Is it possible to evaluate weld strength using FEA?
Is it possible to evaluate weld strength using FEA?
(OP)
Hello all
Is there any possibility\methodology to evaluate the strength of a weld using FEA softwares. Brief overview of the problem: A structure consists of sheet metal parts is failed when subjected to vibration test . The failure is observed because of welding. So is there possibility to evaluate this problem scenario in FEA??
Is there any possibility\methodology to evaluate the strength of a weld using FEA softwares. Brief overview of the problem: A structure consists of sheet metal parts is failed when subjected to vibration test . The failure is observed because of welding. So is there possibility to evaluate this problem scenario in FEA??





RE: Is it possible to evaluate weld strength using FEA?
RE: Is it possible to evaluate weld strength using FEA?
RE: Is it possible to evaluate weld strength using FEA?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Is it possible to evaluate weld strength using FEA?
For example, you could model a simple butt-weld (double-sided full-penetration weld) easily across two identically-sized pipe walls.
But if you try to use that simple an approximation for a fillet weld across a socket joint, where thicknesses and radius and internal openings and the back side of the weld are not "melted together uniformly", you'll get useless (wrong!) results.
RE: Is it possible to evaluate weld strength using FEA?
The failure is due to fatigue(high cycle). which is the correct way to approach the problem? I tried to simulate using dynamic frequency response analysis. But the maximum stress is not near to the expected weld area.
RE: Is it possible to evaluate weld strength using FEA?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Is it possible to evaluate weld strength using FEA?
RE: Is it possible to evaluate weld strength using FEA?
RE: Is it possible to evaluate weld strength using FEA?
1. Weld residual stresses caused by welding.
2. Weld toe dimensions as recommended by AWS specifications for groove welds.
3. Introduction of hot spot stress extrapolation points as recommended by DNV or many research papers related to FEM of welds.
4. Provide appropriate weld material properties.
5. If you like to opt for notch stress method, in that case you need to model a crack into your weld model and investigate the HSS.
HSS will be nothing but the weld strength. However, the method of loading and connection details determines whether your weld strength is in terms of shear or bending. Generally, groove welds resist bending while fillet welds resist shear.
Nevertheless, there are few points that still require answers from dear readers:
1. How many points are recommended to be introduced into the FEM Model around the periphery of a Tubular K-Joint for determination of Hot Spot Stresses?
2. If no weld is modelled at the joint. i.e. only the two extrapolation points are, would that affect the result for HSS?
RE: Is it possible to evaluate weld strength using FEA?
RE: Is it possible to evaluate weld strength using FEA?
RE: Is it possible to evaluate weld strength using FEA?
RE: Is it possible to evaluate weld strength using FEA?