iMechanica - Mechanics of Structure Genome
https://imechanica.org/taxonomy/term/11200
enHow Can Machine Learning Help Composites Modeling?
https://imechanica.org/node/25466
<div class="field field-name-taxonomy-vocabulary-6 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/76">research</a></div></div></div><div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/11200">Mechanics of Structure Genome</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p><span>Our views on how one can leverage machine learning techniques to help constitutive modeling of composite materials are summarized in this paper<br /></span></p>
<p><span class="title-text">Xin Liu, Su Tian, Fei Tao and Wenbin Yu, A review of artificial neural networks in the constitutive modeling of composite materials, Composites Part B, vol. 224, 2021,109152. </span>
</p><p><a href="https://www.sciencedirect.com/science/article/pii/S1359836821005321">https://www.sciencedirect.com/science/article/pii/S1359836821005321</a>.</p>
</div></div></div>Fri, 01 Oct 2021 21:25:37 +0000Wenbin Yu25466 at https://imechanica.orghttps://imechanica.org/node/25466#commentshttps://imechanica.org/crss/node/25466Structure Genome: a Unified Multiscale Approach to Bridging Materials Genome and Structural Analysis
https://imechanica.org/node/24937
<div class="field field-name-taxonomy-vocabulary-6 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/76">research</a></div></div></div><div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/11200">Mechanics of Structure Genome</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>After almost seven years development, we have achieved more and more clarity with the concept of structure gene and it governing principles (mechanics of structure genome). My recent talk on MSG summarizes its relations with materials genome, common structural theories, micromechanics, multiscale modeling, as well as its current application to deployable structures, homogeneous 3D elements, machine learning assisted multiscale modeling. You can watch this talk at Youtube <a href="https://www.youtube.com/watch?v=7d5LuQrLpCM&t=5s">https://www.youtube.com/watch?v=7d5LuQrLpCM&t=5s</a>. If you cannot access Youtube, you can watch it on cdmHUB at <a href="https://cdmhub.org/resources/1940/video?resid=1941&time=00:00:01">https://cdmhub.org/resources/1940/video?resid=1941&time=00:00:01</a>.</p>
</div></div></div>Sat, 06 Feb 2021 16:00:36 +0000Wenbin Yu24937 at https://imechanica.orghttps://imechanica.org/node/24937#commentshttps://imechanica.org/crss/node/24937AIAA Online Short Course on Multiscale Structural Mechanics
https://imechanica.org/node/24169
<div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/12805">multiscale structural mechanics</a></div><div class="field-item odd"><a href="/taxonomy/term/11200">Mechanics of Structure Genome</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p><span>AIAA Materials Technical Committee will present an AIAA online short course on Multiscale Structural Mechanics starting on August 5th, 2020. More details can be found at </span><a href="http://aiaa.mycrowdwisdom.com/diweb/catalog/item?id=5196778">http://aiaa.mycrowdwisdom.com/diweb/catalog/item?id=5196778</a></p>
</div></div></div>Tue, 05 May 2020 18:52:42 +0000Wenbin Yu24169 at https://imechanica.orghttps://imechanica.org/node/24169#commentshttps://imechanica.org/crss/node/24169A Better Alternative to RVE Analysis
https://imechanica.org/node/20517
<div class="field field-name-taxonomy-vocabulary-6 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/76">research</a></div></div></div><div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/11200">Mechanics of Structure Genome</a></div><div class="field-item odd"><a href="/taxonomy/term/18">micromechanics</a></div><div class="field-item even"><a href="/taxonomy/term/11391">composites.</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p><span>RVE analysis is popular for computational homogenization. It can be used independently for virtual testing or as a module for multiscale modeling. Its popularity is mainly due to the maturity and acceptance of commercial finite element software. RVE analysis usually requires a 3D domain to obtain 3D properties and local fields. If a 2D RVE is used, only 2D properties and local fields are obtained. To obtain the complete set of properties, multiple analysis is needed. For example, to obtain the complete stiffness matrix, six 3D RVE analyses are needed. The main drawbacks are the computational cost, and difficulty in applying the right boundary conditions. </span></p>
<p>The recently discovered mechanics of structure genome (MSG) and its companion code SwiftComp, when specialized to 3D structures, can provide a general-purpose micromechanics theory. Many examples, including the <a href="https://cdmhub.org/projects/mmsimulationchalleng">micromechanics simulation challenge</a> have been used to demonstrate that MSG/SwiftComp is more versatile, efficient, and simpler than RVE analysis with out lossing any accuracy and geometric modeling flexibility. More detailed comparison between MSG and RVE analysis can be found <a href="https://cdmhub.org/blog/2016/10/rve-analysis-vs-mechanics-of-structure-genome">here</a>. <span>SwiftComp can be freely launched in the cloud at </span><a href="https://cdmhub.org/resources/scstandard">https://cdmhub.org/resources/scstandard</a><span>. In other words, one can run a super-efficient "RVE analysis" on any devices including smart phones and tablets connected to Internet via a browser. Various GUIs are available for users to choose from including Gmsh, TexGen, ANSYS, and ABAQUS4, all of which are free available on </span><a href="http://cdmhub.org/">cdmHUB</a><span>. </span><span> </span></p>
</div></div></div>Thu, 27 Oct 2016 02:37:07 +0000Wenbin Yu20517 at https://imechanica.orghttps://imechanica.org/node/20517#commentshttps://imechanica.org/crss/node/20517RVE analysis without BCs and periodic mesh requirements
https://imechanica.org/node/20013
<div class="field field-name-taxonomy-vocabulary-6 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/76">research</a></div></div></div><div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/18">micromechanics</a></div><div class="field-item odd"><a href="/taxonomy/term/934">Composites</a></div><div class="field-item even"><a href="/taxonomy/term/1092">constitutive modeling</a></div><div class="field-item odd"><a href="/taxonomy/term/11200">Mechanics of Structure Genome</a></div><div class="field-item even"><a href="/taxonomy/term/11201">SwiftComp</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>RVE analysis becomes a routine exercise in material modeling. Usually it is carried out using finite element codes such as ABAQUS or ANSYS. The main thing one should pay attention is to applying the right boundary conditions. It is settled that periodic boundary conditions are the preferred boundary conditions to be applied. The BCs are that u_i-\epsilon_{ij}x_j should be equal on the corresponding edges. This type of boundary conditions can be applied using coupled equations constraints. This requires that one creates a mesh with corresponding nodes on periodic edges. For real, complex microstructures, this could be a challenge. Another issue that with a 2D RVE analysis, one can only obtain in-plane properties and local fields, for 3D properties and local fields, 3D RVE analysis are always needed. Six 3D analyses are needed to compute the complete set of 3D elastic properties. Another analysis is needed to compute the local fields for each global state. </p>
<p>A recently developed general-purpose multiscale constitutive modeling code called SwiftComp based on <a href="http://imechanica.org/node/18928">Mechanics of Structure Genome</a>, can be used for micromechanics which is essentially a RVE analysis for dummies. The user does not have to specify the boundary conditions and periodic mesh is not required. All the user has to do is to provide the finite element mesh as input. Another unique feature of SwiftComp is that it can compute complete set of 3D properties from a 2D RVE if the material features 2D periodicity such as unidirectional fiber reinforced composites. All the properties are computed within one analysis and thus it is at least six times more efficient than traditional 3D RVE analysis. The code can be launched freely in the cloud at <a class="js-link post-link" href="http://www.linkedin.com/redir/redirect?url=https%3A%2F%2Fcdmhub%2Eorg%2Fresources%2Fscstandard&urlhash=O970&_t=tracking_anet" target="_blank">https://cdmhub.org/resources/scstandard</a> or used as a plugin for ABAQUS or ANSYS. You are welcome to try it to see the difference from the RVE analysis you are familiar with. </p>
<p> </p>
</div></div></div>Sun, 19 Jun 2016 21:56:48 +0000Wenbin Yu20013 at https://imechanica.orghttps://imechanica.org/node/20013#commentshttps://imechanica.org/crss/node/20013Error | iMechanica