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Nikolaos Mavrodontis

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Recent Posts

Performance assessment of a Peristaltic Pump

Posted by Nikolaos Mavrodontis on May 22, 2020 11:37:02 AM

In this blog post, we will be showcasing a fully coupled fluid structure interaction (FSI) analysis, of a peristaltic roller pump. This study will focus on assessing the performance of a peristaltic pump, under operation. This co-simulation analysis, will solve for both the structural and fluid domains' unknown quantities, during 1 revolution of the rotating mechanism of the pump.

This is an example of a challenging application, in which numerical modelling and computer simulations can provide a lot of insight and value.

The aspects we want to evaluate in this digital model are; determining the volume flow-rate for a given rotation speed, assessing contact stress areas on the tube, and determining the torque output for the given rpm.

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Topics: Abaqus, FSI, XFlow CFD, Tips, Tricks & Approaches, Peristaltic Pump, Co-Simulation

Kinematic vs Distributed coupling constraints in Abaqus

Posted by Nikolaos Mavrodontis on Apr 7, 2020 9:30:00 AM

In this blog post, we will be discussing the differences between the kinematic and distributing constraints in Abaqus. The differences between these types of constraints will be highlighted in an example model.

Introduction and Usage

Surfaced based coupling constraints are used in Abaqus for the following purposes:

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Topics: Abaqus, Tips, Tricks & Approaches, distributed coupling, kinematic coupling, constraints

Generating FEA reports with Abaqus

Posted by Nikolaos Mavrodontis on Mar 9, 2020 3:10:36 PM

In this blog post, we will be showcasing the Abaqus Report Generator plugin (RGP), that is by default included in the Abaqus product installation. The RGP allows the user to create an HTML report using model and results data. The capabilities and functionality of this plugin will be demonstrated with an exemplary results database.

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Topics: Abaqus, html, 3dxml, report generator plugin

Modelling a composite flanged tube including loading with Abaqus/CAE

Posted by Nikolaos Mavrodontis on Mar 3, 2020 8:52:44 AM

In this blog, we will be providing information on the modelling of laminated composites with Abaqus. Modelling will be done using the composite layup tool, and material orientations will also be assigned.

Those modelling features will be demonstrated with a relevant example case of a composite flanged tube under loading. The tube will be subjected to thermal and radial pressure loading.

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Topics: Abaqus/CAE, composite analysis, ply, flange, tube, laminated, fibre, matrix, carbon, epoxy

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

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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