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DARWIN Release Notes

DARWIN 10.0 – September 2022

New Features and Enhancements for FAA Certification Assessments

  • Axial Blade Slots 
  • Updated Titanium Hard Alpha Anomaly Distributions 
  • Security Features for Anomaly Distribution and POD Data 

New General Features

  • 3D GUI Visualization Enhancements 
  • SIF Solution for Semi-Elliptical Surface Crack on Hollow Cylinder 
  • Constraint-Loss Surface Fatigue Crack Correction Model 
  • Python-Based Scripting Tool 

Changes in GUI Menus and FE Models Supported in DARWIN

  • New GUI Menus to Support Objectives-Based Data Structure 
  • FE2NEU Finite Element Model Quality Checks (MQCs)  

Speed and Robustness Improvements

  • Autoplate Node-Skipping Enhancement 
  • Autoplate Speed Enhancement for Large 3D FE Models 
  • Automodeling Speed Enhancements 
  • Speed Enhancements for User-Defined Cracks  
  • DARWIN Results File Import Speed Enhancements 
  • GUI Speed Enhancement for Large 3D FE Models  
  • Formation Module Programming Guidelines for Improved Execution Speed 

General Enhancements

  • Updated Limits for Stress Intensity Factor Solutions 
  • Deterministic Analysis Enhancement 
  • User-Defined Project Rules 
  • Setting GUI Preferences via an External File 
  • User’s Guide Keyword Search Enhancement 

DARWIN 9.2 – June 2019

  • 2D/3D Surface Autozoning
  • Dhondt Fatigue Crack Growth Model
  • El Haddad Small Crack Model
  • Life/Risk Contour Fracture Plates Visualization
  • Location-Specific POD Curves
  • Restart Using Intermediate Fracture Plates
  • Autoplate Speed/Robustness Improvements
  • GUI Node Selection Speed Improvement
  • 3D GUI Visualization Enhancements
  • Hot Corrosion Enhancements
  • Shakedown Enhancement for 1D Geometry Mode
  • Mission Scaling Enhancements
  • Crack Size Termination Criterion Enhancement
  • Bivariant Plate Enhancement
  • Fleet Risk Module Enhancement
  • 3D Anomalies Enhancements
  • Production Inspections on Non-Hoop Planes
  • Direct Import of ANSYS and ABAQUS Load Step Times
  • GUI File Access Speed Enhancement
  • New Treatment of Material Properties Interpolation

DARWIN 9.1 – August 2017

  • Zoneless Deterministic Analysis
  • Autoplate for 3D Finite Element Models
  • Improved Support for Large Finite Element Models
  • Enhanced Monte Carlo Sampling by a Response Surface

DARWIN 9.0 – May 2016

  • Optimal Autozoning with Gaussian Process Pre-Zones
  • Support for 3D Sector Models
  • Stress Intensity Factor Solution for Angled Corner Cracks (CC18)
  • Formation Life Scaling by Microstructure
  • Anomaly Distribution Tracking
  • Micromechanical Model for Crack Initiation
  • Enhancements for Large Finite Element Models

DARWIN 8.2 – November 2015

  • 3D Inherent Analysis using Autozoning
  • Support for Shop Visit Anomalies
  • New Mission Mixing Interface
  • Support for FRANC3D Stress Intensity Factor Solutions
  • Stress Intensity Factor Solution for Crack at Chamfered Corner (CC12)
  • Material Property Scaling by Microstructure via External User Module
  • Random Average Grain Size
  • Random Anomaly Orientation
  • Corrective Actions via Fleet Assessment Module
  • Importance Sampling via Gaussian Processes
  • High Cycle Fatigue Stresses from 3D Finite Element Model
  • Input 3D Residual Stresses from Finite element Models
  • Material Properties File Link

DARWIN 8.1 – March 2015

  • Autozoning with Inspection
  • Random Residual Stresses in 2D Finite Element Model
  • Anomaly Orientation
  • Hot Corrosion Pit Anomalies
  • 3D Residual Stress from Univariant Stress Gradients
  • 3D Surface & 3D Line Zoning
  • Updated SIF Solutions for Surface Cracks (SC30 & SC31)
  • Component Replacement for Fleet Assessments

DARWIN 8.0 – January 2014

  • Optimal Autozoning for Axisymmetric Geometries
  • Crack Growth Retardation Capability
  • Bivariant Surface Crack at Off-Center Hole Feature (SC29)
  • Residual Stresses for All Univariant Crack Types
  • Additional Temperature Option for Thermo-Mechanical Fatigue
  • Support for Cracks on Non-Hoop Stress Planes
  • User Crack Propagation Module
  • HDF5 File Format to Store DARWIN Input and Output

DARWIN 7.2 – March 2013

  • Automatic Zone Generation for Axisymmetric Geometries
  • Time-Dependent Fatigue Crack Growth Analysis
  • Parallel Processing using OpenMP Framework
  • Residual Stress Profiles for Surface Cracks
  • FE2NEU Support for ABAQUS Models with Non-Cartesian Coordinate Systems
  • Mission Definition Enhancements

DARWIN 7.1 – February 2011

  • Deterministic Analysis Mode
  • FAA Analysis Mode for Surface Damage at Hole Feature (AC 33.70-2)
  • Automatic Generation of Crack Growth Life Contours
  • Treatment of Non-Normal Bivariant Corner Cracks
  • High-Cycle Fatigue Threshold Check
  • User-Supplied Stress Intensity Factor Tables
  • Support for Thermo-Mechanical Fatigue Crack Growth
  • Stress Level Sensitivity Stress Ratio Model for NASGRO FCG Format
  • Treatment of Material Processing-Related Residual Stresses
  • Additional Deterministic Fracture Mechanics Output
  • Risk Assessment for Multiple Types of Anomalies
  • Compute Life for a Specified Probability of Fracture
  • Specify Crack Location by Node ID
  • Fleet Assessment Module

DARWIN 7.0 – March 2010

  • Automatic Generation of Optimum Fracture Mechanics Plates - Autoplate
  • New Stress Intensity Factor Solution for Through-Edge Crack in a Variable Thickness Plate (TC15)
  • Enhanced Stress Intensity Factor Solutions for Embedded Crack in Plate (EC04, EC05)
  • Bivariant Shakedown Module
  • Kt-Regions for Turned Surfaces
  • Tool to Compute Surface Area of Blade Slots
  • User Specification of Manufacturing Process Credits
  • FAA Hole Feature Surface Damage Report Form
  • ABAQUS Translator in FE2NEU
  • New Configuration for Display of GUI Warning Messages
  • Crack Growth Life Interpolation
  • Treatment of Large Results Files

DARWIN 6.1 – July 2008

  • Stress Concentration Factors for General Inherent Analysis Mode
  • New 2D Surface Damage Analysis Mode (Support for Turned Surfaces)
  • New Crack Types and Revision of Existing Crack Types
  • New Fatigue Crack Growth Models (NASGRO® and Multilinear Equations)
  • Mission Scaling Factor Enhancements
  • Multiple Load Steps for 3D Surface Damage Analysis Mode
  • New Finite Element Results Translator – FE2NEU

DARWIN 6.0 – December 2006

  • New FAA Analysis Mode for Titanium Hard Alpha Anomalies (AC 33.14-1)
  • Probabilistic Treatment of Multiple Anomalies
  • User Module for Crack Formation
  • 3D Anomaly Modeling
  • Production Inspection Capability
  • Bivariant Stress Intensity Factor Solution for Corner Crack at Hole (CC10)
  • Comprehensive Verification Checks
  • Encryption Capability
  • Crack Animation Enhancement
  • Report Generation Enhancement

DARWIN 5.2 – July 2005

  • 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

DARWIN 5.1 – December 2004

  • Updated Stress Intensity Factor Solutions (SC17, SC18, and CC08)
  • 3D Surface Damage Analysis Enhancements
  • Unlimited Number of Load Blocks
  • Material File Improvements
  • Parallel Processing using MPI Framework
  • GUI Batch Processing
  • Capability to Execute ANS2NEU from GUI
  • Finite Element Filtering

DARWIN 5.0 – May 2004

  • Support for Mission Mixing
  • Initial 3D Capabilities for Surface Damage Mode
  • Capability to Import and Extract Stresses from 3D Finite Element Models
  • Redesigned and Expanded Surface Damage Mode
  • New DARWIN configuration file

DARWIN 4.2 – November 2003

  • DARWIN Analysis Code for Windows and Linux platforms
  • Direct Execution of DARWIN Analysis Code from GUI
  • Enhanced Capability to Fit Stress Gradients with Polynomials

DARWIN 4.1 – November 2002

  • Simultaneous Editing of Zone Properties
  • Automated Report Generation
  • Deterministic Crack Growth

DARWIN 4.0 – August 2002

  • Surface Damage Analysis Mode
  • New Stress Intensity Factor Solutions
  • Polynomial and Weight Function Methods

DARWIN 3.5 – March 2002

  • Restart Capability
  • Element Subdivision
  • Onion Skinning

DARWIN 3.4 – December 2000

  • Upgraded Stress Intensity Factor Solutions
  • Inspection Transition
  • Rainflow and Shakedown
  • Confidence Bounds

DARWIN 3.3 – November 1999 

  • GUI Support For Finite Element Models with Non-Axisymmetric Elements
  • Automatic Placement of Crack in Maximum Stress Location
  • Implemented Walker Interpolation for Several Fatigue Crack Growth Methods.

DARWIN 3.2 – July 1999 

  • Importance Sampling Method - Accuracy and Computation Speed Improvements.
  • Post-Processing Capabilities in GUI