Mechanical identification of composites [proceedings of the European Mechanics Colloquium 269, "Experimental Identification of the Mechanical Characteristics of Composite Materials and Structures" held in Saint-Etienne, France, 3 - 6 December, 1990

Front Matter....Pages i-xv Identification of the rigidities of composite systems by mixed numerical/experimental methods....Pages 1-15 Measurement of Complex Moduli of Composite Materials and Discussion of Some Results....Pages 16-29 Moire Interferometry for Composites....Pages 31-43 A Damage Approach for Composite Structures: Theory and Identification....Pages 44-57 Identification of Temperature Dependence for Orthotropic Material Moduli....Pages 58-66 Experimental Identification of Complex Stiffnesses of Composite Materials by Ultrasonic Wave Propagation....Pages 67-74 A Hybrid Method to Determine Material Parameters of Composites....Pages 75-81 Non Determined Tests as a Way to Identify Wood Elastic Parameters the Finite Element Approach....Pages 82-90 Measurement of Laminate Bending Elastic Parameters from Non-Uniform Strain Fields....Pages 91-98 Identification of the Shear Properties of the Lamina in the Framework of Plasticity....Pages 99-106 Parametric Identification of Mechanical Structures: General Aspects of the Methods Used at the LMA....Pages 107-116 Material Parameters in Anisotropic Plates....Pages 117-124 Evaluation of Global Composite Laminate Stiffnesses by Structural Wave Propagation Experiments....Pages 125-132 Dynamic Measurements of Elastic Properties of Filament — Wound Cylindrical Shells....Pages 133-140 Torsion Response Analysis of T300/914 and T800/914 Unidirectional Specimens....Pages 141-148 A Computerized Test Setup for the Determination of the In-Plane and Out-of-Plane Shear Modulus in Orthotropic Specimens....Pages 149-155 Some Experience from the Application of the Iosipescu Shear Test....Pages 156-163 Constitutive Prediction for a Non-Linear Orthotropic Media....Pages 164-171 Creep and Relaxation of Coated Fabrics under Biaxial Loading....Pages 172-180 Joints and Assemblies of Composite Material Structural Elements: Characterization of Adhesives in Bulk Form and in Composite Structures....Pages 181-189 Static and Dynamic Characterization of Composites, Using a Fourth Generation Programming Language on a Macintosh....Pages 190-197 Use of the Shadow Moire Technique for the Investigation of the Impact Behaviour of Composite Laminates....Pages 198-205 Delamination Detection Via Holographic Interferometry Techniques....Pages 206-212 Dynamic Failure Processes in Fibre-Reinforced Composites....Pages 213-222 Effect of Strain Rate on the Compressive Strength of Woven Glass-Reinforced/Epoxy Laminates....Pages 223-230 Characterization of Highly Anisotropically Reinforced Solids in High Velocity Tension....Pages 231-237 Determination of the Effective Mechanical Response of Polymer Matrix Composites Via Microstuctural Data....Pages 238-245 A Microstructural Method for Predicting the Damping of Lamina....Pages 246-253 Theoretical and Experimental Study Technique of the Mechanical Properties of Fiber-Reinforced Laminates and of the Strain Features of Structural Elements....Pages 254-261 Dynamic Properties of Layer Reinforced by Two Families of Fibres....Pages 262-269 Micromechanical Modelling of Unidirectional Glassfiber Reinforced Polyester: Effect of Matrix Shrinkage....Pages 270-277 Plastic Failure of Unidirectional Fibrous Composite Materials with Metal Matrix in Compression....Pages 278-286 Analytical Model of Fibre Pull-Out Mechanism....Pages 287-294 Nonlinear Viscoelastic Behavior of the Fiber-Matrix Interphase: Theory and Experiment....Pages 295-302 Empirical Model Building and Surface Response Methodology Applied to Sclerometrical Investigation for Refractories Concrete....Pages 303-310 Development of Fatigue Damage Mechanics for Application to the Design of Structural Composite Components....Pages 311-326 Influence of Fibre Orientation on the Cracking and Fracture Energy in Brittle Matrix Composites....Pages 327-334 Application of the Method of Caustics to Fiber-Reinforced Materials....Pages 335-341 Modelling of Orthotropic Layered Structures Containing Cracks in the Interfaces....Pages 342-349 A Criterion of Mixed Mode Delamination Propagation in Composite Material....Pages 350-361 Fracture and Fatigue Damage in a CSM Composite....Pages 362-369 Non Linear Behaviour of Ceramic Matrix Composites....Pages 370-377 Notched Strength and Damage Mechanism of Laminated Composites with Circular Holes....Pages 378-385 Damage Modeling and Experimental Tools for 3D Composites....Pages 386-397 Increasing Energy Absorption by “Rope Effect” in Brittle Matrix Composites....Pages 398-405 Specific Damping of a Carbon/Epoxy Laminate under Cyclic Loading....Pages 406-414 The Application of Automated Ultrasonic Inspection for Damage Detection and Evaluation in Composite Materials....Pages 415-423 The Use of Vibrothermography for Monitoring Damage Evolution in Composite Materials....Pages 424-432 Acoustic Emission Source Location in Anisotropic Composite Plates....Pages 433-441 Back Matter....Pages 443-447 The widespread idea that composite materials are materials which can be tailored toachieveanydesired structuraland functional performances iswrong, since the present commonly used mechanical characterization and designing procedures do not incorporate the two prominent features of these materials, their anisotropy and heterogeneity, from the starting point of the analysis. Anisotropy and heterogeneity involve particular effects, at different scales of observation, that cannot be regarded as simple extensions ofany phenomena occurring in homogeneous or isotropic media. So the challenge is real and further industrial applications ofcomposite!> are closely related to new ways of approaching theexperimentalidentification ofsuch materials orstructuresin the rational frameworkofthe mechanicsofheterogeneousandanisotropic media. The European Mechanics Committee sponsored a Colloquium on Experi­ mental Identificationofthe Mechanical CharacteristicsofCompositeMaterials and Structures in Saint-Etienne, France, on 3-6 December 1990. Its main purpose was to present, criticize and survey new developments in analysis techniques, data treatments, mechanical modelling and identification approaches regarding the anisotropic behaviour ofcomposite structures. The fourty nine papers, including the general lectures, touched four main aspects: • quasi-static and dynamic mechanical tests suited to anisotropic media; • identification methodologies based on new data treatments; • displacement and strain fields measurement based on optical methods; • damage and cracking modellingofanisotropic and heterogeneous media