Change log
==========

**VERSION 1.4**

- 1.4.3 (2022/01/11)

  - Fixed the issue of plotting element stress and strain results.
  - Fixed the issue of plotting dehomogenization results with quadratic elements.
  - Added groups for different stress and strain plots.
  - Added alternative tag names for material strength properties.
  - Added visualization for initial failure analysis results.
  - Added a new example for initial failure analysis (ex\_uh60a\_f).
  - Simplifed and unified material strength inputs for different types of materials.
  - Updated the section of material strength property input in the documentation.

- 1.4.2 (2021/11/05)

  - Fixed an issue related with layer generation.

- 1.4.1 (2021/09/01)

  - Fixed an issue in assigning theta1 and theta3 for filling components.

- 1.4.0 (2021/06/16)

  - Added a new command option to run integrated VABS.
  - Added new inputs for the rotor blade specific parameterization.
  - Added new inputs for strength property of 'lamina' type materials.
  - Added new inputs for assigning orientations for filling materials.
  - Added a new input option for recover analysis in VABS. The default is linear beam theory.
  - Added a new input option for setting the tolerance used in geometric computation.
  - Added the capability of failure analysis using VABS.
  - Updated the logging system.
  - Changed the default element type to 'quadratic'.
  - Unified the input syntax of recovery/dehomogenization of VABS/SwfitComp.
  - Fixed the issue of incorrectly parsing numbers with more than one spaces between numbers.
  - Fixed an issue in transforming an arc defined by center, start and radius.

**VERSION 1.3**

* 1.3.0 (2021/02/25)

  * Added a new capability to create base points using normalized parametric locations on a base line.
  * Added a new capability to assign local mesh size for filling components.


**VERSION 1.2**

* 1.2.0 (2020/11/10)

  * Added a new capability to create layups from sublayups.
  * Added a new capability to create segments using normalized parametric locations on a base line.


**VERSION 1.1**

* 1.1.1 (2020/10/28)

  * Fixed the problem of unable to read recover analysis result files on Linux.
  * Fixed a problem when the segment is too short while the laminate is too thick.

* 1.1.0 (2020/10/15)

  * Added a new format for the input file. Now baselines and layups data are merged into the main input file, to reduce the number of input files needed.
  * Added a new material type 'lamina' accepting four numbers for elastic properties.
  * Added default small numbers for elastic properties for isotropic materials.
  * Updated the fill-type component for non-structural mass.


**VERSION 1.0** (2019/07/01)

* Added capability to create quadratic triangle elements. In the main input file, under the xml element `<general>`, create a sub element `<element_type>` and set it to `quadratic` or `2`. Default is `linear`.
* Added a new output file `*.txt` storing all running messages.
* Changed one of the layup methods tag name from 'explict list' ('el') to 'layer list' ('ll').
* Fixed the crashing issue caused by zero number of layers.
* Fixed the bug that sectional loads were read and written to the distributed loads when doing recovery using VABS.
* Fixed the bug that local lamina data does not overwrite global data.


**VERSION 0.6** (2018/07/01)

* Added xml elements in the main input file for various options of VABS/SwiftComp execution.
* Added xml elements in the main input file for failure analysis of SwiftComp.
* Added a `<basepoints>` element in the baseline file. Now for simple shapes, users do not need to use an extra basepoint file, which can still be included for long point list.
* Added a material database file along with the executable. Now PreVABS will look for materials in this file by default.
* Changed Gmsh library to dynamic/shared library.


**VERSION 0.5** (2018/01/31)

* Added the capability to create nose mass in an airfoil type cross section.
* Added the post-processing function to visualize the recovered strains and stresses in Gmsh.


**VERSION 0.4** (2017/12/04)

* Added the capability to read stacking sequence code.
* Added the parameter to set the number of straight lines to approximate an arc or circle.
* Changed the Gmsh input file name to `*.msh`, where `*` is the cross section name.


**VERSION 0.3** (2017/11/27)

* Updated the manual.
* Changed the default behaviour of the command with input file specified only to preparing VABS input (without running VABS).
* Changed the element tag `<origin>` to `<translate>`. Now the two numbers in this element moves base points and base lines, instead of the origin.
* Changed the element tag `<rotation>` to `<rotate>`.
* Changed the 'level' of a segment from an element to an attribute, with default 1.
* Changed the 'layup_direction' of a segment from an element to an attribute of the layup, with default 'right'.
* Changed the material type 'engineering constants' to 'orthotropic'.
* Set the default element type as 'quadratic'.
* Set the default mesh size to the smallest layer thickness.