Recent projects supported by:

US Navy – Office of Naval Research – Structural Reliability Program
US Navy – Naval Air Systems Command
US Air Force Office of Scientific Research – Aerospace Materials for Extreme Environments
NASA LaRC – Durability and Damage Tolerance Programs

Active Research Projects:

Title: Characterizing Fatigue Induced Stiffness Degradation in Simple Welded Aluminum Structures via Direct Experimental Testing
Principal Investigator: Derek Warner
Co-PIs: None
Sponsor: US Navy, Office of Naval Research
Amount: $54,917
Start / End: 6/1/2014 – 1/31/2015Title: Assessing the Utility of Existing Models to Characterize the Mechanical Performance of Additively Manufactured Alloys
in the Navair Service Environment
Principal Investigator: Derek Warner
Co-PIs: None
Sponsor: US Navy, NAVAIR via ISSI
Amount: $50,000
Start / End: 7/1/2014 – 1/31/2015Title: Atomistic Exploration of Impurity Effects on the Intrinsic Brittleness of Silicon Carbide
Principal Investigator: Derek Warner
Co-PIs: None
Sponsor: US Air Force Office of Scientific Research
Amount: $399,691
Start / End: 9/15/2011 – 9/14/2014Title: Improving Crack Growth Prediction at Al Welds in Marine Environments via Quantum Mechanics Based Atomistic Modeling
Principal Investigator: Derek Warner
Co-PIs: None
Sponsor: US Office of Science and Technology Policy (PECASE)
Amount: $1,000,000
Start / End: 1/15/2010-9/30/2015

Past Research

Past research has concentrated on computer simulation and physical testing of complex fracturing processes in materials ranging from rock to aerospace alloys. Experimental results are used as input data for developing a family of powerful systems for simulating crack propagation, based on finite- and boundary-element engines, and employing unique topological data structures and computer-visualization techniques. These systems are being used by the aerospace industry at Boeing, GE, Northrop Grumman, and Pratt and Whitney, by the petroleum industry at Schlumberger, Dowell, and Exxon, and by government agencies such as the FAA and NASA Langley and NASA Glenn Research Centers.

For the aerospace community, our tools are being applied to assess damage tolerance in critical flight structures, especially in aging commercial military and jet aircraft, and in gas turbine components. The principal objectives are to predict the rate of crack propagation due to fatigue in fuselage and engine components, and to estimate their remaining life and residual strength.

For the petroleum industry, we are providing simulators for the process of hydraulic fracturing of oil and gas wells, a process that stimulates increased production. Simulations involve complex geometries of multiple cracks, and coupling with fluid flow and particle transport processes.

We have also used our simulators to perform forensic studies of cracking in large concrete structures. We have been able to identify the causes of cracking and failure of bridge piers and of gravity and arch dams in the U.S. and in Europe.

DARPA Tech 2007 video

 

  • Multiscale Peridynamics Theory for Corrosion Fatigue Damage Prediction,
    Principal Investigator: Nagaraja Iyyer, Technical Data Analysis, Inc.
    Co-PIs: Derek Warner, Sponsor: US Navy, Office of Naval Research,
    Amount: $24,000 (Cornell Portion), Start / End: 7/12/2013 to 10/31/2014
  • Characterizing Stiffness Degradation in High Performance Welded Aluminum Structures,
    Principal Investigator: Derek Warner, Sponsor: US Navy, Office of Naval Research,
    Amount: $152,000, Start / End: 1/15/2012 – 1/14/2014
  • Characterizing the Fracture Properties of Planar Defects in Aluminum,
    Principal Investigator: Derek Warner, Sponsor: NASA
    Amount: $361,844, Start / End: 10/1/2008-9/30/2012
  • An Atomistically Informed and Experimentally Calibrated Ductile Fracture Model of Aluminum for Hull Structural Analysis,
    Principal Investigator: Derek Warner, Sponsor: US Navy, Office of Naval Research
    Amount: $277,173, Start / End: 6/1/2008-9/30/2011
  • Title: Incorporating Materials Aging and Degradation into the Analysis of Ship Structures
    Principal Investigator: Wilkins Aquino, Co-PI: Derek Warner, Sponsor: US Navy, Office of Naval Research
    Amount: $52,794 (Spent by PI), Start / End: 2/29/2008-4/30/2009
  • Title: Using Concurrent Multi-Scale Simulations to Guide the Exploration of Severe Plastic Deformation in Tungsten
    Principal Investigator: Derek Warner, Sponsor: US Army Research Laboratory
    Amount: $49,875.00 (not through sponsored programs), Start / End: 7/9/2008-1/31/2010
  • Constellation University Institute Project: The Institute for Future Space Transport
    Sponsor: NASA Marshall RC; Period: 10/2007 – 9/2012
  • Prognosis of Long-Term Load-Bearing Capability in Aerospace Structures: Quantification of Microstructurally Short Crack Growth
    Sponsor: Air Force Office of Scientific Research; Period: 5/2010 – 5/2013
  • A 3D Experimental and Numerical Study of Microstructurally-small Fatigue Crack Growth in an Aluminum Alloy
    Sponsor: National Science Foundation; Period: 9/2010 – 8/2013
  • Multi-scale Simulation of Fatigue Damage
    Sponsor: Northrop Grumman Corporation; Period: 1/2007 – 12/2011
  • Multi-Scale Simulation of Cracking Processes in Metallic Materials
    Sponsor: NASA; Period: 1/2007 – 12/2008
  • Geometrical Simulation of Complete Process of Microstructurally Small Fatigue Cracking
    Sponsor: DARPA; Period: 1/2009 – 12/2009
  • Computational Methods in Physics-Based Modeling of Damaged Flight Structures
    Sponsor: NASA LaRC; Period: 1/2008 – 12/2010
  • Multi-scale Simulation of Fatigue Damage Sponsor: Northrop Grumman Corporation; Period: 1/2007 – 12/2011
  • Structural Integrity Prognosis System (SIPS) (Creating models for multi-scale simulations)
    Sponsor: DARPA/Northrop Grumman; Period: 10/2003 – 5/2008
  • Computational Micro-Mechanical Investigations of Crack Initiation in Metallic Polycrystals
    Sponsor: NASA Langley – ACMB; Period: 10/2002 – 9/2005
  • An Advanced Interactive Discovery Environment for Engineering Education
    Sponsor: NASA, New York State, AT&T; Period: 2/2001 – 12/2008
  • ASP: Adaptive Software for Field-driven Simulations
    Sponsor: NSF/ITR; Period: 9/2000 – 8/2005
  • Finite Element/Fracture Mechanics Simulation of Trajectories During Transverse Fracturing of Plastic Films
    Sponsor: Eastman Kodak; Period: 12/1999 – 12/2002
  • A Two-Tier Computation and Visualization Facility for Multiscale Problems
    Sponsor: NSF/CISE RI; Period: 1/1999 – 9/2004
  • Probabilistic Simulation of Fatigue Crack Initiation
    Sponsor: AFOSR; Period: 4/1998 – 10/2001
  • Crack Propagation on Teraflop Computers
    Sponsor: NSF; Period: 3/1998 – 8/2001
  • Crack Turning/Arrest Behavior of Integral Structure
    Sponsor: NASA Langley Research Center; Period: 1/1998 – 9/1999
  • Simulation of Crack Growth in Spiral Bevel Gears
    Sponsor: NASA Lewis Research Center; Period: 12/1996 – 11/2002
  • Three-Dimensional Crack Initiation and Propagation in Transparent Rock-Like Material Subject to Compression
    Sponsor: NSF; Period: 9/1996 – 4/2000
  • Simulation of Damage Tolerance in Honeycomb Core Structure
    Sponsor: Boeing Commercial Airplane Co.; Period: 5/1996 – 12/1998
  • Measurement of Fracture Toughness of Concrete Using the Short-Rod Procedure
    Sponsor: NSF; Period: 9/1995 – 5/1999
  • Finite Element Stress Analysis Subroutines for RAPID
    Sponsor: FAA; Period: 9/1990 – 4/2000
  • Crack Growth Prediction Methodology for Multi-Site Damage
    Sponsor: NASA Langley Research Center; Period: 9/1990 – 9/1998
  • Three-Dimensional Simulation of Propagation of Arbitrarily-Shaped Crack
    Sponsor: Northrop Grumman Corporation; Period: 1/1985 – 12/2001
  • Hydraulic Fracture Propagation
    Sponsor: Schlumberger; Period:
  • Development of Virtual Crack Extension Method for Calculation of Rate of Energy Release Rate
    Sponsor: Northrop Grumman Corporation; Period:

 

The CFG was formed in the early to mid 1990’s. Research projects prior to that have not been listed here.