In ABAQUS, how to apply a pressure field using vdload subroutine on a newly produced surface after deletion of elements from the top surface where the pressure field was actually applied? Or in other words, how to define a new surface for applying a pressure field, where the surface on which the pressure was initially applied is deleted with the evolution of damage.
RVE analysis becomes a routine exercise in material modeling. Usually it is carried out using finite element codes such as ABAQUS or ANSYS. The main thing one should pay attention is to applying the right boundary conditions. It is settled that periodic boundary conditions are the preferred boundary conditions to be applied. The BCs are that u_i-\epsilon_{ij}x_j should be equal on the corresponding edges. This type of boundary conditions can be applied using coupled equations constraints. This requires that one creates a mesh with corresponding nodes on periodic edges.
The effects of blast loading on structures can be very dangerous: damages and failures are expected with serious threats to structural safety and human life. Materials stresses and strains are often pushed to the limit and the modelling of these phenomena can be very complex. In order to design blast-resistant structures it is very important to determine what are the key parameters of this problem.
Dear all,
Currently I am engaged in solving a geological problem. So we have some soil model in the form of disk, there is a circular hole in the center, which has the initial pressure at the reference time (a modelling of the soil injection with the polymer compound)
How can I recalculate the normal pressure inside the circular hole of the soil model using the DLOAD subroutine if the neighbouring FEs were failed.
A finite element framework for distortion gradient plasticity with applications to bending of thin foils
Emilio Martínez-Pañeda, Christian F. Niordson, Lorenzo Bardella
International Journal of Solids and Structures
http://www.sciencedirect.com/science/article/pii/S0020768316301081
(A pre-print version is available at www.empaneda.com)
The definition of the size of the Representative Volume Element (RVE) is extremely important for the mechanics and physics of heterogeneous materials since it should statistically represent the micro-structure of the material. In the present contribution, a methodology based on statistical analysis and numerical experiments is proposed to determine the size of the RVE for heterogeneous amorphous polymers subjected to finite deformations.
Advanced energy materials hold one of the keys to fundamental advances in the conversion, storage, and harvesting of energy for a broad range of consumer electronics, automotive, aerospace, and defense applications. The successful development and deployment of these materials relies critically on a fundamental understanding of strongly coupled multiphysics phenomena. Mechanics of energy materials has emerged as a rapidly growing area of research that has significant technological implications in improving the efficiency, reliability, and sustainability of energy infrastructure.
Dear all, I want to simulate graphene layers in Abaqus/Explicit. To connect two layers, I follow van der Waals forces and apply non-linear spring elements. One problem I have faced is how to choose the unit scale when simulating. If I choose SI(m) or SI(mm), I can not get the visualization of simulation results. I have read some papers which talk about using A, ev/A and eV/A3 for length, force and Young's modulus.
Because I use non-linear spring element, I have to use Abaqus/Explicit. But to run Abaqus/Explicit, I have to define mass density of graphene layers.
A new computational technique for modeling dislocation interactions with shearable and non-shearable precipitates within the line dislocation dynamics framework is presented. While shearable precipitates are modeled by defining a resistance function, non-shearable ones are modeled by drawing a comparison between the two well-known Orowan and Frank–Read mechanisms. The precipitates are modeled directly within the dislocation dynamics analysis without the need for any additional numerical methods.
