### Procedures

- Coriolis forces can be included in steady state dynamics calculations
- a *STATIC calculation in a local rotating system can be followed by a *DYNAMIC calculation in the global (non-rotating) system (parameter RELATIVE TO ABSOLUTE)
- enhanced the parallellization (multi-threading) for *DYNAMIC,EXPLICIT calculations
- mass proportional Rayleigh damping was introduced in *DYNAMIC,EXPLICIT calculations
- implemented mass scaling and contact spring stiffness reduction for *DYNAMIC,EXPLICIT calculations
- improved the speed of CFD-calculations
- introduced mass scaling for steady state CFD-calculations
- *GREEN works now also for cyclic symmetry calculations
- the displacent target function in *SENSITIVITY analyses was changed from the sum of the square of the displacements to the square root of the sum of the square of the displacements

### Loading

- changed the treatment of thermal strains from an additive approach (on the strains) to a multiplicative approach (of the deformation gradients): will slightly change all nonlinear geometrical calculations with temperature loading.
- allowed for the conversion of the mechanical strain in residual strain at the start of a step for selected elements (*MODEL CHANGE,ELEMENT,MECHSTRAINTORESIDUAL)

### Material

- changed the input for a Ciarlet material from Lame's constants to Young's modulus and Poisson's coefficients
- coded umat_lin_el_corot.f: allows calculations for large rotations based on the Biot strain; used in fracture mechanics.

### Elements

- Rotating gas pipe with friction and changing cross section.

### Documentation

- Included the theoretical basics of the CFD-implementation.

### Output

- included reference displacements in the .eig-file
- mass, mass moments of inertia and center of gravity can be stored in the .dat-file (key EMAS on the *EL PRINT card).
- the wave rotation direction in *COMPLEX FREQUENCY and *FREQUENCY calculations with cyclic symmetry is automatically stored in the .dat-file
- contact forces and moments on slave contact surfaces can be stored in the .dat-file (*CONTACT PRINT)
- reduced the screen output for explicit dynamic calculations (improves speed).
- a double precision binary frd-file can be generated using the DOUBLE parameter on a *NODE OUTPUT or similar card.

### CalculiX GraphiX

- Transparency (blending of colors) implemented and available via menu or command line for elemet faces.
- Multi-threading implemented for meshing, mapping and the 'cut' command.
- Improved 2D unstructured meshing (pre-requisite for 3D tet meshing).
- The frd format specification is extended by a double precision binary format.
- Changed or extended commands:
- asgn: The number of cpu threads can be chosen. Default is currently '4' when cgx is started with '-a' and otherwhise '1' since the mesh numbering would be different each time the 'mesh' command is used with more than '1' threads (defined in cgx.h 'NTHREADS'). The user may use this command in his personal '.cgx' config file to define the nr of threads to be used.
- ds: Uses parameter 'f' to finalize the current dataset. This triggers a new calculation of the max/min values of the current dataset.
- hcpy The default name of the hcpy file and the running number of that type of file is written to the stack if requested. Or the user may specify the base name of the hcpy file.
- neigh Extended functionality and faster execution. Writes *EQUATION, *TIE and *CONTACT formulations to be ready for use.
- plot/ The numerical values at nodes are now presented with option 'nn' plus instead of 'nv'. The option 'nv' is now used to present the values at the nodes using colors in the same way as with 'fv' or 'ev'. with 'f' and 'v' for illuminated faces or results (ie. fvb).
- plot/ Transparency can be chosen with parameter 'b' together plus with 'f' and 'v' for illuminated faces or results (ie. fvb).
- qmsh The mesh type can be switched between unstructured and structured with key 'x' (the structured tr6 will be used after pressing 'x' if no elemtype was assigned so far)
- read Reading of double precision binary formated results. Nevertheless the results are stored in single precision data fields.
- read In case a file written in an un-common format should be evaluated the user may read the file into the cgx stack memory. From there it can be parsed in a while loop using 'valu' commands.
- txt User defined texts can be assigned to a single- or set of nodes.
- valu/ Values with a leading '!' in the name are not written to val the fbd file.
- view Add a ruler bar to the graphic with parameter rul and optional the unit.

- New commands:
- col: User defined new colors which can be used with plot/plus. The user may use this command in his personal '.cgx' config file.

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