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Nikolaos Mavrodontis

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Recent Posts

Abaqus Hardening Laws on single element model

Posted by Nikolaos Mavrodontis on Jan 21, 2020 9:15:00 AM

In this blog post, we will be discussing about some of the most commonly used hardening laws that are available within Abaqus, and can be deployed whenever a metal’s plastic (inelastic) behavior and the nature of the applied load (monotonic, cyclic) becomes relevant in the modeling.

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Topics: Abaqus, hardening laws, hardening

Adding translucency for enhanced post processing in Abaqus

Posted by Nikolaos Mavrodontis on Nov 11, 2019 4:59:31 PM

In this blog post, we will be discussing about the translucency feature, that is there to help us enhance the results presentation of our fe analyses from within Abaqus Visualization.

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Topics: Abaqus, postprocessing, translucency, visualization

Fatigue assessment of a bicycle frame done with Abaqus and Fe-Safe

Posted by Nikolaos Mavrodontis on Oct 8, 2019 9:41:00 AM

In this blog post, we will be showcasing a fatigue assessment of a bicycle frame. This fatigue assessment will be against certain cyclic loading scenarios. Cyclic loading scenarios, typical for bicycle manufacturers, can include, pedaling forces, horizontal forces acting on the front fork and vertical load acting on the seat post.

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Topics: Abaqus, fe-safe, fatigue, bike, frame

Abaqus ODB Extractor and Builder Tool (OEBT) Plug-in

Posted by Nikolaos Mavrodontis on Sep 17, 2019 9:40:00 AM

On many occasions, particularly when our model size is large or when automatically generated Field/History outputs are used by default, the resulting output database of an analysis can be of significant size. Typically (at least for quasi-statics, statics), the user is mainly interested in retaining the first and/or last frames of generated output, as the main focus is the final deformed configuration, when a loading has been fully ramped up (100% loading). Additionally, when automatically generated output requests are used, predefined default output variables are written in the results database, whereas the user might only have interest in von Mises stresses and resulting displacements in the model.

In this blog post, we will be showcasing the OEBT plug-in, that allows the user to select the specific results that they would like to keep, and populate them in a new results' database. 

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Topics: Abaqus, plug-in, ODB Extractor and Builder Plug-in

Abaqus plug-in utilities

Posted by Nikolaos Mavrodontis on Aug 13, 2019 9:15:34 AM

In this blog post, we will be showcasing some of the plug-ins, available for Abaqus.

A plug-in essentially is a small piece of software installed into another application (Abaqus in this case) in order to extend the application’s capabilities.

 Typically, plug-ins are categorized either as kernel plug-ins or as GUI plug-ins. The first ones consist of functions written using the Abaqus Scripting Interface. GUI plug-ins contain commands that create Graphical User Interfaces.

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Topics: Abaqus, plug-in

Subsea modeling with Soil and Structure interaction in Abaqus - Part 1

Posted by Nikolaos Mavrodontis on Aug 5, 2019 8:53:29 AM

Offshore and subsea structures have been constructed and commissioned for many decades now, resulting in quite innovative and mature technologies.

These structure types are subjected to loads of different nature. Therefore there is the need for developing methods, that allow for a structural assessment under serviceability loads, in a quick but also accurate way.

Particularly, for subsea structures focused on oil extraction from reservoirs, lying under the seabed, interaction with the surrounding soil becomes of critical importance.

In this blog post, we will be investigating a drilling wellhead under external load action while also incorporating the behavior of the surrounding fully saturated soil from the seabed, in terms of nonlinear springs.

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Topics: Abaqus, non-linear springs, wellhead, Soil Structure Interaction, soil represented as spings

Modeling of steel fibre-concrete composites including concrete damage with Abaqus

Posted by Nikolaos Mavrodontis on Jun 17, 2019 2:44:29 PM

This blog post, constitutes a continuation of the previous blog post,regarding modeling of steel fibre reinforced-concrete composites with Abaqus. In the current blog post, we will be showing an exemplary steel fibre composite pull out test, in a 3 dimensional model, wherein,also damage of the concrete matrix, is included.This is realised by using the Concrete Damage Plasticity model, available in Abaqus. 

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Topics: Abaqus, damage, steel fibre concrete composites, concrete

Modeling of steel fibre-concrete composites with Abaqus

Posted by Nikolaos Mavrodontis on May 14, 2019 9:18:53 AM

In this blog post, we will be discussing about steel fibre reinforced concrete (termed as SFRC) and will be showcasing a way (more modelling ways do exist)  to model the interaction between the steel fibre (reinforcement) and the concrete (matrix).

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Topics: Abaqus, steel fibre, pull-out test, concrete composite

Geometry Operations in Abaqus FEA software

Posted by Nikolaos Mavrodontis on Mar 5, 2019 9:51:00 AM

In this blog post, we will be discussing about geometry operations on 3d models, that have been imported in Abaqus as a neutral geometry format, or via the Associative Interface (if you are interested more about the AI, have a look at an earlier blogpost). We will be showing the different tools available in order to detect geometry issues in the imported model (Geometry diagnostics tool, accessible via the Query tool) as well as fix geometry issues from within Abaqus (Geometry Edit toolset, accessible through the Part module in Abaqus).

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Topics: Abaqus, Abaqus geometry edit and repair

Fatigue analysis with fe-safe

Posted by Nikolaos Mavrodontis on Jan 7, 2019 4:48:52 PM

In this post, we will be highlighting the main features of Simulia's fatigue prediction software, fe-safe. Fe safe performs both strain and stress based fatigue calculations, incorporating many different fatigue algorithms (uniaxial strain and stress based, biaxial strain and stress based, advanced thermomechanical fatigue, elastomer fatigue, fatigue of welds etc.). Last but not least, a fatigue calculation example will be shown. This concerns a notched plate under a cyclic fully reversing (tensile-compressive) load.

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Topics: Abaqus, fe-safe, fatigue

About our FEA Blog:

Simuleon blog topics related to Finite Element Analysis like; Structural Analysis and CFD analysis performed with SIMULIA Abaqus FEA, XFlow CFD, Isight Simulation Automation, Tosca Topology Optimization and Fe-Safe accurate Fatigue.

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