scholarly journals Fatigue Strength of Hot-Rolled High Strength Steel Sheet with Shearing Edge (Part 2 Improvement of Fatigue Strength by Shaving Process)

2013 ◽  
Vol 79 (808) ◽  
pp. 1832-1839
Author(s):  
Masao KINEFUCHI ◽  
Takayuki KITAMURA
Keyword(s):  
Fatigue Strength ◽  
High Strength Steel ◽  
Steel Sheet ◽  
High Strength ◽  
Edge Part ◽  
Hot Rolled

Effect of Material Anisotropies of Hot-Rolled High-Strength Steel Sheet on Localized Deformation Behavior in Hole Expansion - Part-I Experimental Consideration to Circular and Oval Hole

2016 ◽  
Vol 725 ◽  
pp. 592-597 ◽  
Author(s):  
Toshiya Suzuki ◽  
Kazuo Okamura ◽  
Yuya Ishimaru ◽  
Hiroshi Hamasaki ◽  
Fusahito Yoshida
Keyword(s):  
High Strength Steel ◽  
Deformation Behavior ◽  
Steel Sheet ◽  
High Strength ◽  
Localized Deformation ◽  
Hole Expansion ◽  
Expansion Test ◽  
Hole Edge ◽  
Hole Expansion Test ◽  
Hot Rolled

In this study, the effect of the material anisotropies of hot-rolled high-strength steel sheet on localized deformation behavior in hole expansion test has been investigated experimentally. First, the hole expansion test with the circular hole has been conducted to investigate the effect of anisotropies of material properties on the localized deformation behavior around the hole edge. Next, the hole expansion test with the oval hole has been conducted to investigate the effect of the major axis direction of the oval hole on the localized deformation behavior around the hole edge. As a result, it was clarified that the effect of anisotropies of r-value and n-value on the localized deformation behavior is strong, especially the anisotropy of n-value.

Improvement of Fatigue Strength of Hole Edge of Ultra-High Strength Steel Sheet by Punching Process Including Thickening

2016 ◽  
Vol 716 ◽  
pp. 428-434 ◽  
Author(s):  
Yohei Abe ◽  
Ken-Ichiro Mori ◽  
Ryota Kosaka
Keyword(s):  
Fatigue Strength ◽  
High Strength Steel ◽  
Steel Sheet ◽  
High Strength ◽  
Bending Fatigue ◽  
Hole Edge ◽  
Tensile Fatigue ◽  
Ultra High Strength Steel ◽  
Bending Fatigue Strength ◽  
Punching Process

The effect of the hole edge shape formed by a punching process including thickening on the fatigue strength of the hole of ultra-high strength steel sheets was investigated. The bending and tensile fatigue tests of the thickened hole edge were performed. For the bending fatigue strength, the high height of hole edge was effective because of high bending stiffness. Although the high tensile stiffness was important for the high tensile fatigue strength, the shape of hole edge was alternative. To increase both the bending and tensile fatigue strengths, a compressive process in rollover of hole edge was added for the thickened sheet having a high bending fatigue strength. It was found that the thickened and compressed hole edge of ultra-high strength steel sheet was effective in improving both the bending and tensile fatigue strengths.

scholarly journals Improvement of Fatigue Strength of High Strength Hot Rolled Steel Sheet for Truck Frame Use

2001 ◽  
Vol 87 (8) ◽  
pp. 557-563 ◽  
Author(s):  
Kunikazu TOMITA ◽  
Tsuyoshi SHIOZAKI ◽  
Toshiaki URABE ◽  
Koichi OSAWA
Keyword(s):  
Fatigue Strength ◽  
Steel Sheet ◽  
High Strength ◽  
Rolled Steel ◽  
Hot Rolled ◽  
Hot Rolled Steel

scholarly journals Flanging Using Step Die for Improving Fatigue Strength of Punched High Strength Steel Sheet

2014 ◽  
Vol 81 ◽  
pp. 1133-1138 ◽  
Author(s):  
Purwo Kadarno ◽  
Ken-ichiro Mori ◽  
Yohei Abe ◽  
Tatsuro Abe
Keyword(s):  
Fatigue Strength ◽  
High Strength Steel ◽  
Steel Sheet ◽  
High Strength
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