Composite Modelling of different RVE sizes

This video is an #ABAQUS tutorial investigating the effect of Representative Volume Element (RVE) size on composite modelling. The composite material studied is a unidirectional composite and three RVE sizes were investigated. The study revealed that RVE size does matter especially in the post-yield or damage evolution part of the stress-strain plot.

Virtual domain of the randomly distributed fibres was created using #MontCarlGen2D which is a software that is developed by CM Videos. Also, periodic boundary conditions were imposed on the domain using another CM videos developed software called #PBCGenLite. These software (where available) can be developed using the link below.

Contour plots were generated from the study which showed different crack evolution patterns as you change from one RVE size to another. Also, stress-strain plots from the study showed the quantitative evidence that RVE size does matter both in elastic and onset of yield (though minimal) and also post-yield response (quite significant). The implication of this study is that modellers must objective determine the appropriate RVE size that is suitable for a given simulation not just for elastic properties but also post-yield response of a test material. #cmvideos #abaqus #rvemodelling #udcomposites

Time stamps
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You can quickly navigate through the videos using these chapters.

00:00 Intro
01:01 Virtual domain
01:21 Analysis Framework
01:24 MonteCalGen2D v1.0
01:54 PBCGenLite v1.0
02:27 Material: GFRP
02:50 Case studies investigated
03:08 ABAQUS + MontCalGen: Virtual Domain creation
08:34 ABAQUS: Extracting History variables from Corner Nodes
11:28 PBCGenLite: PBC application
13:10 MATLAB: Submitting ABAQUS jobs within MATLAB
17:00 ABAQUS: Visualize Results
19:02 Principle of finding stress and strain from simulations
21:04 ABAQUS: Extracting stress and strain from simulations
25:58 Comparison of stress-strain plots
26:30 Answer: "Does RVE size matter?"
27:50 Outro
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📥* DOWNLOADABLE RESOURCES
Please click on this link for Python Scripts, Excel spreadsheet and ABAQUS model used in the video. https://tinyurl.com/fwapked5

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📥* DOWNLOAD LINK TO SOFTWARE
*PBCGenLite: A software for implementing Periodic Boundary Conditions on 2D RVEs (https://cmvideos.ck.page/products/pbc...)
*MontCarlGen2D: A software for creating random inclusions in 2D RVEs. (COMING SOON)

✔️*RELATED VIDEOS
💻: RVE Modelling of Unidirectional Composites in ABAQUS:    • RVE Modelling of Unidirectional Composites...  
💻: How to manually apply Periodic Boundary Conditions in ABAQUS    • How to manually apply Periodic Boundary Co...  
💻: How to AUTOMATICALLY apply PBCs in ABAQUS using PBCGenLite    • How to AUTOMATICALLY apply PBCs in ABAQUS ...  
💻: MontCarlGen2D: A software for implementing the Monte Carlo Methods for Micromechanics. (Video coming soon)

✔️*Link to Michael Okereke's Finite Element Applications textbook
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Okereke, M. and Keates, S., 2018. Finite element applications. Cham: Springer International Publishing AG. https://link.springer.com/book/10.100...

✔️*REFERENCE JOURNALS CITED IN THIS VIDEO
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Okereke, M.I. and Akpoyomare, A.I., 2013. A virtual framework for prediction of full-field elastic response of unidirectional composites. Computational materials science, 70, pp.82-99. (https://tinyurl.com/4bjz6tyj)

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Become a CM Video Insider (100% free) to access modelling resources, advanced workshops, bonus trainings, behind the scene contents and regular CM Video updates: https://cmvideos.ck.page/16a99bd0e3

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