Use FEMBeam.jl to solve beam problems. Added an example, where
natural frequencies of frequencies of 3d frame structure are
calculated. Some minor modifications to Modal analysis is done to make
Xdmf writing of 6 dof nodes work.
Development of auto-differentiated mortar contact mechanics in 2D is moved to own separate package, MortarContact2DAD. Other changes are similar to what is done with MortarContact2D: elements are added to problems using `add_slave_elements!` and `add_master_elements!` instead of `add_elements!`, to make interface more explicit. Also, problem name is `Contact2DAD`, so the dimension is now explicitly stated in problem name. (Also have `Mortar2DAD`, compare to the `Mortar2D` and `Contact2D` of `MortarContact2D.jl`.)
Moved plane contact related stuff to own separate package
`MortarContact2D.jl`, where the development continues.
The following changes to test files are done:
1) Problem name for plane mortar coupling is `Mortar2D` (was `Mortar`
before), and later on 3d coupling will be `Mortar`. So the dimension
of coupling operator is explicitly given in a problem name.
2) Before elements to coupling was defined using
```julia
update!(problem.elements, "master elements", master_elements)
add_elements!(problem, [slave_elements; master_elements])
```
Now, explicitly give master and slave elements as
```julia
add_slave_elements!(problem, slave_elements)
add_master_elements!(problem, master_elements)
```
Keep on mind that Lagrange multipliers are in slave side.
Heat transfer analysis is moved to its own package where the development continues. Two small modifications are needed for test files:
- Instead of `problem.properties.formulation`, we have two separate problems, `PlaneHeat` for two-dimensional problems and `Heat` for three-dimensional problems.
- Unnecessary prefixing of field names is changed. For example, now we simply have only "thermal conductivity" and not prefixed "temperature thermal conductivity".
A lot of code is moved to FEMBasis.jl regarding
calculating basis / shape functions of finite elements.
* add FEMBasis to REQUIRE
* remove obsolete files
* remove obsolete test files
* make integration point iterable
* loosen type definitions
* get length of element rather from basis than connectivity
* calculate midpoint of reference element
* wrong input argument to eval_basis! fixed
- Added TimerOutputs.jl to REQUIRE file
- JuliaFEM has now TimerOutput handle `to` and function `print_statistics()` to get summary of time and memory usage
- TimerOutputs is used in LinearSolver at the moment and tested in file `test_elasticity_2d_linear_with_surface_load.jl`
Jukka Aho