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Hi all, I'm working on a simulation of a reinforced concrete beam in bending. It's a 2D-model, where i want to simulate the discrete cracking pattern of the beam in a 4-point bending test. I created a cohesive zone model to describe the descrete cracking pattern. However this model does not...

Hi all, I created a UMAT, that is used for lineair softening of a material in tension and shear (2D). For small models this UMAT works just fine, and correct results are obtained. However when using the UMAT in a larger model (+- 1500 UMAT elements, 1500 standard Abaqus material elements). i...

Hi all, For my research i want to model a bi-lineair softening curve of a cohesive element (see image below). This should be able to be modelled in Abaqus CAE with a tabular damage evolution. However the Abaqus user manual gives a formula to calculate the damage parameter for lineair...

Hi all, I have a problem to define the cohesive law for 2 sets of interface elements in Abaqus CAE (version 6.11.2). I know how to define a lineair elastic- and softening domain. But for my model i need the cohesive laws as shown in the image below. The pull-out behaviour (red line in the...

Hi all, I'm trying to model a 2D cohesive layer with a zero-thickness in Abaqus (6.11.2) The shape of the layer is a quarter circle. When modelling this i first create a cohesive layer with a certain thickness. I then convert the part of this cohesive layer to a orphan mesh, then edit the...

Hi all, I'm working on a 2D model in Abaqus 6.11.2 with a cohesive surface in it. This cohesive surface has the shape of a quarter circle. Due to this shape the cohesive surface is loaded from perpendicular (90 degrees angle) to parallel (0 degrees angle) to the surface. However the model does...

For my graduation project I’m working on a model to describe cracking behavior. For this model I want to model a fibre-epoxy interface, see the attached figure 1 (due to symmetry only a quarter is modeled). The fibre part is modeled with lineair elastic material. The epoxy part is modeled with...

Hi all, I previously used a cohesive surface in a model to describe interface behaviour of my model. However the cohesive surface gave inacurate results (peak stresses). Therefore i want to create a model with cohesive elements instead of cohesive surfaces since the cohesive elements do not...

Hi all, I'm working on a study with cohesive elements and cohesive surfaces in it. However when studying the cohesive elements in Abaqus i found that the behavior is not as i expected. I'm using a traction seperation diagram to model the behavior (input=energy, thus area under the...

Hi all, I'm currently working on a model where i want to model cracking of a fibre-epoxy interface. I did model the fibre-epoxy interface with a cohesive surface. Ater initial debonding between the epoxy and fibre, the cracking is expected to continue in the epoxy material. The cracking of the...

Hi all, I'm dealing with the following problem: I'm relative new to Abaqus, to get used to moddeling cracks in Abaqus, I want to model a crack in a epoxy interface as described in: Alfaro, M.Suiker, A. (2010) Transverse Failure Behavior of Fibre-epoxy Systems, Journal of Composite Materials...