March 2013

February 2011

March 2010

New! DARWIN 7.0 production version is now available. Click here to see complete list of enhancements and new features:

• Automatic Generation of Optimum Fracture Mechanics Models
• New Stress Intensity Factor Solution for Through-Edge Crack in a Variable Thickness Plate
• Enhanced Stress Intensity Factor Solutions for Embedded Crack in Plate
• Bivariant Shakedown Module
• Kt for Turned Surfaces
• Surface Area of Blade Slots
• User Specification of Manufacturing Process Credits
• FAA Hole Feature Surface Damage Report Form
• ABAQUS Translator in FE2NEU
• Named Components in FE2NEU
• New Configuration for Display of GUI Warning Messages
• General Enhancements:
• Crack Growth Life Interpolation
• Treatment of Large Results Files
• Stress Gradient Search Enhancement

July 2008

December 2006

New! DARWIN 6.0 production version is now available. Click here to see complete list of enhancements and new features including:

• New Analysis Mode for Titanium Hard Alpha Anomalies
• Probabilistic Treatment of Multiple AnomaliesCrack Formation Module
• 3-Dimensional Anomaly Modeling
• Production Inspection Capability
• Bivariant Stress Intensity Factor Solution for Corner Crack at Hole (CC10)
• Comprehensive Verification Checks
• Encryption Capability
• GUI Enhancements Including
  • Extract Fracture Mechanics Plate Dimensions Directly From FEM
  • Crack Animation Enhancement
  • Report Generation Enhancement
  • General GUI Enhancements
    

New! DARWIN 5.2 production version is now available. Click here to see complete list of enhancements and new features including:

• New bivariant stress intensity factor solution for corner crack in plate (CC09)
• New bivariant stress 3D visualization capability
• Improved shop visit model
• Enhanced keyword support for DARWIN library files
  

December 2004

DARWIN 5.1 production version is now available. Click here to see complete list of enhancements and new features including:

• New stress intensity factor solutions
• 3D surface damage analysis enhancements
• General risk assessment code enhancements
  • Unlimited number of load blocks
  • Material file improvements
• Parallel processing capability
• GUI batch processing
• ANS2NEU enhancements
  • Capability to execute ANS2NEU directly from GUI
  • Finite element filtering
    

May 2004

DARWIN 5.0 production version is now available. Click here to see complete list of enhancements and new features including:

• Support for Mission Mixing
  • Capability to define missions. The User has full control over order in which missions are analyzed in the Mission Mix
  • Capability to define stress and temperature multipliers for application to a baseline load step
• Initial 3D Capabilities for Surface Damage Mode
  • Capability to import and extract stresses from 3D finite element models
• Redesigned and Expanded Surface Damage Mode
  • Additional K-solutions for off-set surface and corner cracks at holes: SC15, SC18, and CC08,
  • Improved surface crack in plate solution (SC02)
  • Enhanced parallelism between Surface Damage and Inherent analysis modes
    • Support for multiple stress profiles in Surface Damage analysis mode
    • For 1D Surface Damage analysis, the User now provides actual stress profile values instead of gradient values (similar to Inherent analysis mode)
    • The user interface is very similar for all analysis mode
• New DARWIN configuration file
• Electronic Help System enhancements

November 2003

DARWIN 4.2 production version is now available. Click here to see a complete list of enhancements including:

• DARWIN Analysis Code for Windows and Linux platforms
• DARWIN Analysis Code can be executed directly from the GUI
• Speed improvements in the stress processing capability
• Enhanced capability to fit stress gradients with polynomials
• GUI file management

December 2002

• A brief report related to TRMD Phase II activities is now available. To view it, go to the Publications page.

October 2002

• The DARWIN Tutorial has been updated to include new surface damage features associated with the 4.0 release.

August 2002

• DARWIN version 4.0 release. See list of new DARWIN 4.0 enhancements.

March 2002

• DARWIN version 3.5 release. See list of new DARWIN 3.5 enhancements.

April 2001

• DARWIN version 3.4 release. See list of new DARWIN 3.4 enhancements.

March 2001

• The TRMD Phase 1 Report is now available online.

February 2001

• New! View a video describing the main features of DARWIN.
• See the new verification example problem.

December 2000

• DARWIN 3.4 (beta version) released to Steering Committee for review.

November 2000

• Download Demo - A demo version of DARWIN is now available on this web site. To obtain a demo copy, follow the instructions on the Download Demo link.
• Tutorial Session - a beta version of the DARWIN interactive tutorial session is now available for review.

July 2000

• R&D 100 Award - DARWIN was selected as one of the 100 most technologically significant new products and processes of the year by R&D Magazine. For further details, visit the R&D Magazine Website.
  
• Steering Committee Members Page - provides a new section for DARWIN Steering Committee related activities and documents (password protected).
  

November 1999
DARWIN Version 3.3 Release. The following enhancements have been made:

• Graphical User Interface (GUI) enhancements:
  
  • GUI can read uif/uof files with nonaxisymmetric elements.
    
  • *.dat file can now be used to store GUI input
    
  • *.out file now populates the input data screens so both input and output data are available during a GUI session.
    
  • GUI automatically places the crack in the highest stressed location of the zone (note - crack location can be edited by the user).
    
  • Modified color palette for setting zone colors.
    
• Risk Assessment Code Enhancements:
  
  • Implemented Walker interpolation stress ratio format for several fatigue crack growth methods.
    
  • Keyword GUI_VERSION used to ensure compatibility between GUI and risk assessment code.
    
  • Added an "expiration" key.
    
• Users Guide:
  
  • Online Users Guide added to DARWIN Web Site.
    
  • Chapters 3, 5, 6, and 7 and Appendix H have been updated to reflect the new changes.
    
• Web Site Enhancements:
  
  • Download Software - users can now download DARWIN3.3 directly from this site.
    
  • Technical Support - users can contact us via the new DARWIN Hotline, or submit technical support questions using an online form.
    
  • Bug Reports/FAQ - review the current Bug Report/ FAQ lists, or submit new bugs/questions using online forms.
    

July 1999
DARWIN Version 3.2 Release. The following enhancements have been made:

• Importance Sampling Method - accuracy and computation speed improvements.
  
• Graphical User Interface - post processing capabilities.
  
• Output file - additional fatigue crack growth and stress strain property information
  
• Code Verification - expanded validation test matrix includes several new computer platforms
  
• User Manual - new deterministic analysis results and fatigue crack graphs.
  
  In addition, several new enhancements have been added to DARWIN based on comments and suggestions from current users.