You may be trying to use any FEM software for simulation. Some basic information on modeling welding heat sources (including conical heat source) is given in the following NPTEL online course. If you are using ANSYS software, the APDL language can be used for modeling.

The course referred in my previous answer is

Heat sources NPTEL Online course on Analysis and modeling of welding

G. Phanikumar

Dept. of MME, IIT Madras

First, I want to say thank you for your suggestion, Sir.

But I am already using a dedicated weld simulation software for the welding process. In which, they suggested some empirical relationship and formula for conventional welding process bur there is no relationship for EBW and LBW welding process.

And by the Micrograph result, how do I take the parameters??

There are no guidelines.

Could you help me to decide on those parameres??

Your answer needs more explanation.

1. Is it a FE simulation software or it uses the basic theory of welding heat flow ( presented first by Rosenthal in 1936!)? That theory is good enough to predict cooling rate etc. somewhat away from weld source. It ultimately results in formulae for cooling rate (and some other parameters) and is applicable for any type of heat source, provided you consider the parameter somewhat away from the heat source. Such analysis has been used successfully for weldability prediction etc. in low alloy steels (not for steels etc. where reaction in molten region influences the final results). Thus it all depends on what for are you using the heat flow analysis.

2. Input of weld pool parameters is possible only in elaborate FE analysis. If you are doing that then the parameters given in the reference are useful, which are, of course, to be determined from micrograph of weld pool. For complete reference on this matter as to how to determine these parameters you will have to go through the actual journal paper (I think one good paper was published in Welding Journal _ unfortunately I do not have complete details of that reference with me right now.

I hope this has answered your query.

Yes, sir,

It is a FEM simulation software. i.e. SIMUFACT.Weld.

Rosenthal 1936 paper was 1st paper for heat source modelling I already read in which he was assumed heat source as a point heat source for the simplifying problem.

Further the development of heat source point-line-disc-circular-elliptical-double elliptical- Conical- a hat with conical- nailhead etc. for heat source modelling.

In my FEM software, two types of heat source are used.

1. Goldak Doubble ellipsoidal Model

2. Conical Heat Source Model

No of papers is available for Goldak double ellipsoidal model parameter

but for conical I couldn't. very less with no explanation of how do I choose parameters.

Dear Vinay

I have not gone through this particular software and do not know how it has modeled conical heat source. They might have explained the method of supplying the data for such heat source in the users manual. I still feel a general purpose software like ANSYS may be more appropriate for understanding the basics and using various strategies for modeling weld pool.

What I meant by my other statement is that finding very exact temperature distribution in weld pool and around it with excessive computational effort (as number of researchers have tried) is worth only if the results are used for some final objective, otherwise it become an academic exercise only.

However, I could locate the paper on modeling conical and other modified heat source, which I referred in my previous reply, in my record and the same is enclosed. Hope it may be useful to you. Best wishes.