• RecurringMeetings
• 2016-12-14

Recurring Meeting of Cleveland Clinic - University of Utah

Date: December 14, 2016

Time: 2:00 PM EST

Means: Conference call

Attendees:

1. Ahmet Erdemir (Cleveland Clinic)
2. Steve Maas (University of Utah)
3. Ben Ellis (University of Utah)

Agenda:

1. Ongoing and planned activities at Cleveland Clinic.
2. Ongoing and planned activities at University of Utah.
3. Other.

Immediate Action Items:

• University of Utah (Steve)
  • Continue generalization of wrapping spring elements feature for nonlinearity and for model setup.

Notes:

1. Ongoing and planned activities at Cleveland Clinic.
   • Ahmet provided the latest update on cloud computing and reminded Steve about the sample cloud computing model.
   • Ahmet mentioned that Ben Landis, from his group, is mostly working on evaluation of FEBio for various features. He told Steve that Ben may contact him regularly.
2. Ongoing and planned activities at University of Utah.

   • Steve has implemented the part feature. You can export the part individually or as an instance, similar to other finite element analysis software. You can move the instance and rotate it using quaternions. Other rotation descriptors can be added in future. FEBio manages part definitions by pre-processing the input file to generate a global mesh definition. The output does not provide part definitions but sets are inherited. Steve is currently working on PreView support.

   • Steve did not have a chance to work on wrapping springs.
   • Related to shell formulations, Steve mentioned that the next release of FEBio, scheduled for January, will have the new formulation. This formulation is essentially a thick shell formulation.
3. Other.
   • Ahmet asked about membrane elements, i.e. elements that do not support bending or compression, which can be used for simulations of balloon inflation, skin, etc. Steve responded that such an element type does not exist in FEBio. Ahmet, Ben, and Steve discussed potential workarounds, e.g. defining thin shell elements with anisotropic properties. Steve indicated that these may have locking issues and an element-by-element definition of local directions may be necessary.
   • Ahmet also asked about prism elements, e.g. extrusions of triangles - 2 triangular, 4 quadrilateral sides. Steve noted that these element types are available in FEBio, they are possibly called as wedge or pentahedral elements.