Release notes are available for the following releases of CONTACT:
CONTACT Release v16.1
CONTACT Release v15.1
CONTACT Release v14.1
CONTACT Release v13.1
CONTACT Release v12.2
CONTACT Release v12.1
CONTACT Release v11.1
CONTACT Release v10.2
CONTACT Release v10.1
CONTACT Release v9.1
- The main change in the program itself concerns extension and speed-up of the subsurface stress calculation.
- Further the CONTACT library has been improved and is now provided integrated in Universal Mechanism.
- Added a fast solver TangCG for transient sliding and rolling contact [Zhao2015a].
- Providing the computational core of CONTACT as a library, with a MATLAB® interface.
- More complete overview of input-data written to output-file.
- Added option O=1 for reducing the size of the output-file.
- Extensions for solving conformal contact problems, particularly between the wheel flange root and rail gauge corner.
- Further speed-up of the normal contact solver, particularly for situations with prescribed normal force.
- Improvements with respect to presentation of the results.
- Improved capabilities for reproducing measured creep force curves, via a model for the third body layer and velocity dependent friction laws.
- Interesting results with respect to the effects of velocity dependent friction in transient simulations.
- Substantial improvements with respect to the ease of use and documentation of the program.
- Achieved a 100-fold speedup for solving larger normal contact problems.
- Improved the documentation of the viscoelastic part of CONTACT and provided an example of its use.
- Distinguished free and premium features in the software, the latter requiring a valid license file.
- Added a full wheel-rail example: S1002 on UIC60, conform the Manchester benchmark problem.
- Added provisions for investigation of more detailed friction laws, such as velocity dependent friction.
- Made several performance improvements. In total, many smaller test cases can now be solved in 3 to 30 msec per case.
- Improved the CONTACT GUI such that it works on the Linux platform as well.
- Added an installer for the Windows platform, and a plain graphical user interface, the CONTACT GUI.
- Added detailed control over the undeformed distance of the two bodies, and an example for transient rolling problems.
- Implemented a new iterative solver "SteadyGS" for the steady state rolling problem.
- Resolved a problem in the calculation of problems for bodies with dissimilar materials.
- Added the FASTSIM algorithm for quickly approximating the tangential stresses.
- Speed-up of the computations using parallelisation on multi-core PC's.
- Improved input-options for the subsurface stress calculation, with an example and a plot-routine.
- Allow for comments in and improved handling of the user input file, provide more control over the progress output.
- Improved leading edge boundary condition, avoiding spurious oscillations when larger time steps are used.
- Allow larger problems to be solved, by dynamic memory allocation and matrix-free implementation of the solution algorithms.
- Improved flexibility of the program, by introducing the experiment name; improved error-handling with respect to the user input.
- Improved the internal structure and extendability of the program, a.o. by introducing a (Fortran90) hierarchical data-structure.