction of the Fatigue Life of the SAE 5160 Carbon Steel Coil Spring Based on Strain-Life Approach

2020 ◽  
Vol 841 ◽  
pp. 381-386
Author(s):  
Teuku Edisah Putra ◽  
Husaini ◽  
Hary Prakasa
Keyword(s):  
Fatigue Life ◽  
Carbon Steel ◽  
Critical Point ◽  
Strain Gauge ◽  
Road Surface ◽  
Coil Spring ◽  
Steel Coil ◽  
Cycles To Failure

This study aims to identify the effect of road surface to coil spring fatigue life using the strain-life approach. Strain signals were measured by attaching a strain gauge at the critical point of the component. The car was driven on a flat road, as well as uphill, and downhill paths. The results show that the downhill road provided the lowest fatigue life, of 1.5E+4 cycles to failure, which was 53 % lower than that of the uphill and 2,233 % lower than the flat road owing to the braking factor which resulted in a higher stress to the coil spring.

Design and Fabrication a Lightweight Spring Made of Natural Rubber for a Motorcycle’s Shock Absorber

2020 ◽  
Vol 17 (1) ◽  
pp. 7758-7770
Author(s):  
V. Mann ◽  
C. Dechwayukul ◽  
W. Thongruang ◽  
S. Srewaradachpisal ◽  
P. Kaewpradit ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Shock Absorber ◽  
Testing Machine ◽  
Coil Spring ◽  
The Finite Element Method ◽  
Steel Coil ◽  
Damping Property ◽  
Stiffness Property ◽  
Rubber Compounds ◽  
Material Testing Machine

This research aims to design and fabricate a spring made of natural rubber for a lightweight motorcycle’s shock absorber. This study is carried out in four main steps. First, a stiffness property of a steel coil spring and a damping property of a commercial shock absorber were tested using an Instron® material testing machine and a test rig. Second, six different types of rubber compounds (A-1, A-2, A-3, B-1, B-2, and B-3) were formulated and the best compound was selected to use for a rubber spring. Third, the rubber spring was designed and analyzed using the finite element method to investigate the best model. Finally, a prototype of the rubber spring was fabricated and tested. The steel coil spring was replaced by the rubber spring and tested for its damping property within a real shock absorber. The results of the prototype testing showed that the weight of the rubber spring was lower than the steel coil spring about 48%. The stiffness property of the rubber spring was higher than the steel coil spring around 43% and the damping property of the shock absorber using rubber spring was higher than the damping property of the shock absorber using steel coil spring about 6%.  The rubber spring provided more advantages than the steel coil spring for its good corrosion resistance, lightweight, and ease of maintenance. However, the implementation of the rubber spring in the real motorcycle and its fatigue life should be studied in the next future.

PSEUDOELASTIC BEHAVIOR OF COIL SPRING MADE OF A HIGH-DAMPING Cu-Zn-Al ALLOY

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-1019-C5-1024
Author(s):  
K. Sugimoto ◽  
Y. Nakamura ◽  
L. Delaey
Keyword(s):  
Al Alloy ◽  
Coil Spring ◽  
Pseudoelastic Behavior

FAILURE ANALYSIS OF A COIL SPRING APPLIED IN THE REAR SUSPENSION OF A CITY VEHICLE

2019 ◽  
Author(s):  
Gilmar Cordeiro da Silva ◽  
Marcio Martins ◽  
Caio Silva ◽  
Felipe Bergh ◽  
Pedro Henrique Paiva ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Coil Spring ◽  
Rear Suspension

Optimization of Heavy Duty Three Wheeler Front Suspension Coil Spring Using FEA

2019 ◽  
Author(s):  
Saravanan A ◽  
Suresh P ◽  
Arvidha Balaji S ◽  
Sudharsan G
Keyword(s):  
Coil Spring ◽  
Heavy Duty ◽  
Front Suspension

scholarly journals Passive knee exoskeletons in functional tasks: Biomechanical effects of a SpringExo coil-spring on squats

2021 ◽  
Vol 2 ◽  
Author(s):  
Rand Hidayah ◽  
Dongbao Sui ◽  
Kennedi A. Wade ◽  
Biing-Chwen Chang ◽  
Sunil Agrawal
Keyword(s):  
Outcome Measures ◽  
Muscle Activation ◽  
Rectus Femoris ◽  
Knee Extension ◽  
Lower Limbs ◽  
Flexion Angle ◽  
Coil Spring ◽  
Foot Pressure ◽  
Low Profile ◽  
Muscle Activations

Abstract Passive wearable exoskeletons are desirable as they can provide assistance during user movements while still maintaining a simple and low-profile design. These can be useful in industrial tasks where an ergonomic device could aid in load lifting without inconveniencing them and reducing fatigue and stress in the lower limbs. The SpringExo is a coil-spring design that aids in knee extension. In this paper, we describe the muscle activation of the knee flexors and extensors from seven healthy participants during repeated squats. The outcome measures are the timings of the key events during squat, flexion angle, muscle activation of rectus femoris and bicep femoris, and foot pressure characteristics of the participants. These outcome measures assess the possible effects of the device during lifting operations where reduced effort in the muscles is desired during ascent phase of the squat, without changing the knee and foot kinematics. The results show that the SpringExo significantly decreased rectus femoris activation during ascent (−2%) without significantly affecting either the bicep femoris or rectus femoris muscle activations in descent. This implies that the user could perform a descent without added effort and ascent with reduced effort. The exoskeleton showed other effects on the biomechanics of the user, increasing average squat time (+0.02 s) and maximum squat time (+0.1 s), and decreasing average knee flexion angle (−4°). The exoskeleton has no effect on foot loading or placement, that is, the user did not have to revise their stance while using the device.

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