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Non-parametric optimization of a clap skate using Tosca Topology

Posted by Christine Obbink-Huizer on Feb 6, 2018 9:56:34 AM

What do you do when you want to find a good design?

Have a brain storm session, come up with different designs, try each one out and choose the best one?

Or let the computer help you, by changing parameters such as dimensions and finding the design that matches the requirements best, possibly using Isight?

While such a parametric optimization is powerful in finding the best variation around a theme, non-parametric optimization can come up with a completely new theme: a new design concept. In this blog, we’ll take a look at non-parametric topology optimization using Tosca and Abaqus.

With the Winter Olympics coming up, being Dutch and in need of an applicable topic, we’ll use a Dutch invention; the clap skate (see Wikipedia) as example, and focus on the yellow part in the figure below.

First a regular Abaqus analysis is set up, and then Tosca is used to optimize the topology in this analysis.

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Topics: Abaqus, Topology Optimization

Join our online webinar: Vibrations and Acoustics with Abaqus FEA

Posted by Dolf Broekaart on Jan 22, 2018 10:15:12 AM

In the upcoming January webinar, we will look at the capabilities of Abaqus, with a focus on vibrations and Acoustics to understand noise and deminish its effects

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Topics: FEA, Abaqus

Join our "Introduction to Abaqus FEA" Classroom Training - 17,18,19 January

Posted by Dolf Broekaart on Jan 8, 2018 10:40:28 AM

At the 17th, 18th and 29st of January 2018, Simuleon will hold a 3-day classroom training at our location in Bruchem, The Netherlands. The training is called "Introduction to Abaqus FEA".

This course is a comprehensive and unified introduction to the modeling and analysis capabilities of Abaqus. It teaches you how to solve linear and nonlinear problems, submit and monitor analysis jobs and view simulation results using the interactive interface of Abaqus. The following products are covered by training: Abaqus/CAE, Abaqus/Standard and Abaqus/Explicit.

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Topics: introduction to Abaqus Training Course

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

Merry Christmas and a great 2018!

Posted by Dolf Broekaart on Dec 18, 2017 2:36:31 PM

 

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Topics: Abaqus, XFlow CFD

Modelling hyperelastic behavior using test data in Abaqus

Posted by Nikolaos Mavrodontis on Dec 11, 2017 5:51:49 PM

In this blog, the hyperelastic behaviour modelling in Abaqus will be discussed.  This will be implemented by fitting relevant experimental data with appropriate strain potential energy functions that are built-in in Abaqus and deciding on the function that best models the rubber materials behaviour. Additionally a finite element model will be demonstrated, wherein the designated material behaviour will be show cased.

Last but not least, in the process of explaining relevant aspects  of hyperelastic material modelling with Abaqus, various suggestions and good practices will be shared.

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Topics: Rubber, hyperelastics, test data

Join our online webinar: Complex Dynamics with Abaqus FEA

Posted by Dolf Broekaart on Nov 16, 2017 8:52:47 AM

In the upcoming november webinar, we will look at the complex dynamics capabilities of Abaqus, with a focus on workflows and tools available to simulate rotordynamic behaviour.

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Topics: FEA, Abaqus

How to submit and monitor Abaqus jobs through command window

Posted by Nikolaos Mavrodontis on Oct 30, 2017 12:17:31 PM

This blog focuses on  submitting an Abaqus job through the Command window and monitoring it without the Abaqus CAE interface.

Usually what most Abaqus users will do, in order to submit an analysis, is to create and submit the respectful job file when their preprocessing stage model is complete. This process is done in most cases through Abaqus CAE.
Subsequently the user will track the job monitor (accessible through the Job manager) in order to acquire valuable information regarding model related warnings and convergence performance of the solver.

However, there is quite often the need to submit a job file from the command window. The main reason behind this action, might as well be one of the following: ability to run several jobs simultaneously or sequentially, token re-allocation for extra CPUs in place of the CAE if the total number of tokens are limited, or if there are multiple Abaqus users occupying tokens etc.
The action of submitting a job through the CAE and the available options/outputs for monitoring the job’s progress through the Job monitor are features that can also be realized or accessed simply by the command window.

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Topics: submit monitor abaqus command window

Join our substructures and submodelling Webinar

Posted by Dolf Broekaart on Oct 23, 2017 2:00:46 PM

Simuleon hosts 10 Technical Webinar Training during a year as part of the paid online continual learning program. Costs for this continual learning program are EUR 1.175,00 for a full year. More information about the continual learning program can be found here.

Substructures & Submodelling with Abaqus FEA

October’s webinar will look at analysing large models using techniques such as substructures and submodelling. It will be held on Friday 27th October.

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Topics: submodelling, Abaqus Submodelling, Substructures

Python & Abaqus Scripting to automate your tasks

Posted by Dolf Broekaart on Oct 12, 2017 1:33:52 PM

Learning a new language can be fun and it is not as difficult as you may think. Language-learning is a gateway to new experience. It is true for any language and especially for a programming language. With our new online training course, we will guide you through your new challenge: learning Python and the Abaqus Scripting Interface.

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Topics: python, scripting

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