Notes from WelSim

May 28, 2023

Window design and development for general-purpose simulation software

Modern simulation engineering places high demands on software design and functionality. Not only do softwares need to provide extensive a...

May 21, 2023

Design and development of context menu in simulation software

Modern engineering simulation imposes higher requirements on software design and functionality. While also providing extensive features, ...

April 28, 2023

Multi-step and time-varying settings in dynamics simulation

Nowadays, it is often vital to set multi-step conditions and time-varying boundary conditions when modeling real engineering problems. Th...

April 21, 2023

Generate SU2 solver scripts using WELSIM

SU2 is an open-source CFD solver originally developed by Stanford University. With the continuous efforts of developers and users in rece...

April 5, 2023

WELSIM releases 2023R2, supporting open-source electromagnetic simulation solver

The general-purpose engineering simulation software WELSIM has released the latest version 2023R2 (internal version 2.6). Compared with t...

April 3, 2023

Rigid body and dynamics in structural finite element analysis

Modern finite element analysis often involves multiple bodies. When the structure has strong stiffness and is not the main concern, we ma...

March 17, 2023

Generating the solver input scripts of the computational electromagnetics software Palace using WELSIM

On February 22, 2023, AWS released its open-source project Palace for large-scale parallel computing electromagnetics. Palace is used at ...

March 10, 2023

WELSIM provides free engineering simulation software to companies suffer from Silicon Valley Bank shutdown

February 27, 2023

Implicit and explicit dynamics in finite element analysis

There are a large number of transient problems in the fields of engineering simulation and scientific computing, which requires appropria...

January 30, 2023

WELSIM releases 2023R1 to better support finite element analysis of complex structures

The general engineering simulation software WELSIM has released the latest version 2023R1 (internally v2.5). Compared with the previous v...

January 4, 2023

Run OpenRadioss solver for explicit dynamics analysis using WELSIM

OpenRadioss is an explicit dynamics solver based on the finite element method that was open-sourced by Altair Engineering Inc. (NASDAQ: A...

December 3, 2022

WELSIM released 2.4 to better support the open-source simulation community

The general-purpose engineering simulation software WELSIM has released the latest version 2.4. Compared with the previous version, versi...

November 26, 2022

Use MatEditor to generate OpenRadioss material data files

OpenRadioss is an open-source enterprise-grade explicit dynamics analysis software. Due to its powerful features and long history, OpenRa...

November 22, 2022

Elastoplastic Models in Structural Finite Element Analysis

Plastic forming is one of the most important processing methods in modern industry. As small as spring winding, as large as automobile bo...

November 15, 2022

Damage and Failure Criteria in Structural Analysis

With the development of simulation technology, engineers and scientists are more and more interested in damage, fracture, failure, destru...

October 18, 2022

Equations of State (EOS) in Shock and Explosion Analysis

Shock and explosion are common subjects in modern engineering simulation. There have been many successful applications ranging from cell ...

October 4, 2022

ParaView Data (pvd) file format and writing

ParaView is a powerful and open source 3D data visualization tool. Users can apply its 3D interaction or batch processing features to qui...

September 8, 2022

Generate FrontISTR mesh and input scripts using WelSim

FrontISTR is a well-known free and open-source finite element analysis software. Since 2005, when the Japanese Ministry of Education fund...

August 21, 2022

Generate MFEM initial mesh file using WELSIM

MFEM ( is one of the most active open-source partial differential equation (PDE) solver projects in recent years. Although this ...

August 11, 2022

The numerical methods applied in curve fitting and the updates of CurveFitter

With the development of big data and computational science, data mining and analysis tools play an increasingly important role. For gener...

July 29, 2022

WelSim opens the source of the official website

Nowadays, no software product can be apart from open source projects or communities, and many large software and technology cooperations ...

July 25, 2022

WELSIM R2.3 boosts meshing speed using HDF5 data exchange format

The latest release boosts meshing using the HDF5 data exchange format.

May 15, 2022

WELSIM R2.2 enhances result view controlling features

The latest release enhances complex result view controlling features.

December 15, 2021

WELSIM R2.1 expands post-processing capabilities

Latest release boosts complex post-processing simulation capabilities.

September 11, 2021

A beam cross-section calculator - BeamSection

The beam is a specific structure commonly used in engineering. The beam can be made as an independent beam or can be combined with other ...

July 13, 2021

Three-dimensional electrostatic analysis using finite element method

Modern electromagnetic research has penetrated various fields. In recent years, with the rapid development of new technologies such as 5G...

July 9, 2021

An easy-to-use and free curve fitting tool — CurveFitter

Curve fitting is a numerical process often used in data analysis. Its essence is to apply a certain model (or called a function or a set ...

June 30, 2021

Curve Fitting for the Core Loss Model

The core loss of magnetic components plays an important role in engineering practices. Particularly at high-frequency conditions, the los...

June 15, 2021

Ogden Hyperelastic Model for Nonlinear Finite Element Analysis

In previous articles, we have introduced Arruda-Boyce, neo-Hookean, Mooney-Rivlin, Yeoh, Gent, Blatz-Ko and other hyperelastic models tha...

June 13, 2021

Blatz-Ko hyperelastic model for nonlinear finite element analysis

We have introduced the hyperelastic models commonly used in finite element analysis such as Arruda-Boyce, neo-Hookean, Mooney-Rivlin, Yeo...

May 28, 2021

Gent hyperelastic model for nonlinear finite element analysis

In previous articles, we introduced Arruda-Boyce, neo-Hookean, Mooney-Rivlin, and Yeoh hyperelastic models. Today, let’s discuss another ...

May 25, 2021

Yeoh hyperelastic model for nonlinear finite element analysis

Previously, we discussed the Arruda-Boyce, neo-Hookean, and Mooney-Rivlin models. In this article, we will be talking about the Yeoh hype...

May 24, 2021

Mooney-Rivlin hyperelastic model for nonlinear finite element analysis

In previous articles, we have introduced the hyperelastic model in nonlinear finite element analysis, and also introduced the well-known ...

April 17, 2021

Neo-Hookean hyperelastic model for nonlinear finite element analysis

In structural finite element analysis, non-metal materials such as rubber and biological tissues are often encountered. Because the mecha...

March 15, 2021

Hyperelastic material model Arruda-Boyce for Nonlinear Finite Element Analysis

In structural finite element analysis, non-metallic materials such as rubber and biological materials are often encountered. Because the ...

July 23, 2020

Hyperelastic Material Models and Curve Fitting

When a finite element analysis model contains hyperelastic materials, engineers usually have little substantial data to help get the resu...

November 15, 2019

New Features of Finite Element Analysis Software WELSIM v1.9

September 25, 2019

A Free Material Editing Tool - MatEditor

In engineering practices, various materials are often dealt with. So, it’s always essential for engineers to accurately and quickly defin...

July 18, 2019

Nonlinear problems in thermal finite element analysis

Thermal (also called heat transfer) analysis is one of the commonly encountered analyses in engineering. Thermal analysis is used to pred...

July 17, 2019

Multi-step quasi-static structural finite element analysis

With the development of finite element analysis technology, engineers are no longer satisfied with the one single step static analysis. T...

July 7, 2019

The time-domain transient method in structural finite element analysis

Transient structural analysis (also known as dynamic analysis) is a method used to determine the dynamic response of a structure over tim...

July 4, 2019

Set the maximum and minimum values of finite element analysis results in WELSIM

In the finite element analysis, the result always has a range. Whether it is the deformation, strain, stress in structural analysis, the ...

June 17, 2019

A Free Unit Converter App for Engineers

In the engineering design and calculation practice, various unit systems will be encountered. It is very important to convert these engin...

June 7, 2019

Modal Finite Element Analysis of Rotating Machine Blades

The blade design plays an essential role in the operation of the rotating machine. For example, the centrifugal force will increase as th...

June 5, 2019

Modal Finite Element Analysis of A Turbine Rotor

The goal of the modal analysis is to get the mode shape and natural frequency of a structure. The calculated stress, strain, and displace...

February 1, 2019

Linear Dynamics Analysis in WELSIM

Transient structural analysis is used to study the dynamic response of structures that are subjected to loads in the time domain. The tra...

August 1, 2018

Hertz Contact Analysis in WELSIM

The Hertz contact theory is a study of the local stress and strain distribution law when two objects contact with pressure. In 1881, H.R....

July 1, 2018

Export result data in VTK format from WELSIM

VTK (Visualization Toolkit) is an open source and object-oriented software system for computer graphics, image processing, visualization....

June 15, 2018

Export TECPLOT result file from WELSIM

Tecplot is a versatile data analysis and visualization software. Tecplot can display from 2D curves to complex 3D dynamic contours. It fe...

June 1, 2018

Finite element meshing of STL models using WELSIM

The STL file format (stereolithography) is an interface protocol developed by 3D SYSTEMS in 1988. It is a 3D graphics file format for rap...

May 15, 2018

Use SSH to run the graphical applications remotely

Linux SSH provides powerful remote access capabilities. Users can quickly access other Linux machines, such as clusters, using SSH comman...

May 1, 2018

Using WELSIM on the Linux CentOS 7

WELSIM v1.7 recently announced the support of the CentOS 7 operating system, which is followed by the previously supported Ubuntu and Fed...

April 15, 2018

Download and Install Finite Element Software - WELSIM

Recently, we have received many questions about acquiring and installing WELSIM. Everyone is welcome to download, install, and use this s...

April 1, 2018

Finite Element Analysis of Plate and Shell Structure

The plate and shell structure is a structure in which the dimension in the thickness direction is much smaller than the size in the lengt...

March 30, 2018

Install finite element analysis software WELSIM on your Linux OS

WELSIM has released the Linux version at the March of 2018, the first supported distributions are Ubuntu 16.04 and Fedora 27. Today I wil...

March 23, 2018

WELSIM for Linux OS is launched

March 15, 2018

Finite Element Analysis of Centrifugal Force of Rotating Machinery Blades

There are a large number of rotating machinery in industrial practices, such as fans, compressors, pumps, centrifuges, steam turbines, et...

March 1, 2018

Structural Statics Analysis Tutorial for Assembly using WELSIM

The structural analysis of the assembly using WELSIM is straightforward. The main steps are: (1) define the materials; (2) create geometr...

February 15, 2018

Finite Element Analysis of Frame Structure Under Body Force

The frame structure is widely used in engineering and often seen in large and medium-sized buildings such as stations, ports, and industr...

February 1, 2018

Modal Analysis on a Tuning Fork using WELSIM

Modal analysis plays an important role in the structural analysis. Many essential components or entire machine designs need to avoid the ...

January 15, 2018

Heat Transfer Analysis for A Composite Wall using WELSIM

The furnace is one of the most commonly used equipment in the industry. The gas burned in the furnace combustion chamber is discharged th...

January 1, 2018

Stress Analysis and Verification of Rectangular Plate with Circular Hole Using WELSIM

Plate structure with holes is widely applied in engineering practices. The reason making holes on the plate could vary, some for installi...

December 15, 2017

Reaction Force Analysis for Assembly Using WELSIM

In structural mechanics analysis, we are often interested in the reaction of the structure at the fixed end, in addition to the conventio...

December 1, 2017

How to properly open a finite element simulation archive file with the suffix “wsdb”

The workload of finite element analysis is relatively large. Engineers will add many settings and variables in the analysis process. If t...

August 15, 2017

WELSIM v1.2 introduces thermal analysis

The latest release boosts complex engineering simulation with thermal analysis capabilities.

July 7, 2017

WELSIM v1.1 expands nonlinear structural analysis

Latest release boosts complex engineering simulation with nonlinear solver capabilities.

July 7, 2017

Structural analysis of a mechanical connector using WELSIM

The metal connector is widely applied in the mechanical engineering. As shown in the figure below, a typical connector has elbow shape, t...

June 1, 2017

Structural analysis on plate with a central single circular hole

In this essay, we demonstrate a stress analysis of a plate with a central single circular hole subjected to axial loads. The aim of this ...