Steel Ribbon Belt Reinforcement Mechanics

1977 ◽  
Vol 5 (1) ◽  
pp. 29-69
Author(s):  
B. K. Daniels
Keyword(s):  
Fatigue Life ◽  
Penetration Resistance ◽  
Ribbon Thickness ◽  
Basic Design ◽  
Ribbon Width ◽  
Satisfactory Performance ◽  
Plane Flexure ◽  
Steel Ribbon ◽  
Fatigue Mechanism

Abstract Satisfactory performance of steel ribbon belted radial tires of standard basic design is possible. The key to good fatigue life is that flexure is accommodated by shear of the rubber between the plies instead of by compression as in a twisted cord. Belt angle controls part of the fatigue mechanism but stress and lifetime are insensitive to its value. Several mechanisms combine to give a fatigue life that is independent of ribbon width below 1.7 mm (65 mils). Above 1.7 mm width in-plane flexure causes fatigue life to drop rapidly. No improvement from changed ribbon thickness is predicted. Tread life appears to be better with ribbon than with cord, but the reason for this is not clear. Ribbon packing geometry gives superior nail penetration resistance.

scholarly journals Solder Fatigue Mechanism and Thermal Fatigue Life.

1994 ◽  
Vol 10 (3) ◽  
pp. 2-8
Author(s):  
Michifumi Kawai ◽  
Ryoohei Sato
Keyword(s):  
Fatigue Life ◽  
Thermal Fatigue ◽  
Thermal Fatigue Life ◽  
Solder Fatigue ◽  
Fatigue Mechanism

Development of Fatigue Life Prediction Method that Focuses on the Fatigue Mechanism

2016 ◽  
Vol 2016.24 (0) ◽  
pp. 320
Author(s):  
Kazuki Harigai ◽  
Yukiyoshi KOBAYASHI ◽  
Toshihisa OTSUKA ◽  
Yoshinao KISHIMOTO
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Prediction Method ◽  
Fatigue Life Prediction ◽  
Fatigue Mechanism

scholarly journals Effects of Notches and Defects on Dwell Fatigue Mechanism and Fatigue Life of Ti-6Al-4V ELI Alloy Used in Deep-Sea Submersibles

2021 ◽  
Vol 9 (8) ◽  
pp. 845
Author(s):  
Jian Sun ◽  
Lei Wu ◽  
Chengqi Sun
Keyword(s):  
Fatigue Life ◽  
Deep Sea ◽  
Maximum Stress ◽  
Fatigue Testing ◽  
Fatigue Behavior ◽  
Local Maximum ◽  
Control Mode ◽  
Notched Specimens ◽  
Dwell Fatigue ◽  
Fatigue Mechanism

The notch (i.e., stress concentration) and defect are important factors influencing the conventional fatigue behavior of metallic materials. What is the influence of notches and defects on the dwell fatigue mechanism and fatigue life? In this paper, the effects of notches and defects on the dwell fatigue behavior of the Ti-6Al-4V ELI alloy used in deep-sea submersibles are investigated under the load control mode. It is shown that the dwell fatigue is insensitive to the defect size (190–438 μm) compared to the conventional fatigue. For notched specimens, they all present fatigue failure mode under dwell fatigue testing, and the dwell fatigue life is higher than that of the smooth specimen at the same local maximum stress. The dwell of the maximum stress has no influence on the fatigue life and failure mechanism for notched specimens. Moreover, the facet feature is observed in the crack initiation region for both the conventional and dwell fatigue of notched specimens. Electron backscatter diffraction observation indicates that the feature of the fine line markings on the facet in the image by scanning electron microscope is due to the steps on the fracture surface of the α grain.

Fatigue Life of Superelastic Springs for an Anterior Cruciate Ligament Prosthesis

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-1223-C8-1228
Author(s):  
N. Hagemeister ◽  
L'H. Yahia ◽  
E. Weynant ◽  
T. Lours
Keyword(s):  
Anterior Cruciate Ligament ◽  
Fatigue Life ◽  
Cruciate Ligament ◽  
Anterior Cruciate ◽  
Ligament Prosthesis

Modification of MnS inclusion by tellurium in 38MnVS6 micro-alloyed steel

2020 ◽  
Vol 117 (6) ◽  
pp. 615
Author(s):  
Ping Shen ◽  
Lei Zhou ◽  
Qiankun Yang ◽  
Zhiqi Zeng ◽  
Kenan Ai ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Aspect Ratio ◽  
Strong Influence ◽  
Experimental Results ◽  
Alloyed Steel ◽  
Equivalent Diameter ◽  
Small Aspect Ratio ◽  
Steel Quality ◽  
Eds Analysis ◽  
Micro Alloyed Steel

In 38MnVS6 steel, the morphology of sulfide inclusion has a strong influence on the fatigue life and machinability of the steel. In most cases, the MnS inclusions show strip morphology after rolling, which significantly affects the steel quality. Usually, the MnS inclusion with a spherical morphology is the best morphology for the steel quality. In the present work, tellurium was applied to 38MnVS6 micro-alloyed steel to control the MnS inclusion. Trace tellurium was added into 38MnVS6 steel and the effect of Te on the morphology, composition, size and distribution of MnS inclusions were investigated. Experimental results show that with the increase of Te content, the equivalent diameter and the aspect ratio of inclusion decrease strikingly, and the number of inclusions with small aspect ratio increases. The inclusions are dissociated and spherized. The SEM-EDS analysis indicates that the trace Te mainly dissolves in MnS inclusion. Once the MnS is saturated with Te, MnTe starts to generate and wraps MnS. The critical Te/S value for the formation of MnTe in the 38MnV6 steel is determined to be approximately 0.075. With the increase of Te/S ratio, the aspect ratio of MnS inclusion decreases and gradually reaches a constant level. The Te/S value in the 38MnVS6 steel corresponding to the change of aspect ratio from decreasing to constant ranges from 0.096 to 0.255. This is most likely to be caused by the saturation of Te in the MnS inclusion. After adding Te in the steel, rod-like MnS inclusion is modified to small inclusion and the smaller the MnS inclusion, the lower the aspect ratio.

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