Introduction to USDFLD and VUSDFLD Subroutine
Due to the increasing use of ABAQUS software subroutines, the need for learning has become mandatory. On the other hand, the complexity of some subroutines, such as UMAT, has made it difficult for many users to define the material properties. So, users use USDFLD subroutine instead of UMAT in many simulations.
In this subroutine, the properties of the material change to an arbitrary dependent variable.
The demo of this package is available on our YouTube Channel. You can find general information about this subroutine in Abaqus Documentation.
Workshop 1: Simulation of soil with mechanical behavior in different height with USDFLD
In the first workshop, the soil is subjected to compressive loading. The soil at different height has different elastic properties. This different elastic behavior will cause different stress distributions in the direction of height in the soil. This behavior is simulated by USDFLD subroutine.
Workshop 2: Thermomechanical Simulation of spherical FGM with crack with USDFLD
In the other workshop, a sphere with FGM properties with a crack on the outer surface is subjected to internal pressure and heat. The properties of FGM cause it to have different thermal and mechanical behavior along the radius. The TheUSDFLD subroutine written for the two material parameters exerts different properties along the radius.
Workshop 3: Blast on composite plate with cohesive using VUSDFLD
In this workshop, the damage behavior of composite material in explosion simulation has been implemented in the subroutine. In this subroutine, stiffness will be degraded based on Hashin failure criterion satisfaction.
Workshop 4: Fatigue simulation of Cohesive in single lap adhesive joint(VUSDFLD)
Finally, in a complex workshop, the VUSDFLD subroutine simulates adhesive fatigue in an adhesive bond. Khoramishad’s article has been used to simulate fatigue.
You can watch demo here.