UMESHMOTION subroutine in ABAQUS

The Abaqus user subroutine allows the program to be customized for particular applications unavailable through the main Abaqus facilities. You should write a user subroutine if you could not run your analysis by ABAQUS built-in models for materials, loads, properties, elements, etc., for example, if you need to model a user-defined nonlinear stress-strain relation, which is not provided by Abaqus, then look for UMAT user subroutine. A more advanced subroutine is UMESHMOTION, which allows the creation of user-defined meshing. If it is your first time writing a subroutine like UMESHMOTION, please read the Start Writing an Abaqus Subroutine: Basics & Recommendations article. If you are not familiar with writing the subroutine, you can read this article Fortran ‘Must Knows’ for Writing Subroutines in Abaqus for Fortran.

After reading this post and watching this tutorial’s demo video, you will definitely decide to save time in Abaqus modelling and get this Abaqus UMESHMOTION manual package. If you have questions, ask here on our live chat on the left side of this page.

1. An investigation was done on the wear simulation of artificial knee joints. The investigators used the ABAQUS software and UMESHMOTION subroutine to evaluate the wear of artificial joints. The UMESHMOTION subroutine was used to update the geometry of the contact area. This is the important Abaqus user subroutine example.
2. A research was done about Fretting wear finite element analysis under variable coefficient of friction. The fretting wear may cause losing fasteners or other problems; moreover, it is challenging to measure micromotion in experiments; So, FEM simulation and the ABAQUS subroutine can analyze its behavior. The UMESHMOTION subroutine executed the continuous change of the contact surface geometry.
3. An investigation was done to evaluate the time-variant burst strength of corrosion-defect-ridden pipe under high internal pressure. The mechano-electrochemical interaction was simplified in a new numerical model that was created. A user-defined UMESHMOTION subroutine implemented the damage progression of corrosion, which was controlled by a stress corrosion model.
4. Surface topography significantly influences how wear-resistant contact surfaces are. Smooth surfaces are less resistant to wear than non-smooth surfaces. In this study, the surface of a quadrangular pit created by ball-end milling was examined for sliding wear characteristics. The sliding wear process was analyzed using finite element simulation under dry friction using the ABAQUS software’s UMESHMOTION subroutine and the Archard wear model. The association between the quadrangular pit size and wear resistance was discovered by combining the analysis of the contact area, contact pressure, wear zones, and relative wear rate of the quadrangular pit topography with varied sizes.
5. The aviation and aerospace industries make extensive use of aluminum alloys due to their superior mechanical properties and reduced density as compared to other metals. One of an aluminum alloy’s most crucial characteristics in real-world applications is fatigue performance. In hostile environments, corrosion pits can form and spread on the surfaces of materials. An enhanced pit evolution model and a CDM technique were coupled in a study to examine the pit-to-crack transition in an aluminum alloy. The stresses and strains of a specimen with pits were calculated using the coupled elasto-plastic damage constitutive model. By taking into account the impacts of fatigue damage and cyclic multiaxial loads, the pit evolution model was enhanced. ABAQUS was used to implement numerical simulations. The coupled elasto-plastic damage constitutive model, two fatigue damage evolution models, and the pit growth model were implemented using the user subroutines UMAT and UMESHMOTION, respectively.