James Ratcliffe

Mail Stop 188E, NASA Langley Research Center, Hampton, VA 23681
Tel: (757)-864-9313

Fax: (757)-864-8911
Email: james.g.ratcliffe@nasa.gov

Research Interests

·         Damage resistance and tolerance of composite sandwich structure

·         Damage resistance and tolerance of monolithic fiber-reinforced polymeric composite laminates

Current Research

·         Determination of mode III delamination resistance of fiber-reinforced polymeric composite laminates

·         Investigation of damage tolerance of composite subcomponents via testing and accompanying analysis.

·         Development of a standardized test method for characterizing facesheet/core debonding in sandwich panels.

·         Investigation of delamination branching in monolithic fiber-reinforced polymeric laminates.

Publications

·         Ransom, J.B., Glaessgen, E.H. and Ratcliffe, J.G., “An Overview of Innovative Strategies for Fracture Mechanics at NASA Langley Research Center,” Proceedings of the 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA-2010-2560-CP, AIAA, Orlando, FL, April 12-15, 2010.

·         Ratcliffe, J., “Sizing Single Cantilever Beam Specimens for Characterizing Facesheet/Core Peel Debonding in Sandwich Structure,” NASA Technical Publication, NASA/TP-2010-216169, 2010.

·         Browning, G., Carlsson, L.A., and Ratcliffe, J. “Redesign of the ECT Test for Mode III Delamination Testing. Part I: Finite Element Analysis,” Journal of Composite Materials, published online January 5, 2010.

·         Ratcliffe, J., and Jackson, W.C., “A Finite Element Analysis for Predicting the Residual Compressive Strength of Impact-Damaged Sandwich Panels,” National Technical Specialists Meeting on Rotorcraft Structures and Survivability, the AHS Southeast Region, Hampton Roads Chapter, Radisson Fort Magruder Inn and Conference Center, Williamsburg, Virginia, October, 2009

·         Krueger, R., Ratcliffe, J.G., and Minguet, P.J., “Panel Stiffener Debonding Analysis Using a Shell/3D Modeling Technique,” Composites Science and Technology, Vol. 69, 2009, pp. 2352-2362.

·         Ratcliffe, J., and Jackson, W.C., “A Finite Element Analysis for Predicting the Residual Compressive Strength of Impact-Damaged Sandwich Panels,” NASA Technical Memorandum, NASA/TM-2008-215341, 2008.

·         Ratcliffe, J., and Jackson, W.C., “Compressive Strength Prediction of Impact-Damaged Composite Sandwich Panels,” Proceedings of the 23st ASC/ASTM Annual Technical Conference, Memphis, TN, September 9-11, 2008.

·         Krueger, R., Ratcliffe, J.G., and Minguet, P.J., “Analysis of Composite Panel-Stiffener Debonding Using a Shell/3D Modeling Technique,” Proceedings of the 16th International Conference on Composite Materials, Kyoto Japan, July 8-13, 2007.

·         Krueger, R., Ratcliffe, J.G., and Minguet, P.J., “Analysis of Composite Panel-Stiffener Debonding Using a Shell/3D Modeling Technique,” National Aeronautics and Space Administration Report, NASA/CR-2007-214879, National Institute of Aerospace Report # 2007-07.