scholarly journals Estimation of Truck Frame Fatigue Life under Service Loading

2016 ◽  
Vol 150 ◽  
pp. 318-323 ◽  
Author(s):  
A.N. Savkin ◽  
A.S. Gorobtsov ◽  
K.A. Badikov
Keyword(s):  
Fatigue Life ◽  
Service Loading

scholarly journals Fatigue Life Evaluation under Service Loading by Frequency Domain Method

2008 ◽  
Vol 57 (12) ◽  
pp. 1186-1190 ◽  
Author(s):  
Akito ITO ◽  
Naoya NISHIMURA ◽  
Toshio HATTORI ◽  
Norio TAKEDA ◽  
Yasuki KITA
Keyword(s):  
Fatigue Life ◽  
Frequency Domain ◽  
Frequency Domain Method ◽  
Life Evaluation ◽  
Domain Method ◽  
Fatigue Life Evaluation ◽  
Service Loading

Method for Developing Variable Axial Loading in Thick Walled Pressure Vessels

2016 ◽  
Author(s):  
Lucas B. Smith ◽  
Philip C. Wheeler ◽  
Gregory N. Vigilante
Keyword(s):  
Fatigue Life ◽  
Fatigue Testing ◽  
Accurate Determination ◽  
Axial Loading ◽  
Pressure Vessels ◽  
Test Fixture ◽  
Us Army ◽  
Realistic Representation ◽  
Complex Test ◽  
Service Loading

Traditional hydraulic fatigue testing is performed on open ended cylindrical sections of pressure vessels to establish their fatigue life. Typically only hoop loading of the pressure vessels is required to determine fatigue life. However, for some specific geometries and service conditions a more complex test is required. It has been confirmed that certain geometries have experienced circumferential cracking because of combined, nearly equivalent axial loading and hoop loading. Consequently, a test fixture was engineered, designed, built and tested by US Army - Benét Laboratories / ARDEC to replicate the service loading condition. Simultaneous axial / hoop fatigue testing results in a more realistic representation of service loading conditions and a more accurate determination of fatigue life for these non-typical cases.

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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