Dload Subroutine for implicit model

Here is a tutorial to explain the Dload subroutine in Abaqus using an example of a moving load (train wheel) on a rail. We show the details of the model. The model files are provided on the website link at the end of the description. The geometry for each component is created. The material properties were assigned to each component. In the assembly section, we show how they are put together. We used the implicit step as it provides faster results for a longer process compared to the explicit step. We mesh each component based on its application. In the load and BC section, we offer the necessary details as well as the gravity force. We explained each part in detail so you can understand the model.

More details about the Dload subroutine

Dload subroutine code is one of the simplest subroutine codes to start learning. It is developed for Abaqus standard and implicit models, which cover many applications. One of the advantages of using the implicit solver is its short simulation time. However, it doesn’t necessarily mean that it can be faster than explicit models all the time. This solver helps solve models that do not have large deformations but require a long step period. In some cases, such as the movement of train wheels on a railroad track, which requires modelling various components, or simulating the movement of a vehicle on the iron rail, it is beneficial to use the Abaqus implicit solver. It helps avoid simulating every component, so it reduces computational time. You can use this subroutine to define complex mechanical loads for your model with minimum effort. It is worth mentioning that the usage of Dload is similar to VDload, and most of the variables are the same.

In this video, we avoid giving too many details so you can easily use the product.