It depends on your topics, but in general, I think Solidworks and Abacus are more user-friendly.

Thank you docteur Amin for your answer.

Dear Salah Amroune

The kind of you'r work is very important, Each Software has its own characteristics. You can get help from similar old works.

Thank you docteur Elmira for your answer.

Dear Salah Amroune

Both of FEA codes Ansys and Abaqus gives useful results, depends the user skills and knowledge's. for me i prefer Ansys APDL (for structural studies), because this program have a library of element types, where it leads to specify your study and minimize the time of calculation and obtain the needed results.

there are another points ......

Thank you Docteur Merzoug for your answer

The only difference is how you want to use it, and also how much you care about the details and if you are really proficient in using software for deep analysis or you just have a simple task to execute.

Thank you for the answer Docteur Idriss.

I agree with @Amin Ghaffarzadeh Bakhshayesh, @Elmira Ghazanfari Jajin and @Idriss Tibakh. The choice of software stems from the objects/processes to be analyzed, accuracy requirements and what software is used by other researchers/engineers who work on the same topics. I would also suggest FreeCAD (https://www.freecadweb.org/), Range Software (https://www.range-software.com/) and Calculix (http://www.calculix.de/) which are free and open-source programs. Range Software is really user-friendly.

Thank you for the answer and your suggestions Docteur Aleksei.

The diffrent of those solvers is function and task for example Ansys is consist of multy codes based on FVM and FEM but Abaqus is only FEM etc.

Dear, Salah Amroune

Abaqus FEA is a set of computer simulation programs (product suite) that applies the finite element method to perform linear and nonlinear static structural calculations, including dynamic simulation of impacts, solid contact problems, thermal, acoustic couplings- structural, fluid mechanics, piezoelectric and others. It consists of four products: Abaqus / CAE (CAE being the acronym for "Complete Abaqus Environment"), Abaqus / CFD (acronym for "Computational Fluid Dynamics"), Abaqus / Standard and Abaqus / Explicit.

While ANSYS, Inc. ANSYS is divided into three main tools called modules: pre-processor (geometry creation and meshing), processor, and post-processor. Both the pre-processor and the post-processor are provided with a graphical interface. This finite element processor for solving mechanical problems includes: analysis of dynamic and static structures (both for linear and non-linear problems), analysis of heat transfer and fluid dynamics, and also acoustic and electromagnetism problems. Normally the use of these tools is used simultaneously, managing to mix structural problems with heat transfer problems as a whole. This software is also used in civil and electrical engineering, physics and chemistry.

CATIA (computer-aided three-dimensional interactive application) is a commercial computer-aided engineering, manufacturing, and design software developed by Dassault Systèmes. The program is developed to provide support from design conception to production and product analysis. It is available for Microsoft Windows, Solaris, IRIX, and HP-UX.

It provides an open architecture for the development of applications or to customize the program. The application programming interfaces, CAA2 (or CAAV5), can be programmed in Visual Basic and C ++. It was initially developed to serve the aeronautical industry. Great emphasis has been placed on handling complex surfaces. CATIA is also widely used in the automotive industry for the design and development of bodywork components. Specifically, companies such as the VW Group (Volkswagen, Audi, SEAT and Škoda), BMW, Renault, Peugeot, Daimler AG, Chrysler, Smart and Porsche make extensive use of the program. The construction industry has also incorporated the use of software to develop buildings of great formal complexity; the Guggenheim Museum Bilbao, in Spain, is an architectural landmark that exemplifies the use of this technology.

Today CATIA developers continue to innovate their software. The CATIA-V5-6R2019 version is in development; a new immersive collaboration experience where teams can collaborate using virtual reality that connects them via "plug and play" (a screen to put on the HTC Vive head) to immediately go to a shared virtual reality experience in the one that will be able to walk and interact with the product.

While SolidWorks is CAD (Computer Aided Design) software for 2D and 3D mechanical modeling, currently developed by SolidWorks Corp., a subsidiary of Dassault Systèmes (Suresnes, France), for the Microsoft Windows operating system. Its first version was launched on the market in 1995 with the purpose of making CAD technology more accessible. The program allows you to model parts and assemblies and extract from them both technical drawings and other information necessary for production. It is a program that works based on new modeling techniques with CAD systems. The process consists of transferring the mental idea of ​​the designer to the CAD system, "virtually building" the part or set. Subsequently, all the extractions (plans and exchange files) are carried out in a fairly automated way

https://www.google.com/search?q=abaqus+vs+ansys&sxsrf=ALiCzsbMM3MHwzhlax75rsBvsDL9TvegcQ:1669137152765&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjhqcm4pML7AhUBi_0HHe16BtoQ_AUoAnoECAEQBA&biw=853&bih=571&dpr=1.5#imgrc=crCqqn6K-5FcAM

Dear Salah Amroune ,

All software gives good results in all fields, the best software is one in which you enjoy working.