Tensile fatigue strength and endurance limit of human meniscus

2022 ◽  
pp. 105057
Author(s):  
Bradley S. Henderson ◽  
Katelyn F. Cudworth ◽  
Madison E. Wale ◽  
Danielle N. Siegel ◽  
Trevor J. Lujan
Keyword(s):  
Fatigue Strength ◽  
Endurance Limit ◽  
Tensile Fatigue

scholarly journals Fatigue Strength of Acacia Mangium

2019 ◽  
pp. 29-32
Keyword(s):  
Tensile Strength ◽  
Fatigue Strength ◽  
Ultimate Tensile Strength ◽  
Endurance Limit ◽  
Acacia Mangium ◽  
Vertical Axis ◽  
Life Cycles ◽  
Grain Angle ◽  
Sinusoidal Waveform ◽  
Fatigue Endurance

The works in this study is to investigate and understand the nature of Acacia mangium axial fatigue strengths under repeated stress. Acacia mangium trees were cut to produce oven-dried Small Clear Specimens that were then tested until fracture in parallel to the grain direction. This was carried out in order to discover its Ultimate Tensile Strength, which was later identified as 143.87 MPa, in parallel to the grain direction (0° grain angle). In the next phase, specimens were tested for fatigue strengths in repeated-tensile sinusoidal waveform loading at 100 Hz frequency. The stress levels for this test were at the ratios of 80, 60, 40, 30, 20 and 10% of the Ultimate Tensile Strength (0° grain angle) for the construction of Life (N) - Stress (S) plots and empirical correlation. It was observed that the Acacia Mangium N-S (Wöhler) plots have an exponential correlation with the N – intercept of vertical axis at five (5) million cycles, while the intercept of horizontal, S – axis, was at 143.87 MPa. The study also observed that Acacia mangium achieves 106 life cycles at 10% stress level. For this reason, it is concluded that the material has a fatigue endurance limit at 10% of the Ultimate Tensile Strength for 0° grain angle.

Surface Integrity and Fatigue Strength of Hard Milled Surfaces

2011 ◽  
Author(s):  
W. Li ◽  
Y. B. Guo ◽  
M. E. Barkey ◽  
C. Guo ◽  
Z. Q. Liu
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Surface Integrity ◽  
Endurance Limit ◽  
Flank Wear ◽  
Machining Accuracy ◽  
Tool Flank Wear ◽  
Radial Depth ◽  
Aisi H13 Tool Steel ◽  
Machined Surfaces

Tool flank wear during hard milling adversely affects surface integrity and, therefore, fatigue strength of machined components. Surface integrity and machining accuracy deteriorate when tool wear progresses. In this paper, surface integrity and its impact on endurance limit of AISI H13 tool steel (50 ± 1 HRC) by milling using PVD coated tools are studied. The evolutions of surface integrity including surface roughness, microhardness and microstructure were characterized at three levels of tool flank wear (VB = 0, 0.1mm, 0.2mm). At each level of tool flank wear, the effects of cutting speed, feed, and radial depth-of-cut on surface integrity were investigated respectively. Fatigue endurance limits of the machined surfaces at different reliability levels were calculated and correlated with the experimentally determined fatigue life. The good surface finish and significant strain-hardening on the machined surfaces enhance endurance limit, which enables machined components have a fatigue life over 106 cycles.

scholarly journals Effects of Aging on Tensile Fatigue Strength of Bovine Dentin

1997 ◽  
Vol 16 (2) ◽  
pp. 156-169,224 ◽  
Author(s):  
Kenichi TONAMI ◽  
Hidekazu TAKAHASHI
Keyword(s):  
Fatigue Strength ◽  
Tensile Fatigue ◽  
Effects Of Aging

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 Tensile Fatigue Strength of Steel Plate Welded with Headed Stud or Rib Plate

2019 ◽  
Vol 68 (6) ◽  
pp. 463-469
Author(s):  
Kenji YOSHIDA ◽  
Hiroshi HIGASHIYAMA ◽  
Satoshi BANBA ◽  
Hiroshi KAIDO ◽  
Shigeyuki MATSUI
Keyword(s):  
Fatigue Strength ◽  
Steel Plate ◽  
Tensile Fatigue ◽  
Headed Stud
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