Are you sure you specified the step and increment numbers correctly and that nodal temperature data is available for those increments ? If you omit those numbers, Abaqus will begin reading the data from the first increment of the first step in the referenced odb. Does it work in such a case ?
Did you check the documentation (chapter "Smoothed Particle Hydrodynamics", paragraph "Artificial Viscosity") carefully ? Artificial viscosity is, as the name suggests, not meant to model real viscosity. It serves a similar role as *BULK VISCOSITY in Abaqus/Explicit and it’s definition is also...
Segmentation fault usually means a bug in Abaqus or an issue with the computer (the latter might be the case here if the same Abaqus version was used).
This would normally cause a different message but it's often the case that analysis fails because of insufficient disk space for scratch data.
You can't have such overlap between the parts unless you use the embedded region constraint. Otherwise, you would have to make cutouts in soft tissue for bones. If you want to account for the presence of soft tissue at this level but on the side of the bones, 2D model won't be appropriate. It's...
Indeed, crack propagation direction can be calculated only for homogeneous isotropic elastic materials. Details and references can be found in the Theory guide in Abaqus documentation (chapter Prediction of the direction of crack propagation). You could try using subroutines to get this result...
Basically, it’s Newton’s third law of motion. With those output variables, you can get the reactions to applied loads which is very important when checking the results.
Did you get any "negative eigenvalue" warnings in the message file ? They would indicate it.
Abaqus checks and prevents some relationships between the specified constants. Stability conditions for anisotropic elasticity are given in the documentation chapter "Linear Elastic Behavior".
You should find tensile/compressive test curves that could be used directly or indirectly as input for some material models. But several research papers also provide constants, at least for individual constituents (this data could be used for homogenization/RVE models).
There are 2 separate (although partially similar) analysis continuation procedures in Abaqus - restart and import. To change from Abaqus/Standard to Abaqus/Explicit or (vice versa) you need the import procedure. Define initial state field to use it and make sure *IMPORT keyword is included in...
You are using very advanced Abaqus features, you should check the documentation first. User elements are not listed as supported for built-in adaptive meshing but of course, you could try running some tests. You would most likely need some custom coded adaptivity.
When it comes to material properties, usually sufficient physical tests are needed but you can try using the data from literature. There are also ways to calibrate material models for FEM but they typically use test data as reference. Otherwise, you would have to rely on generic properties from...
