T-stub behaviour under out-of-plane bending. I: Experimental research and finite element modelling

2015 ◽  
Vol 98 ◽  
pp. 230-240 ◽  
Author(s):  
Beatriz Gil ◽  
Rufino Goñi
Keyword(s):  
Finite Element ◽  
Experimental Research ◽  
Finite Element Modelling ◽  
Element Modelling ◽  
Out Of Plane ◽  
Plane Bending

scholarly journals Inherent possibilities and limitations of finite element modelling of defective girth welds

2010 ◽  
Vol 1 (1) ◽  
pp. 127-135
Author(s):  
Stijn Hertele ◽  
Wim De Waele ◽  
Rudi Denys ◽  
Matthias Verstraete
Keyword(s):  
Finite Element ◽  
Crack Growth ◽  
Experimental Research ◽  
Finite Element Modelling ◽  
Experimental Validation ◽  
Stable Crack Growth ◽  
Worst Case ◽  
Element Modelling ◽  
Numerical Research ◽  
Girth Welds

Welds unavoidably show defects, which can negatively affect the integrity of the entire structureand, worst case, result in a failure. Defects of a considerable size should therefore be detected, assessedand, if necessary, repaired. The assessment of a defect requires a procedure which allows a conservativeestimation of the acceptability of the defect. To develop such procedure, both experimental and numericalresearch is performed. This paper describes the inherent possibilities and limitations of numerical researchthrough finite element modelling, as compared to experimental research. Summarizing all arguments, itbecomes clear that numerical research is a highly powerful tool, but a thorough experimental validation is ofparamount importance. Moreover, some specific weld-related problems are highly difficult to address,namely the presence of stable crack growth and material heterogeneity. More research is needed toachieve a description of these phenomena, under a set of conservative assumptions.

Initial imperfections and the initiation of wrinkling in finite element modelling of deep drawing

2000 ◽  
Vol 214 (1) ◽  
pp. 63-73 ◽  
Author(s):  
J Hematian ◽  
P M Wild
Keyword(s):  
Finite Element ◽  
Deep Drawing ◽  
Finite Element Modelling ◽  
Annular Plate ◽  
Finite Element Models ◽  
Essential Requirement ◽  
Element Modelling ◽  
Initial Imperfections ◽  
Different Types ◽  
Out Of Plane

The effect of initial imperfections on the initiation of wrinkling in finite element models of deep drawing operations is assessed. Models of an annular plate are subjected to radial in-plane loading and the effects of different types, magnitudes and distributions of imperfections are investigated. A model of a circular plate subjected to out-of-plane loading from a punch and die is similarly investigated and the results are compared with experimental data. It is confirmed that initial imperfections are an essential requirement for the initiation of wrinkling for the case of in-plane loading. Initial imperfections are shown to be unimportant in the initiation of wrinkling for the case of out-of-plane loading.

Development of Resistant Spot Welding Technology for Automotive Ferrite-Martensitic Dual-Phase Steels with Joint Application of Finite Element Modelling and Experimental Research

2016 ◽  
Vol 1138 ◽  
pp. 43-48 ◽  
Author(s):  
László Prém ◽  
Zoltán Bézi ◽  
András Balogh
Keyword(s):  
Finite Element ◽  
Experimental Research ◽  
Resistance Spot Welding ◽  
Finite Element Modelling ◽  
Spot Welding ◽  
Energy Input ◽  
Dual Phase ◽  
Element Modelling ◽  
Continuous Energy ◽  
Welding Technology

In this paper spot-welding technology of sheets made of Dual-Phase (DP) steel, which is one of the most important materials in the automotive industry, has been analyzed using finite element modelling and experimental research. The traditional, continuous energy input and the symmetric double pulse as non-continuous energy input were compared for resistance spot welding focusing on the advantages of pulsed energy input. For numerical analysis an axisymmetric coupled finite element model was developed to study the effect of welding time and current intensity on nugget size and thermal history in resistance spot welding process using MSC.Marc software package. The cross-section macrostructures of the welded specimens were examined and compared to the predicted size of the weld nugget and heat affected zone.

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