* Fix deprecation warnings from tests
* Refactor tests so that ´@testset` is usually called in master file
`runtests.jl`, not inside test file. Later on we can convert tests
to examples.
* Syntax of tests now follow more closely syntax used currently in
JuliaFEM. We have had earlier studies with different kind of syntaxes,
now we have kind of explicit way to do things.
Source code related to read and parse ABAQUS .inp files is now living in
it's own repository `AbaqusReader.jl` and in this commit we cleanup the
same files from this repository.
- add AbaqusReader to .travis.yml because it's not registered package yet
- initialize Mesh from AbaqusReader.jl dict
- remove ABAQUS tests and files moved to AbaqusReader.jl
- remove references to old module Abaqus
- move ABAQUS code to preprocess.jl (what is left)
- close issue #122
- close issue #55
* new mortar segmentation tests which are failing
* test_problems_mortar_3d.jl: first test (Tet4) pass
* solvers.jl: diagonal of A is now properly filled, if that option is used. Another option is to remove zero rows from matrix system, which is on by default
* problems_mortar.jl: added new function diagnose_interface to calculate quantities from interface hopefully revealing bugs in calculation
* problems_mortar_3d.jl: added docstring for check_orientation! and removed flooding debug messages not helping to debug anything
* solvers.jl: Another way to solve Ax = b
* Refactored code to make implementation of Tri6 assemble! easier
* Patch test with linear Tet4 elements and quadratic Tet10 elements pass
When using quadratic elements, in polygon clipping algorithm element is divided to linear sub-elements as proposed in [Puso2008]. Interpolation of Lagrange multiplier space is done using quadratic shape functions.
References
----------
[Puso2008] Puso, Michael A., T. A. Laursen, and Jerome Solberg. "A segment-to-segment mortar contact method for quadratic elements and large deformations." Computer Methods in Applied Mechanics and Engineering 197.6 (2008): 555-566.
* increased coverage by adding diagnose_interface
* test using dual basis, failing for unknown reason
* Fixed dual basis construction for Mortar/Tet4
The coefficient matrix Ae for one particular slave element e is the result performing numerical integration on *all* integration cells associated with this element [Popp2013]. Ae cannot be calculated "cell-wise" like it was done before. Now patch test will pass also using `interface.properties.dual_basis = true` option. Partially integrated slave elements are supported as well.
References
----------
[Popp2013] Popp, Alexander, et al. "Improved robustness and consistency of 3D contact algorithms based on a dual mortar approach." Computer Methods in Applied Mechanics and Engineering 264 (2013): 67-80.
* Minor modifications to preprocess.jl
- removed two functions which are unimplemented (but maybe planned in future)
- added function create_node_set_from_element_set!, which can be used, like name suggests, to create a node set from nodes belonging to some set of elements.
* solvers.jl: now prints a list of overconstrained nodes which can be easily copy-pasted to problem.assembly.removed_dofs list to solver overconstrained situation manually
* Increase code coverage
Added a new test which tests dual basis 3d mortar + adjust option when using Tet4 in elasticity problem.
* Tet10 + Dual basis still failing, others are working
* mortar 3d low level tests
* linear surface element projection tests pass
* Introduced basis transform constant alpha
Tet10 + dual basis patch test still failing, but single element low level routine tests gives expected results with alpha=0.2
* added new integration rule FPG12 for triangular elements
* added drop_tolerance option to remove very small values from constraint matrices
* Introduced a basis transform matrix T
Constructing bi-orthogonal basis for quadratic surfaces is ill-conditioned. By doing a basis transform N' = N*T for slave side displacement vector it's possible to construct a bi-orthogonal basis in a same way than with linear elements. Setting alpha=0.2 ensures that quadratic basis functions are strictly positive in practical cases.
* fix 3d clipping test routine, accepts only 3d vertices
* dropped number of integration poitns from 12 to 7 in quadratic mortar surfaces intrestingly gives more accurate results, maybe something numerical error in FPG12 integration rule..?
* added two displacement patch tests + output writing for all cases
* %s/Int64/Int/g
* Changed test data location
* Fine tuning of logging levels
Jukka Aho