Design of Welded Joints: Weld Joint Design for Static and Fatigue Loading

2021 ◽  
pp. 353-362
Author(s):  
Dheerendra Kumar Dwivedi
Keyword(s):  
Weld Joint ◽  
Welded Joints ◽  
Fatigue Loading ◽  
Joint Design

STUDY ON FATIGUE BEHAVIOR OF STRENGTHENED NON-LOAD-CARRYING CRUCIFORM WELDED JOINTS USING CARBON FIBER SHEETS

2012 ◽  
Vol 12 (01) ◽  
pp. 179-194 ◽  
Author(s):  
TAO CHEN ◽  
QIAN-QIAN YU ◽  
XIANG-LIN GU ◽  
XIAO-LING ZHAO
Keyword(s):  
Stress Concentration ◽  
Carbon Fiber ◽  
Welded Joints ◽  
Failure Modes ◽  
Fatigue Behavior ◽  
Local Stress ◽  
Fatigue Loading ◽  
Cfrp Sheets ◽  
Load Carrying ◽  
Weld Toe

This paper reports an experimental study on the use of carbon fiber-reinforced polymer (CFRP) sheets to strengthen non-load-carrying cruciform welded joints subjected to fatigue loading. Failure modes and corresponding fatigue lives were recorded during tests. Scatter of test results was observed. Thereafter, a series of numerical analyses were performed to study the effects of weld toe radius, the number of CFRP layers and Young's modulus of reinforced materials on local stress concentration at a weld toe. It was found that fatigue life of such welded connections can be enhanced because of the reduction of stress concentration caused by CFRP strengthening. Parametric study indicates that the weld toe radius and the amount of CFRP are the key parameters influencing the stress concentration factors and stress ranges of the joint. Enhancement of modulus for adhesive and CFRP sheets can also be beneficial to the fatigue performance to some extent.

Process analysis and regression modelling of resistance spot welded joints of austenitic stainless steel 304L and low carbon steel sheets by using surface response methodology

2020 ◽  
pp. 095440892094088
Author(s):  
Lokesh Boriwal ◽  
RM Sarviya ◽  
MM Mahapatra
Keyword(s):  
Mathematical Model ◽  
Process Parameters ◽  
Weld Joint ◽  
Welded Joints ◽  
Joint Strength ◽  
Process Analysis ◽  
Dissimilar Material ◽  
Joint Analysis ◽  
Low Carbon ◽  
Spot Welded

Evaluating the strength performance of spot-welded joints of dissimilar material is critical for their continued integration into the automobile and aerospace industries. The effect of weld joint strength is an important consideration in the design of weld structures. The objective of the present work undertaken to investigate the effect of the input process parameters on the strength of the welded joint of dissimilar material. Full factorial design (FFD) has used for designing the experiment matrix. Further, experimental results have used to develop a mathematical model to predict the strength of the spot weld joint. Analysis of Variance (ANOVA) has been applied to establish the correlation between the process parameters and their interaction on the output. The confirmation test case experiments have conducted for validating the developed mathematical model and observed that the developed model is capable of evaluating weld joint strength within the process parameters.

Effects of Filler Metal on the Microstructures and Properties of 2519A/7A52 Weld Joint

2012 ◽  
Vol 602-604 ◽  
pp. 2136-2139
Author(s):  
Zhong Ju Hu ◽  
Hao Huang ◽  
Hong Gang Zhou
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
Grain Refinement ◽  
Weld Joint ◽  
Welded Joints ◽  
Filler Metal ◽  
Welding Wire ◽  
Brittle Phase ◽  
Strength And Ductility ◽  
Better Than

2519A/7A52 aluminum alloys were welded by using ER4043 and ER2319 welding wires with the method of MIG. The mechanical properties, microstructures as well as fracture of welded joints were studied. The results show that the welding wire of ER2319 is favorable for grain refinement of welding structures, and the strength and elongation of the joint are better than that welded by ER4043 welding wire. While for the use of ER4043, the strength and ductility of joint decline due to the generation of Si-rich brittle phase, and the fracture of weldment is mostly brittle type.

scholarly journals Notch effect of welded joint

2018 ◽  
Vol 165 ◽  
pp. 21003 ◽  
Author(s):  
Vladimír Chmelko ◽  
Matúš Margetin ◽  
Michal Harakal’
Keyword(s):  
Residual Stress ◽  
Fatigue Life ◽  
Weld Joint ◽  
Welded Joints ◽  
Structural Changes ◽  
Welded Joint ◽  
Base Material ◽  
Notch Effect ◽  
Internal Defects ◽  
Technological Factors

In general, the welded joints are multifactorial notches. This study is focused to separate the geometrical influence (when the weld can be seen on the surface) and technological factors (internal defects of the weld, structural changes of the material and residual stress) on its fatigue life. Proposed methodology of this separation comes out from the cyclic test of three specimens – group with existing weld, group without weld joint (base material) and another group where was removed outer geometry of the weld.

Nanoindentation investigation on the creep behavior of P92 steel weld joint after creep-fatigue loading

2020 ◽  
Vol 134 ◽  
pp. 105506 ◽  
Author(s):  
Zengliang Gao ◽  
Yuxuan Song ◽  
Zhouxin Pan ◽  
Jianan Chen ◽  
Yi Ma
Keyword(s):  
Creep Behavior ◽  
Weld Joint ◽  
Fatigue Loading ◽  
Steel Weld ◽  
P92 Steel ◽  
Steel Weld Joint ◽  
Creep Fatigue
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