Evaluation of the nugget diameter in spot welded joints between two steel sheets by means of a potential drop technique

2015 ◽  
Vol 26 (8) ◽  
pp. 085602 ◽  
Author(s):  
Hironori Tohmyoh ◽  
Hidetomo Ikarashi ◽  
Yoichi Matsui ◽  
Yuta Hasegawa ◽  
Satoshi Obara
Keyword(s):  
Welded Joints ◽  
Potential Drop ◽  
Steel Sheets ◽  
Nugget Diameter ◽  
Drop Technique ◽  
Spot Welded

Fatigue Life of Multi-Lap Welding of Automotives Steel Sheet by QSTS

2008 ◽  
Vol 33-37 ◽  
pp. 151-156
Author(s):  
Seung Chul Shin ◽  
Sung Mo Yang ◽  
Hyo Sun Yu ◽  
Hee Yong Kang ◽  
Chae Won Kim
Keyword(s):  
Life Cycle ◽  
Fatigue Life ◽  
Welded Joints ◽  
Fuel Efficiency ◽  
Life Extension ◽  
Steel Sheets ◽  
Whole Process ◽  
Lap Welding ◽  
Automotive Steel ◽  
Spot Welded

This paper shows how the number of lap of spot welded joints in automotive steel sheets changes the life -cycle transform of itself. There has been significant developments in the life extension of automotive steel sheets, as well as in passenger safety. We verified the validity of the S-N curve of materials by QSTS test. Moreover, we used EZNCEN and HS40R, which are commonly used as automotive steel sheets because of their excellence in increasing fuel efficiency. The purpose of research was to compare the fatigue life of multi - lap of spot welded joints to there. In addition s, we used the two different kinds of sheets together in the same welding under the same condition. Through this whole process, the hypothesis on the life cycle of lethargy coefficients was found to be in good agreement with the result of the experiment. That is, when using sheets of the same materials in one welding, the fatigue life of two laps of a spot welded joint was found to be much superior by EZNCEN 5~14%, HS40R 17~30%,and when using each sheet of different materials, we found the decrease in fatigue life by 6~16%. Finally, the best value from the data was chosen based on the experiment for the analysis of the fatigue life of each layer.

1410 Effect of Nugget Diameter on Fatigue Strength of Spot-Welded Joints

2010 ◽  
Vol 2010 (0) ◽  
pp. 660-661
Author(s):  
Takeshi TAKASU ◽  
Noboru TOMIOKA ◽  
Akifumi OKABE
Keyword(s):  
Fatigue Strength ◽  
Welded Joints ◽  
Nugget Diameter ◽  
Spot Welded
Sign in / Sign up

Export Citation Format

Share Document