ساختارهای مرکب: نظریه و عمل

This comprehensive new ASTM publication reflects the latest worldwide research in composite structures technology, and specifically focuses on structural certification and qualification concerns. 29 peer-reviewed papers, written by academia, government, and industry experts, are divided into the following sections: • Structural Damage Tolerance • Skin-Stringer Behavior • Rotorcraft and Propeller Structural Qualification Issues • Bolted Joint Analysis • Test Methods • Strength Prediction • Environmental Effects This publication will be of interest to • Engineers and Designers involved with Composite Materials and Structures • Civil Engineers • Aerospace, Auto, and Marine Engineers, and Designers • Academics Foreword......Page 4 Contents......Page 5 Overview......Page 7 USAF Experience in the Qualification of Composite Structures......Page 14 A Review of Some Key Developments in the Analysis of the Effects of Impact Upon Composite Structures......Page 23 Certification Cost Reduction Using Compression-After-Impact Testing......Page 40 Mechanisms and Modeling of Delamination Growth and Failure of Carbon-Fiber Reinforced Skin-Stringer Panels......Page 59 Parametric Study of Three-Stringer Panel Compression-After-Impact Strength......Page 82 A Method for Calculating Strain Energy Release Rates in Preliminary Design of Composite Skin/Stringer Debonding Under Multiaxial Loading......Page 115 Fail-safe Approach for the V-22 Composite Proprotor Yoke......Page 140 RAH-66 Comanche Building Block Structural Qualification Program......Page 149 The Effects of Marcel Defects on Composite Structural Properties......Page 167 Influence of Ply Waviness on Fatigue Life of Tapered Composite Flexbeam Laminates......Page 197 Structural Qualification of Composite Propeller Blades Fabricated by the Resin Transfer Molding Process......Page 219 Three-Dimensional Stress Analysis and Failure Prediction in Filled Hole Laminates......Page 239 Damage-Tolerance-Based Design of Bolted Composite Joints......Page 251 Open Hole Compression Strength and Failure Characterization in Carbon/Epoxy Tape Laminates......Page 281 The Influence of Fastener Clearance Upon the Failure of Compression-Loaded Composite Bolted Joints......Page 301 Characterizing Delamination Growth in a 0°/45° Interface......Page 318 New Experiments Suggest that All Shear and Some Tensile Failure Processes are Inappropriate Subjects for ASTM Standards......Page 331 Effect of Friction on the Perceived Mode II Delamination Toughness from Three- and Four-Point Bend End-Notched Flexure Tests......Page 341 Finite Element Analysis of Delamination Growth in a Multidirectional Composite ENF Specimen......Page 352 Comparison of Designs of CFRP-Sandwich T-Joints for Surface-Effect Ships Based on Acoustic Emission Analysis from Load Tests......Page 373 Development of a Test Method for Closed-Cross-Section Composite Laminates Subjected to Compression Loading......Page 389 Tension Pull-off and Shear Test Methods to Characterize 3-D Textile Reinforced Bonded Composite Tee-Joints......Page 405 What the Textbooks Won't Teach You About Interactive Composite Failure Criteria......Page 418 Curved Laminated Beams Subjected to Shear Loads, Moments, and Temperature Changes......Page 442 Damage, Stiffness Loss, and Failure in Composite Structures......Page 457 Compressive Strength of Production Parts Without Compression Testing......Page 475 Environmental Effects on Bonded Graphite/Bismaleimide Structural Joints......Page 496 Accelerated Tests of Environmental Degradation in Composite Materials......Page 516 The Effects of Initial Imperfections on the Buckling of Composite Cylindrical Shells......Page 530 Author Index......Page 552 Subject Index......Page 554