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FAILURE ANALYSIS OF COMPOSITE PRESSURE VESSELS BASED ON THE ENHANCED FILAMENT WINDING SIMULATION: COMPARING LAYER-BASED AND FIBER BUNDLE-BASED APPROACHES
Jörg Multhoff (ISATEC GmbH)
Filament-wound composite pressure vessels are usually modeled using a multi-layered approach based on the classical laminate theory. A new approach based on a finite element formulation with an embedded fiber-bundle model is being explored.
APPLICATIONS OF EQUILIBRIUM OF CONFIGURATIONAL FORCES FOR THE MEASUREMENT OF COHESIVE LAWS
Ulf Stigh (University of Skövde)
A methodology to develop test set-ups to measure cohesive laws is presented. This is based on equilibrium of configurational forces. Methods to measure data for adhesive layers and kink-bands in unidirectional composites are given.
STRESS INTENSITY FACTORS AND ENERGY RELEASE RATE FOR SYMMETRICALLY LAMINATED PLATES BASED ON THE CLASSICAL PLATE THEORY
Kuang-Chong Wu (National Taiwan University) Horn-Jiunn Sheen (National Taiwan University)
The stress and displacement fields near the tip of a through crack in an anisotropic elastic plate are examined according to the classical plate theory. Bending stress intensity factors are defined and the associated energy release rate derived.
AICC – AUTOMATIC INSPECTION OF CUT CARBON
Markus Soutschek (Fraunhofer IPA)
In this article, measurement methods and an optical test device for determining the quality of machined components (drill holes and edges) off CFRP are introduced. The measuring method was implemented in terms of a handset with the name AICC.
DAMAGE MODEL FOR THE COMPOSITE MATERIAL UNDER MUTIAXIAL LOADING
Pavel Dodonov (Krylov State Research Center) Nikolai Fedonyuk (Krylov State Research Centre)
In this study we examine the mechanical properies of the FRP made of NCF. We've analyzed and modified damage model, and calibrated it based on results of cyclic multiaxial loading experiments. The model is used to predict properties of hybrid FRP.
MODELLING DISCRETE MATRIX CRACKS, SPLITS AND CRACK-INDUCED DELAMINATION WITH THE FLOATING NODE METHOD
Bo-Yang Chen (National University of Singapore) Tong-Earn Tay (National University of Singapore) Silvestre Pinho (Imperial College London) Vincent B.C. Tan (National University of Singapore)
This paper presents the modelling of matrix cracks, splits and the crack-induced delamination using the floating node method.
DAMAGE AND STRENGTH ANALYSIS OF OPEN-HOLE LAMINATED PLATES UNDER TENSILE, COMPRESSIVE AND BENDING LOADINGS
Frederic Laurin (ONERA-The French aerospace Lab) Cédric Julien (ONERA-The French aerospace Lab) Pascal Paulmier (ONERA-The French aerospace Lab)
The present paper deals with an experimental study on the damage and failure mechanisms encountered in laminated open-hole plates subjected bending loading.
EFFECT OF THE PLY STACKING SEQUENCE ON THE TRANSLAMINAR FRACTURE COHESIVE LAW
Adrián Ortega Novillo (AMADE, Universidad de Girona) Pere Maimí (AMADE, Universidad de Girona) Emilio González (AMADE, Universidad de Girona) Jose Ramon Sainz de Aja (Aernnova Engineering Solutions Ibérica S.A.) Federico Martin De La Escalera (Aernnova Engineering Solutions Ibérica S.A.)
The translaminar Cohesive Law of several hybrid laminates are measured from the fracture test of a Compact Tension specimen. The measured Cohesive Laws are analyzed by comparing the different locations of each material along the laminate.
AN ANISOTROPIC DAMAGE MODEL FOR CMCS UNDER NON-PROPORTIONAL LOADING CONDITIONS
Emmanuel Baranger (Université Paris-Saclay)
This paper presents a damage model describing the mechanical behavior of SiC/SiC composites under multi-axial non-proportional loadings. Fourth order damage variables are used associated to an anisotropic evolution law.
TOWARDS THE MESH INSENSITIVE MODELING OF COMPOSITE DAMAGE IN AN EXPLICIT CRASH SIMULATION
Sebastian Müller (ESI Group) Patrick De Luca (ESI Group) Alain Tramecon (ESI Group)
The contribution presents a hybrid continuum / cohesive ply damage model in order to eliminate the mesh dependence of classical continuum damage formulations.
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