Material modelling

In this post, we explore how to integrate a neural network in a user material subroutine (UMAT) for CalculiX. The main idea is that the material’s plastic behavior is learned by a neural network and embedded into the UMAT code, in combination with a classic linear elastic model. We’ll use a UMAT example with the […]

Converting user material subroutines from ABAQUS to CALCULIX can significantly boost flexibility in open-source finite element simulations. Thanks to the ABAQUS UMAT examples shared on GitHub and similar platforms, it is often easier to start from an existing model than to build one from scratch. In this post, we explore how to adapt one of

This blog explains how to compile CALCULIX. This is a critical point required for introducing new user subroutines. The blog is not a comprehensive guide; it is only a description step-by-step of the procedure that we have followed, as an example of the process. Move to /usr/local Edit Make.inc Change: Make the library Unpack Modify

This blog initiates a series of post about creating user material subroutines, with illustrative examples. Finite element software, as ABAQUS or CALCULIX supports advanced material modeling through user-defined subroutines, specifically the User Material (UMAT). These subroutines allow for defining complex material behaviors not included in the material models library. In this article, we provide an overview of

Ever wondered how engineers and researchers can test the strength and durability of concrete before it’s even mixed? Enter VCCTL (Virtual Cement and Concrete Testing Laboratory), a powerful tool that allows you to model and analyze the mechanical properties of concrete before it’s even mixed. Let’s dive into how you can leverage VCCTL to develop