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Nikolaos Mavrodontis

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Recent Posts

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

Abaqus 2019 - Key Features & How to Download

Posted by Nikolaos Mavrodontis on Dec 7, 2018 5:12:10 PM

Abaqus 2019 is now available. In this blog, we 'll list the most significant new features and enhancements, and explain how to obtain and install Abaqus 2019.

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Topics: Abaqus 2019

Fully coupled thermal structural analysis with Abaqus

Posted by Nikolaos Mavrodontis on Oct 29, 2018 4:59:38 PM

In this post, we will be showing some of the capabilities of Abaqus for performing fully coupled thermal-structural analyses. In particular, an exemplary geometry of a mountain bike's perforated disc together with the breaking pads (included in the caliper-not modelled) will be used to show some of Abaqus' conjugate heat transfer and multiphysics capabilities.

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Topics: Abaqus, thermal-stress, thermal-structural

Modeling Bolted Connections with Abaqus FEA

Posted by Nikolaos Mavrodontis on Sep 18, 2018 9:15:15 AM

In this blog post, we will be discussing about the different methods in modeling bolted connections with Abaqus FEA. At the last section of the post,we will be showcasing a bolted connection, incorporating a pretensioned bolt. Flanged connections are used extensively in most engineering disciplines. They provide a way of interconnecting  various (metallic, plastic etc.) components and their design is often critical for the strength of various components (e.g. bolt strength) and sealing of the assembly. 

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Topics: Abaqus Bolt Loads, bolted connections

Symmetric model generation with Abaqus

Posted by Nikolaos Mavrodontis on Aug 6, 2018 5:04:11 PM

In this blog post we will be discussing about the symmetric model generation feature that is incorporated in Abaqus. This feature is targeted towards reducing the solution time needed for an analysis. We will first present the supported features and limitations, followed by an exemplary analysis of a flanged connection wherein this feature can be used.

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Topics: Abaqus, symmetric model

Abaqus Associative Interface for SOLIDWORKS

Posted by Nikolaos Mavrodontis on Jun 6, 2018 2:04:00 PM

In this post, we will be highlighting the installation and use of the CAD associative interface for interconnecting Solidworks with Abaqus. By using the CAD interface, geometry modifications performed with Solidworks can be transfered in the Abaqus CAE with a push of a button without the need for manually updating previously assigned boundary conditions or interactions.

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Topics: Abaqus, solidworks, associative interface

Concrete frame under earthquake loading using Abaqus

Posted by Nikolaos Mavrodontis on May 4, 2018 8:27:00 AM

In this post, we will be demonstrating the setup of an earthquake analysis. The structure to be investigated will be a concrete frame. The earthquake input signal will have the form of an acceleration time history (lateral accelerations vs time) with a signal frequency of 100 Hz.

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Coupled Thermal-Stress Analysis and Expansion Joints in Abaqus

Posted by Nikolaos Mavrodontis on Mar 6, 2018 9:46:24 AM

In this post we will be showing an exemplary analysis with Abaqus Standard. This analysis will incorporate a coupled thermal-stress problem of  a cylindrical shell (e.g. a pipe enclosing a high temperature fluid used in a factory). This pipe will be connected to a metallic expansion joint that will have the purpose of undertaking the thermal extension of the pipe. The purpose of the coupled analysis will be to demonstrate the mapping of result values via the predefined field option.


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Topics: Abaqus, thermal-stress, expansion

Xflow CFD demonstrating the Magnus effect

Posted by Nikolaos Mavrodontis on Jan 2, 2018 8:46:46 AM

In the current post, we will be focusing on introducing XFlow CFD by demonstrating an aerodynamic effect primarily observable in spheres or cylinders following certain trajectories while spinning at the same time.

This effect is known as the Magnus effect, associated with spinning objects. A sphere for example travelling through mid-air while spinning at the same time , will drag air faster around one of its sides. This will consequently create a pressure gradient between the sides of the sphere, thus creating a lift force that will alter the sphere’s trajectory compared to a case with no spin.  The lift force generated is equivalent to that of an airfoil, only the origin of the necessary air recirculation around the body is by mechanical rotation (the spin)  and not by aerodynamic design ( the airfoil).

XFlow is a next generation CFD software based on the Lattice-boltzmann method designed for a broad range of computational fluid dynamics simulations. XFlow’s  latest release supports coupling with Abaqus for performing fluid structure interaction analyses.

The Magnus effect will be demonstrated with a spinning football analysis in XFlow.

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Topics: XFlow CFD

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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