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PROGRESSIVE FAILURE ANALYSIS IN POST-BUCKLED CFRP STIFFENED PANEL UNDER COMPRESSION
Nidhal Bouslama (Université de Sherbrooke) Ahmed Maslouhi (Université de Sherbrooke) Patrice Masson (Mechanical Engineering Department) Said Jazouli (Bombardier Aerospace)
A finite-element model is developed based on progressive failure analysis (PFA). The proposed model shows ability to predict correctly the final strength and simulate main damage modes involved in post buckled CFRP stiffened panel under compression.
ROBUST SIZING OF LARGE THIN-WALLED, COMPOSITE STRUCTURES SENSITIVE TO BUCKLING.
Vincent De Groof (Intales GmbH) Herbert Haller (Intales GmbH) Manfred Gratt (Intales GmbH)
An iterative method for nonlinear buckling analysis using commercial FE solvers is presented. The method is verified and compared using results of a full scale test campaign.
TORSION-INDUCED BUCKLING OF VARIABLE STIFFNESS COMPOSITE CYLINDERS
Mohammad Rouhi (Concordia University, Montreal) Hossein Ghayoor (Concordia University) Suong V. Hoa (Concordia University) Mehdi Hojjati (Concordia University)
Variable stiffness composite cylinders with circular and elliptical cross-sections made by fiber steering are designed and optimized for maximum torsion-induced buckling capacity. A metamodeling based design optimization method is used for this work.
FATIGUE BEHAVIOUR AND DAMAGE TOLERANT DESIGN OF COMPOSITE BONDED JOINTS FOR AEROSPACE APPLICATION
Thomas Kruse (Airbus Operations) Thomas Körwien (Airbus Defence and Space) Roman Ruzek (VZLU)
Summary of the work performed on fatigue testing and crack arresting of high load transfer bonded CFRP joints by means of disbond stopping features. Target is the development of a new design of bonded Joints compliant with todays certification rules.
MECHANISMS TO ARREST A CRACK IN THE ADHESIVE BONDLINE OF FATIGUE LOADED CFRP-JOINTS USING A RIVETLESS NUTPLATE JOINT
Ronny Sachse (University of Stuttgart) Anthony K. Pickett (Institut of Aircraft Design) Michael Gnädinger (Institut of Aircraft Design) Peter Middendorf (University of Stuttgart)
Adhesively bonded composite joint configurations with different mechanical fasteners were investigate both experimentally and numerically to identify and quantify mechanisms that arrest crack growth in the adhesive bondline when loaded in fatigue.
ARRESTING CRACK IN COMPOSITE BONDED JOINT USING FIBER-REINFORCEMENT-BASED DESIGN FEATURE
Shu Minakuchi (University of Tokyo) Nobuo Takeda (University of Tokyo)
Interlocked continuous fibers introduced in adhesive layer bridged crack and suppressed its propagation. Mode II fracture toughness tripled compared to specimen without arrester. New manufacturing method for robust arresting was also demonstrated.
A STUDY OF PHYSICAL AND MECHANICAL PROPERTIES OF A NANOMODIFIED THERMOPLASTIC ADHESIVE IN NORMAL AND ACCELERATED AGEING CONDITIONS
Raffaele Ciardiello (Politecnico di Torino) Giovanni Belingardi (Politecnico di Torino) Brunetto Martorana (Centro Ricerche Fiat S.C.p.A.) Domenico Fondacaro (Centro Ricerche Fiat S.C.p.A.) Valentina Brunella (University of Torino)
An innovative technology, based on magneto sensitive nanoparticles dispersed in hot melt adhesive (HMA), has been studied in order to reduce the cycle time of a vehicle and to allow for the recycling at the vehicle end of life.
A PROGRESSIVE DAMAGE MODEL FOR BOLTED JOINTS IN THREE-DIMENSIONAL WOVEN CARBON COMPOSITES SUBJECTED TO SINGLE-BOLT, DOUBLE-SHEAR LOADING
Kyle Warren (Albany Engineered Composites) Harun Bayraktar (Albany Engineered Composites) Roberto Lopez-Anido (University of Maine) Senthil Vel (University of Maine)
This paper explores a first-pass progressive damage model for a 3D woven aerospace composite single-bolt, double-shear joint. A mesoscale approach was adopted to separately consider the failure response of impregnated tows from surrounding matrix.
INFLUENCE OF THE SPECIMEN WIDTH ON THE EXPERIMENTAL MEASUREMENT OF THE COHESIVE LAW USING THE J-INTEGRAL APPROACH
Mario Cabello (IK4-IKERLAN Technology Research Centre) Javier Zurbitu (IK4-IKERLAN Technology Research Centre) Albert Turon (AMADE, Universidad de Girona) Carlos Sarrado (AMADE, Universidad de Girona) Jordi Renart (AMADE, Universidad de Girona) Félix Martínez (IK4-IKERLAN Technology Research Centre)
The influence of the specimen width in the procedures to obtain cohesive laws by J-integral method using an advanced analytical DCB model with a coupled cohesive damage is studied and a new correction function has been proposed.
COMPARATIVE ANALYSIS OF IN-PLANE AND OUT-OF-PLANE MECHANICAL BEHAVIOR OF SPOT-WELDED AND MECHANICALLY FASTENED JOINTS IN THERMOPLASTIC COMPOSITES
Tian Zhao (Delft University of Technology) Genevieve Palardy (HS Delft) Irene Fernandez Villegas (Delft University of Technology) Calvin Rans (Delft University of Technology) Rinze Benedictus (Delft University of Technology)
The in-plane and out-of-plane mechanical behaviour of ultrasonically spot-welded and mechanically fastened joints are characterized through double-lap shear and pull-through tests. Fractography is used to investigate the failure mechanisms of joints.
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