Verification of Closed Form Mixed Mode Strain Energy Release Rate Expressions for Unidirectional Laminate Configurations
Enjuto, P., Lobo, M., and Mabson, G.E.
2019 AIAA SciTech Forum, AIAA 2019-1042, 7-11 January 2019, San Diego, California.
Publications
NSE Composites engineers are primary or contributing authors on the following journal articles, publications, and presentations:
Investigation of Stiffening Effects on Notch Growth Trajectory of Composite Stiffened Panels with Large Transverse Notches
Enjuto, P., Lobo, M., Walker, T.H., Peña, G., Cregger, S.E., and Wanthal, S.P.
2019 AIAA SciTech Forum, AIAA 2019-0515, 7-11 January 2019, San Diego, California.
A Conceptual Framework for Practical Progressive Damage Analysis of Stiffened Composite Aircraft Structure with Large Notches Subjected to Combined Loading
Walker, T.H.
Presented at the 63rd Composite Materials Handbook-17 (CMH-17) Meeting, 17 March 2015, Salt Lake City, Utah.
Application of Aerospace Durability and Damage Tolerance Approaches to Wind Blade Design
Graesser, D.L., and Hoyt, D.M.
2018 Sandia Blade Workshop, August 28-29, 2018, Lubbock, Texas.
Closed-Form Mixed-Mode Strain Energy Release Rate Expressions for Unidirectional Laminate Configurations
Enjuto, P., and Mabson, G.E.
American Society for Composites (ASC) 33rd Annual Technical Conference, Seattle, WA, 24 – 26 September 2018.
Closed-Form Fracture Analysis Based on First Order Shear Deformable Plate Theory
Enjuto, P., Graesser, D.L., Mabson, G.E., and Weckner, O.
2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech Forum, (AIAA 2018-2248), 8 – 12 January 2018, Kissimmee, Florida.
Investigation of Stiffening and Curvature Effects on the Residual Strength of Composite Stiffened Panels with Large Transverse Notches
Enjuto, P., Walker, T.H., Lobo, M., Cregger, S.E., and Wanthal, S.P.
2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech Forum, (AIAA 2018-2251), 8 – 12 January 2018, Kissimmee, Florida.
Energy-Based Stiffness Degradation for Alleviation of Mesh Sensitivity for Progressive Failure Analysis of Center-Notched Composite Panels
Minguet, P.J., Karayev, K.Z., Balabanov, V., Lee, S., Muraliraj, N., Walker, T.H., Nelson, E.E., Robbins, D.
AIAA 2012-1620, 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, 23 – 26 Apr 2012.
Residual Strength Evaluation of Typical Aircraft Composite Structures with a Large Notch
Karayev, K.Z., Minguet, P.J., Lee, S., Balabanov, V., Muraliraj, N., Walker, T.H., Nelson, E.E.
Robbins, D., AIAA 2012-1862, 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, 23 – 26 Apr 2012.
Fracture Interface Elements For Static And Fatigue Analysis
Mabson, G.E., Deobald, L.R., Dopker, B., Hoyt, D.M., Baylor, J.S., Graesser, D.L.
16th International Conference On Composite Materials (ICCM 16), 2007.
Interlaminar Fatigue Elements for Crack Growth Based On Virtual Crack Closure Technique
Deobald, L.R., Mabson, G.E., Dopker, B., Hoyt, D.M., Baylor, J.S., Graesser, D.L.
AIAA/ASME/ASCE/AHS Structures, Structural Dynamics, and Materials Conference, 2007.
Damage Tolerance of Composites Sandwich Airframe Structures—Additional Results
Tomblin, J.S., Raju, K.S., Walker, T.H., Acosta, J.F.
DOT/FAA/AR-05/33, 2005.
Composite Bonded Joints Analysis, Data, and Substantiation – Industry Directions and Technical Issues
Hoyt, D.M., Ward S.H.
FAA Composite Bonded Joints Workshop Seattle, WA , June 16-18, 2004.
Boeing CAI: Interlaminar Fatigue Analysis – Interlaminar Fatigue Analysis Based on CAI Interface Element
Hoyt, D.M., Walker, T.H., Graesser, D.L., Mabson, G.E., Deobald, L.R., and Dopker, B.
FAA/ASTM Workshop on Computational Fracture Mechanics for Composites, Salt Lake City, UT March 22-23, 2004.
Applying and Validating Fracture Methods to Structural Analysis of Aircraft Components—Practical Issues and Challenges
Hoyt, D.M., Walker, T.H., Graesser, D.L.
FAA/ASTM Workshop on Computational Fracture Mechanics for Composites, Salt Lake City, UT March 22-23, 2004.
Damage Assessment for Composite Sandwich Structure
Walker, T.H., Graesser, D.L., Ward, S.H., Floyd, J.F., Razi, H., Ploubis, V.
AIAA 2003-1596, 44th AIAA/ASME/ASCE/AHS Structures, Structural Dynamics, and Materials Conference, Norfolk, Virginia, 7 – 10 Apr 2003.
Strength and Fatigue Life Modeling of Bonded Joints in Composite Structure
Hoyt, D.M., Ward S.H., Minguet, P.J.
ASTM Journal of Composites Technology & Research, Vol. 24, No. 3, pp. 188-208, July 2002.
Detailed Analysis of a Complex Bonded Joint
Rousseau, C.Q., Ferrie, C., Hoyt, D.M., Ward, S.H.
Presented at the American Helicopter Society (AHS) Hampton Roads Chapter Structures Specialists’ Meeting, Williamsburg, VA, November 2001.
Strength and Fatigue Life Modeling of Bonded Joints in Composite Structure
Hoyt, D.M., Ward, S.H., Minguet, P.J.
American Society for Composites (ASC) 15th Technical Conference, September 2000.
Characterization of Notched Composites Strength with Empirical and Analytical Methods
Bau, H., Hoyt, D.M.
NSE Composites Phase II Final Report to USAF for STTR AF96T009 (AF Contract # F33615-97-C-5013), July 2000.
Fuselage Residual Strength—Response and Prediction
Walker, T. H.
FAA Composite Structural Development Workshop, Renton, Washington, Nov. 29 – Dec.1, 2000.
Open Hole Compression Strength and Failure Characterization in Tape Laminates
Bau, H., Hoyt, D.M., Rousseau, C.Q.
Composite Structures: Theory and Practice, ASTM STP 1383, 2000.
Fatigue Life Modeling of Composite Bonded Joints in Rotorcraft Structure
Hoyt, D.M., Ward, S.H., Bau, H.
NSE Composites Phase I Final Report to US Army for SBIR A98-029 (USAAMCOM TR 99-D-12, ADB248414), July 1999.
Open Hole Compression Strength and Failure Characterization in Tape Laminates
Bau, H., Hoyt, D.M.
presentation to ASTM D-30, Technical Symposium, May, 1999.
Progressive Damage Analysis for Notched Compression Strength
Bau, H., Hoyt, D.M.
American Helicopter Society Conference for Affordable Composite Structures, October, 1998.
Advanced Technology Composite Fuselage—Program Overview
Ilcewicz, L., Smith, P.J., Hanson, C.T., Walker, T.H., Metschan, S.L., Mabson, G.E. Mabson, and Willden, K.S.
NASA CR-4734, 1997.
Advanced Technology Composite Fuselage—Materials and Processes
Scholz, D.B., Dost, E.F., Flynn, B.W., Ilcewicz, L.B., Nelson, K.M., Sawicki, A.J., Walker, T.H., and Lakes, R.S.
NASA CR-4731, 1997.
Advanced Technology Composite Fuselage—Repair and Damage Assessment Supporting Maintenance
Flynn, B.W., Bodine, J.D., Dopker, B., Finn, S.R., Griess, K.H., Hanson, C.T., Harris, C.G.
NASA CR-4733, 1997.
Advanced Technology Composite Fuselage—Structural Performance
Walker, T.H., Minguet, P.J., Flynn, B.W., Carbery, D.J., Swanson, G.D., and Ilcewicz, L.B.
NASA CR-4732, 1997.
Accurate Characterization of Composite Strength through Empirical and Progressive Damage Methods
Bau, H., Hoyt, D.M.
NSE Composites Phase I Final Report to USAF for STTR AF96T009, April, 1997.
Structural Development of Composite Fuselage Cutouts: Window Belt and Door Reinforcements
Polland, D., Dopker, B., Graesser, D., Griess, K., Hanson, C., Scholz, D., and Smith, P.
Sixth NASA Advanced Composite Technology Conference, NASA CP-3326, 1996.
Design Integration of a Composite Aft Fuselage Barrel Section
Hanson, C., Griess, K., Flynn, B., Mabson, G., Polland, D., Walker, T., and Dopker, B.
Sixth NASA Advanced Technology Conference, NASA CP-3326, 1996.
Damage Tolerance of Composite Fuselage Structure
Walker, T., Scholtz, D., Flynn, B., Dopker, B., Bodine, J., Ilcewicz, L., Rouse, M., and McGowan, D.
Sixth NASA/DOD/ARPA Advanced Composite Technology Conference, NASA CP-3326, 1996.
Tension Strength with Discrete Source Damage
Poe, C.C. Jr., Harris, C.E., Coats, T.W., and Walker, T.H.
Fifth NASA Advanced Technology Conference, NASA CP-3294, pp. 369-437, 1995.
Fracture Scaling Parameters of Inhomogeneous Microstructure in Composite Structures
Cairns, D.S., Ilcewicz, L.B., Walker, T.H., and Minguet, P.J.
Composites Science and Technology, vol. 53, issue 2, pp. 223-231, 1995.
Tension Fracture of Laminates for Transport Fuselage – Part IV: Damage Tolerance Analysis
Ilcewicz, L.B., Walker, T.H., Murphy, D.P., Dopker, B., Scholz, D.B., Cairns, D.S., and Poe, C.C. Jr.
Fourth NASA Advanced Composite Technology Conference, NASA CP-3229, pp. 265-298, 1994.
Benchmark Panels
Walker, T.H., Ilcewicz, L.B., Bodine, J.B., Murphy, D.P., and Dost, E.F.
NASA CR-194969, 1994.
Damage Tolerance Analysis of Composite Transport Fuselage Structure
Dopker, B., Murphy, D., Ilcewicz, L., and Walker, T.
35th SDM Conference, AIAA Paper 94-1406, 1994.
Tension Fracture of Laminates for Transport Fuselage—Part III: Structural Configurations
Walker, T.H., Ilcewicz, L.B., Polland, D.R., Bodine, J.B., and Poe, C.C. Jr.
Fourth NASA Advanced Composite Technology Conference, NASA CP-3229, pp. 243-264, 1994.
Far-Field and Near-Field Strain Response of Fiber Placed Structures to Stress Concentrations
Cairns, D.S., Ilcewicz, L.B., and Walker, T.H.
Composites Engineering, Vol. 3, No. 11, pp. 1087-1097, 1993.
Response of Automated Tow Placement Laminates to Stress Concentrations
Cairns, D.S, Ilcewicz, L.B., and Walker, T.H.
Third NASA Advanced Composite Technology Conference, NASA CP-3178, 1993.
Tension Fracture of Laminates for Transport Fuselage – Part II: Large Notches
Walker, T.H., Ilcewicz, L.B., Polland, D.R., and Poe, C.C. Jr.
Third NASA Advanced Composite Technology Conference, NASA CP-3178, pp. 727-758, 1993.
Nonlinear and Progressive Failure Aspects of Transport Composite Fuselage Damage Tolerance
Walker, T., Ilcewicz, L., Murphy, D., and Dopker, B.
Computational Methods for Failure Analysis and Life Prediction, NASA-CP-3230, pp. 11-35, 1993.
Tension Fracture of Laminates for Transport Fuselage—Part I: Material Screening
Walker, T.H., Avery, W.B., Ilcewicz, L.B., Poe, C.C. Jr., and Harris, C.E.
Second NASA Advanced Composite Technology Conference, NASA CP-3154, pp. 197-238, 1992.
Application of a Design-Build Team Approach to Low Cost and Weight Composite Fuselage Structure
Ilcewicz, L.B., Walker, T.H., Willden, K.S., Swanson, G.D., Truslove, G., Metschan, S.L., and Pfahl, C.L.
NASA CR-4418, 1991.
Local Design Optimization for Composite Transport Fuselage Crown Panels
Swanson, G.D., Walker, T.H., Ilcewicz, L.B., Graesser, D.L., Tuttle, M.E., and Zabinsky, Z.
Second NASA/DOD Advanced Composite Technology Conference, NASA CP-3154, pp. 243-262, 1991.
Advanced Technology Composite Fuselage Structure
Ilcewicz, L.B, Smith, P.J., Hanson, C.T., Walker, T.H., Metschan, S.L., Mabson, G.E., and Willden, K.S.
First NASA Advanced Composite Technology Conference, NASA CP-3104, Part 1, pp. 127-155, 1991.
Cost Studies for Commercial Fuselage Crown Designs
Walker, T. H., Smith, P. J., Truslove, G., Willden, K. S., Metschan, S. L., and Pfahl, C. L.
First NASA Advanced Composite Technology Conference, NASA CP-3104, 1991.
Intralaminar Fracture Toughness Characterization for Matrix Cracking in Composites
Coxon, B., Walker, T., Ilcewicz, L., and Seferis, J.
Society of Experimental Mechanics, 1987
A Singular Finite-Element Analysis of Interface Fracture in Anisotropic Materials
Walker, T.H.
Masters Thesis, University of Washington, 1986.