This book contains a collection of major research contributions over the last decade in the area of composite materials and sandwich structures supported by the Of?ce of Naval Research (ONR) under the direction of Dr. Yapa D. S. Rajapakse. The Solid Mechanics Research Program at ONR supports research in mechanics of high performancematerialsfortheeffectivedesignofdurableandaffordableNavalstr- tures. Such structures operate in severe environments, and are designed to withstand complex multi-axial loading conditions, including highly dynamic loadings. The - fective design of these structures requires an understanding of the deformation and failure characteristics of structural materials, and the ability to predict and control their performance characteristics. The major focus is on mechanics of composite materials and composite sandwich structures. The program deals with understa- ing and modeling the physical processes involved in the response of glass-?ber and carbon-?ber reinforced composite materials and composite sandwich structures to static, cyclic, and dynamic, multi-axial loading conditions, in severe environments (sea water, moisture, temperature extremes, and hydrostatic pressure). This anthology consists of 30 chapters written by ONR contractors and rec- nized experts in their ?elds and serves as a reference and guide for future research.

Preface; List of Contributors; A. COMPOSITE MATERIALS AND STRUCTURES: Mechanical and Failure Behavior: Accelerated Testing for Long-Term Durability of Various FRP Laminates for Marine Use, by Y. Miyano and M. Nakada; 2. Carbon Fiber - Vinyl Ester Interfacial Adhesion Improvement by the Use of an Epoxy Coating, by F. Vautard, L. Xu and LT. Drzal; 3. A Physically Based Cumulative Damage Formalism, by R. M. Christensen; 4. Delamination of Composite Cylinders, by P. Davies and L. A. Carlsson; Dynamic Effects: Fiber-Reinforced Composites, by R. C. Batra and N.M. Hassan; 2. Post-Impact Fatigue Behavior of Woven and Knitted Fabric CFRP Laminates for Marine Use, by I. Kimpara and H. Saito; 3. Dynamic Interaction of Multiple Damage Mechanisms in Composite Structures, by R. Massabo; 4. State-of-the-Art in Impulsive Loading of Marine Composites, by M. Porfiri and N. Gupta; B: SANDWICH MATERIALS AND STRUCTURES: Mechanical and Failure Behavior: Failure Modes of Composite Sandwich Beams, by I.M. Daniel and E.E. Gdoutos; 2. Localised Effects in Sandwich Structures with Internal Core Junctions: Modelling and Experimental Characterisation of Load Response, Failure and Fatigue, by M. Johannes and O. T. Thomsen; 3. Damage Tolerance of Naval Sandwich Panels, by D. Zenkert; 4. Size Effect on Fracture of Composite and Sandwich Structures, by E. E. Gdoutos and Z. P. Bazant; 5. Elasticity Solutions for the Buckling of Thick Composite and Sandwich Cylindrical Shells under External Pressure, by G. Kardomateas; 6. An Improved Methodology for Measuring the Interfacial Toughness of Sandwich Beams, by Q. Bing and B. D. Davidson; 7. Structural Performance of Eco-Core Sandwich Panels, by K. Shivakumar and H. Chen; 8. The Use of Neural Networks to Detect Damage in Sandwich Composites, by D. Serrano, F. A. Just-Agosto, B. Shafiq and A. Cecchini; 8. On the Mechanical Behavior of Advanced Composite Material Structures, by J. Vinson; 10. Application of Acoustic Emission Technology to theCharacterization and Damage Monitoring of Advanced Composites, by E. O. Ayorinde; Dynamic Effects: Ballistic Impacts on Composite and Sandwich Structures, by S. Abrate; 2. Performance of Novel Composites and Sandwich Structures under Blast Loading, by A. Shukla, S. A. Tekalur, N. Gardner, M. Jackson and E. Wang; 3. Single and Multisite Impact Response of S2-Glass/Epoxy Balsa Wood Core Sandwich Composites, by L.J. Deka and U. K. Vaidya; 4. Real-time Experimental Investigation on Dynamic Failure of Sandwich Structures and Layered Materials, by L. R. Xu and A.J. Rosakis; 5. Characterization of Fatigue Behavior of Composite Sandwich Structures at Sub-zero Temperatures, by S. M. Soni, R. F. Gibson and E.O. Ayorinde; 6. Impact and Blast Resistance of Sandwich Plates, by G. J. Dvorak, Y. A. Bahei-El-Din and A. P. Suvorov; 7. Modeling Blast and High Velocity Impact of Composite Sandwich Panels, by M. S Hoo Fatt, L. Palla and D. Sirivolu; C. CONSTITUENT MATERIALS: 1. Effect of Nanoparticle Dispersion on Polymer Matrix and their Fiber Nanocomposites, by M.F. Uddin and C.T. Sun; 2. Experimental and Analytical Analysis of Mechanical Response and Deformation Mode Selection in Balsa Wood, by M. Vural and G. Ravichandran; 3. Mechanics of PAN Nanofibers, by I. Chasiotis and M. Naraghi; 4. Characterization of Deformation and Failure Modes of Ordinary and Auxetic Foams at Different Length Scales, by Fu-pen Chiang; 5. Fracture of Brittle Lattice Materials: A Review, by I. Quintana-Alonso and N. A. Fleck; Author Index.