<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hello,<div class=""><br class=""></div><div class="">I am looking to perform large scale fracture and crack propagation simulations and have a few questions regarding PETSc support for this. Specifically I am looking for cohesive surface element support with a few twists:</div><div class=""><br class=""></div><div class="">1. Is there support for zero thickness surface elements? For example modeling virtually flat patches of adhesives holding together two larger structures being pulled apart.</div><div class="">2. Is there support for “joining” two possibly distinct meshes with cohesive surface elements? For example say I have two distinct cylinders representing fibers which would “touch" to form an X shape.</div><div class="">3. In a similar vein, is there support for a mesh to fracture entirely along a crack formed through the cohesive elements? Imagine the aforementioned X configuration separating entirely into two separate cylinders again.</div><div class="">4. Is there a mechanism by which you can classify existing elements as cohesive elements?</div><div class="">5. Is there an already implemented way of imposing tie-constraints between independent meshes? This would potentially be used to tie high order cohesive cells which would have a non-conforming interface to the “regular” mesh.</div><div class=""><br class=""></div><div class="">From googling I have come across DMPlexCreateHybridMesh(), DMPlexConstructCohesiveCells(), and DMPlexCreateCohesiveSubmesh(). While these do implement cohesive cells these functions don’t at first glance seem to allow one to implement the above. </div><div class=""><br class=""><div class="">
<div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div>Best regards,<br class=""><br class="">Jacob Faibussowitsch<br class="">(Jacob Fai - booss - oh - vitch)<br class="">Cell: (312) 694-3391</div></div>
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