Search found 73 matches

Go to advanced search

by sodelo
Fri Apr 07, 2017 5:24 am
Forum: FEM
Topic: Element Membrane M3D6
Replies: 13
Views: 479

Re: ERROR : too many cutbacks

Hi, I suspect you face a problem of material instability (well known for elasto-plasticmaterials). - Please try first with an elastic material --> it should cpnvergence with the static solver - then for a elasto-plastic material (for example sigma=KEps^n). I do not exactly remember the formula but i...
by sodelo
Mon Apr 03, 2017 7:34 pm
Forum: FEM
Topic: Cauchy ou Piola-Kirchoff stress?
Replies: 2
Views: 172

Re: Cauchy ou Piola-Kirchoff stress?

Hi Groguigui, Guido is really the best guy to answer your questions. He is obviously very good in his field. Could you please describe your reference solution and how you want to simulate it with Calculix? There are many opportunities to make mistakes. Freecad just displays Calculix results. So Cauc...
by sodelo
Tue Mar 21, 2017 6:58 am
Forum: FEM
Topic: Creating a group of nodes for a volume
Replies: 8
Views: 254

Re: Creating a group of nodes for a volume

Thanks to both of you for your help.
by sodelo
Mon Mar 20, 2017 7:42 pm
Forum: FEM
Topic: Creating a group of nodes for a volume
Replies: 8
Views: 254

Re: Creating a group of nodes for a volume

Thanks for the information.
So there is no simple workaround since I need a node set and not an element set.
by sodelo
Mon Mar 20, 2017 7:01 pm
Forum: FEM
Topic: Creating a group of nodes for a volume
Replies: 8
Views: 254

Creating a group of nodes for a volume

Is there a simple way to define a Boundary conditions for a group of nodes related to a volume?
I tried different ways without success (Fem Mesh Group or Node Sets). In the end, I do not find the node set in the Input file.

Thanks,

Sodelo
by sodelo
Mon Mar 20, 2017 1:12 pm
Forum: FEM
Topic: Rigid body and Reference node
Replies: 10
Views: 360

Re: Rigid body and Reference node

You want to simulate the testing of a specimen with a fixed displacement. You wan to know the reaction force. One option is to sum all the reaction forces on the nodes where the displacement is applied but this is not convenient. Another option is to create a rigid body at the extremity and to impos...
by sodelo
Mon Mar 20, 2017 1:04 pm
Forum: FEM
Topic: Rigid body and Reference node
Replies: 10
Views: 360

Re: Rigid body and Reference node

You want to simulate the impact of a car against a wall. Assume the wall is very rigid in comparison to the car. You can use the following model. crash.png In that case you define a rigid body between the wall nodes and the reference node. You give the car an initial velocity and the reference node ...
by sodelo
Mon Mar 20, 2017 12:55 pm
Forum: FEM
Topic: Rigid body and Reference node
Replies: 10
Views: 360

Re: Rigid body and Reference node

Imagine you want to simulate the mechanical testing of this specimen: cct1.jpg And the testing configuration is this one: images.jpg The specimen is loaded thanks to 2 axes. The distance between them is increased during the testing. To simulate this, you can describe the specimen, the 2 axes and use...
by sodelo
Mon Mar 20, 2017 12:42 pm
Forum: FEM
Topic: Dynamic change of object properties
Replies: 3
Views: 148

Re: Dynamic change of object properties

Maybe this approach is not the correct one and a dialog box would be preferable to handle the different options. I am having a look at Qt Designer and at the way the material property dialog is defined. I may have some questions ....
by sodelo
Mon Mar 20, 2017 12:38 pm
Forum: FEM
Topic: Importing Equivalent Plastic Strain
Replies: 34
Views: 953

Re: Importing Equivalent Plastic Strain

Correct.

Go to advanced search