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Study of the Residual Stress Effect of Welding Process on the Life Estimation of Submarine

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Year: 2017
COI code: WMECH04_033
Paper Language: English

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Authors Study of the Residual Stress Effect of Welding Process on the Life Estimation of Submarine

  Seyed Meysam Hosseini - Department of Mechanical Engineering, K.N.Toosi University of Technology, Tehran, Iran
  Ebrahim Alizadeh - Fuel Cell Technology Research Laboratory, Malek Ashtar University of Technology, Fereydoonkenar, Iran
  Mohammad Rezaei Firouzjaee - Fuel Cell Technology Research Laboratory, Malek Ashtar University of Technology, Fereydoonkenar, Iran
  S.H Masrori Saadat - Researcher, Fuel Cell Technology Research Laboratory, Malek Ashtar University of Technology, Fereydoonkenar, IslamicRepublic of Iran

Abstract:

This paper investigated the effect of residual stress due to welding on the submarine remaining life estimation,according to fracture mechanics. After determining the critical zone of the U-100 submarine pressure hulls, that usedby the Germans during the Second World War, by putting the hypothetical cracks in the pressure hulls, the stressintensity factor ,the bending stress intensity factor and the residual stress intensity factor caused by welding processesare calculated. The effect of each stress intensity factors parameters are investigated on the total stressintensity factor. The stress intensity factors and bending stress intensity factors are calculated using finite elementmethod and the results are compared with the calculated analytical results. The results revealed that the finite elementmodel has good accuracy. Then, using the finite element results and the Paris laws, submarine life was calculated.Finally it was concluded that the residual stress intensity factor caused by welding processes has the most portions inthe total stress intensity factor of the structure and it will significantly reduce the life of the submarine. It is notablethat the ABAQUS v 6.14 is used for finite element method.

Keywords:

Submarine, Fracture mechanic, Finite Element Method, Life prediction, Stress Intensity Factor

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COI code: WMECH04_033

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Hosseini, Seyed Meysam; Ebrahim Alizadeh; Mohammad Rezaei Firouzjaee & S.H Masrori Saadat, 2017, Study of the Residual Stress Effect of Welding Process on the Life Estimation of Submarine, Biennial International Experimental Solid Mechanics Conference, تهران, دانشگاه علم و صنعت ايران, https://www.civilica.com/Paper-WMECH04-WMECH04_033.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Hosseini, Seyed Meysam; Ebrahim Alizadeh; Mohammad Rezaei Firouzjaee & S.H Masrori Saadat, 2017)
Second and more: (Hosseini; Alizadeh; Rezaei Firouzjaee & Masrori Saadat, 2017)
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Paper No.: 9408
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