Mechano-regulation theory-based finite element analysis on the effects of driving strain history on cellular differentiation

2015 ◽  
Vol 16 (8) ◽  
pp. 1851-1858 ◽  
Author(s):  
Han-Young Lee ◽  
Ji-Hun Bae ◽  
Seung-Hwan Chang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cellular Differentiation ◽  
Strain History ◽  
Element Analysis ◽  
Regulation Theory ◽  
Régulation Theory

Multiaxial Fatigue Analysis on Reeled Steel Tube Umbilical

2011 ◽  
Author(s):  
Qingquan Li ◽  
Hezhen Yang ◽  
Huajun Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Fatigue Analysis ◽  
Steel Tube ◽  
Multiaxial Fatigue ◽  
Strain History ◽  
Critical Element ◽  
Load History ◽  
Element Analysis

Multiaxial fatigue analysis on reeled steel tube umbilical is proposed based on finite element analysis (FEA) results. Due to the complexity of the umbilical geometry, stresses and strains field becomes multiaxial, worsening the fatigue resistance. Reel-lay method, is one of the most efficient and cost-effective methods of pipeline installation. However, if installed by reel-lay method, material properties of the umbilical change may have an influence in fatigue performance of the line. Finite element analysis is applied with contact and formulation, and the load history through reel, aligner and straightener is simulated. The strain history of the whole modeling process in critical element is given, and the properties’ change after the load history is discussed. Then, principal stress criteria and Brown–Miller criteria (both combined with critical plane approach) based on FEA results were used to do fatigue life prediction of reeled and non-reeled model, respectively. The results indicate that reel-lay method does have a great influence on the fatigue life of steel tube umbilical, so the influence of installation on the umbilical fatigue must be considered when reel-lay method is adopted.

Multiaxial Fatigue Analysis on Reeled Steel Tube Umbilical

2013 ◽  
Vol 135 (1) ◽  
Author(s):  
Hezhen Yang ◽  
Qingquan Li ◽  
Huajun Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Fatigue Analysis ◽  
Steel Tube ◽  
Multiaxial Fatigue ◽  
Strain History ◽  
Critical Element ◽  
Load History ◽  
Element Analysis

Multiaxial fatigue analysis on reeled steel tube umbilical is proposed based on finite element analysis (FEA) results. Due to the complexity of the umbilical geometry, the stresses and strains field becomes multiaxial, worsening the fatigue resistance. The reel-lay method is one of the most efficient and cost-effective methods of umbilical installation. However, if installed by the reel-lay method, material properties of the umbilical change may have an influence in fatigue performance of the line. Finite element analysis is applied with contact formulation, and the load history through the reel, aligner, and straightener is simulated. The strain history of the whole modeling process in the critical element is given, and the properties' change after the load history is discussed. Then, the principal stress criterion and the Brown–Miller criterion (both combined with the critical plane approach) based on FEA results are used to do fatigue life prediction of reeled and nonreeled models. The results indicated that a reel-lay method has a great influence on the fatigue life of steel tube umbilical, so the influence of installation on the steel tube umbilical fatigue must be considered when the reel-lay method is adopted.

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