scholarly journals Numerical study on the influence of artificial internal stress relief groove on fretting fatigue in a shrink-fitted assembly

2020 ◽  
Vol 151 ◽  
pp. 106443 ◽  
Author(s):  
Diego Erena ◽  
Jesús Vázquez ◽  
Carlos Navarro ◽  
Reza Talemi
Keyword(s):  
Internal Stress ◽  
Numerical Study ◽  
Stress Relief ◽  
Fretting Fatigue ◽  
Relief Groove

Numerical and Experimental Analysis of Stress and Strains in Flat Ends of High-Pressure Vessels

2011 ◽  
Vol 490 ◽  
pp. 226-236 ◽  
Author(s):  
Bogdan Szybiński ◽  
Paweł Romanowicz ◽  
Andrzej P. Zieliński
Keyword(s):  
High Pressure ◽  
Numerical Study ◽  
Stress Relief ◽  
Pressure Vessels ◽  
Experimental Investigations ◽  
Engineering Practice ◽  
Junction Area ◽  
Definite Answer ◽  
Asme Code ◽  
Relief Groove

Application of flat welded ends with stress relief grooves in high-pressure vessels is a common alternative to use of dished vessel ends. It is well established and follows calculation rules given in codes: EN-12952-3 [1], EN-13445-3 [2], or in ASME code [3]. However the calculation rules do not give any definite answer what should be the choice of parameters defining a circular stress relief groove, for example, position of the groove and its radius. Usually the choice of them relies on engineering practice. The present paper clearly shows the influence of this choice on stress concentration in the cylinder-endplate junction area. The results of numerical study are verified in experimental investigations performed for a cylindrical high-pressure vessel.

Numerical Study of a Panel with Big Grooves Subjected to In-Plane Tension

2010 ◽  
Vol 102-104 ◽  
pp. 297-300
Author(s):  
Ning Huang ◽  
Ming Hui Huang ◽  
Li Hua Zhan
Keyword(s):  
Stress Concentration ◽  
Numerical Study ◽  
Main Idea ◽  
Stress Relief ◽  
Structure Design ◽  
The Body ◽  
Transition Structure ◽  
Calculation Results ◽  
Relief Groove ◽  
Close Distance

The purpose of the present study is to propose a new technical method for improving the fatigue life of a panel with big grooves by setting rounded transition structure and stress relief slots in the vicinity of it. The main idea of the method is to reduce the stress concentration at the edges of rounded transition structure. To confirm the effectiveness of the method, analyses were performed by using software for two-dimensional elastic problems based on the body-force method. The calculation results show that the existence of stress relief slots effectively reduced the stress concentration at the edges of rounded transition structure. A close distance between the rounded transition structure and the stress relief groove resulted in a little influence of stress concentration at the edge of rounded transition structure. Also, a lower stress concentration was obtained by increasing the diameter and numbers of stress relief grooves. Results prove the effectiveness and certain engineering practicability of this method. The method is helpful for structure design.

Improvement in very high cycle fretting fatigue strength using stress relief groove

2019 ◽  
Vol 2019 (0) ◽  
pp. PS02
Author(s):  
Naoki TONOOKA ◽  
Yoshinobu SHIMAMURA ◽  
Hitoshi ISHII ◽  
Toru YAGASAKI ◽  
Soichiro SUMIDA ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Stress Relief ◽  
Fretting Fatigue ◽  
Relief Groove ◽  
Very High ◽  
High Cycle Fretting Fatigue

scholarly journals B12 Effect of stress relief groove shape on fretting fatigue strength

2006 ◽  
Vol 2006.59 (0) ◽  
pp. 37-38
Author(s):  
Shunsuke Kataoka ◽  
Yoshihiro TAKATA ◽  
Masanobu KUBOTA ◽  
Chu SAKAE ◽  
Yoshiyuki KONDO
Keyword(s):  
Fatigue Strength ◽  
Stress Relief ◽  
Fretting Fatigue ◽  
Groove Shape ◽  
Relief Groove

Effect of Stress Relief Groove Shape on Fretting Fatigue Strength

2007 ◽  
Vol 353-358 ◽  
pp. 856-859 ◽  
Author(s):  
Shunsuke Kataoka ◽  
Chu Sakae ◽  
Masanobu Kubota ◽  
Yoshiyuki Kondo
Keyword(s):  
Fatigue Strength ◽  
Stress Relief ◽  
Groove Depth ◽  
Fretting Fatigue ◽  
Fatigue Tests ◽  
Analysis Model ◽  
Maximum Improvement ◽  
Pressure Concentration ◽  
Small Cracks ◽  
Relief Groove

The objective of this study is to evaluate the effect of stress relief groove on fretting fatigue strength. Fretting fatigue tests and finite element analyses were done. The shape of groove was controlled by groove radius R and tangential angle θ. The depth of groove was specified by R and θ. Fretting fatigue strength was increased with an increase of θ and then it turned into a decrease. The decrease was caused by the transition of failure mode from fretting fatigue at the contact part to plain fatigue at the groove root. The transition was caused by an increase of stress concentration at the groove root with an increase of the groove depth. Therefore, the maximum improvement of fatigue strength was achieved by the largest θ limited by fatigue strength of the groove root. In the analysis, the groove generates high compressive stress field at the contact edge, where small cracks never propagate. Therefore, assumptions to relieve the contact pressure concentration at the contact edge were taken into the analysis model. The values of stress intensity factor ranges for small cracks introduced near the contact edge were almost the same between grooved and non-groove specimens.

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