Book of Abstracts

R. Joffe, L. Pupure, J. Varna, L. Wallström (Editors)

PROGRAM

Keynote lecture chaired by L. Pupure
8:30-9:15
UNCONVENTIONAL EXPERIMENTAL APPROACHES TO INVESTIGATE THE COMPRESSIVE BEHAVIOUR OF CARBON FIBRE COMPOSITES

Michael R. Wisnom1

1Bristol Composites Institute (ACCIS), University Walk, Bristol, BS8 1TR, UK

Keywords: Compression, Bending, Hybrids, Size effect, Strain gradient

Oral session "Phenomena in complex loading ‐ 2" chaired by F. Pierron and J. Renart
9:15-9:55
9:15-9:35 ON THE IN-SITU EFFECT UNDER TRANSVERSE SHEAR AND THE ASSOCIATED THIN-PLY LAMINATE IMPACT RESPONSE (ID 143)

S.M. García-Rodríguez1, J. Costa1, V. Singery2, A. Sasikumar1

1AMADE research group, University of Girona, Av. Universitat de Girona, 4. 17003 Girona, Spain
2Chomarat, 39 Avenue de Chabannes, 07160, Le Cheylard, France

Keywords: X-ray tomography, thin-plies, impact, in-situ effect

9:35-9:55 SPLIT-DISK TEST WITH 3D DIGITAL IMAGE CORRELATION STRAIN MEASUREMENT FOR FILAMENT WOUND COMPOSITES (ID 148)

Yinglun Zhao1,3, Pavel Druzhinin2,3, Kirill Ilin1,3, Jan Ivens4, Dirk Vandepitte2, Stepan V. Lomov1,3

1Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 bus 2450, B-3001 Leuven, Belgium
2Department of Mechanical Engineering, KU Leuven, Kasteelpark Arenberg 44 bus 2420, B-3001 Leuven, Belgium
3SIM vzw, Technologiepark 935, B-9052 Zwijnaarde, Belgium
4Department of Materials Engineering, KU Leuven Campus De Nayer J. De Nayerlaan 5, B-2860 Sint-Katelijne-Waver, Belgium

Keywords: Split-disk test, Filament wound composites, Strain measurement, Digital image correlation

Coffee Break
9:55-10:20
Oral session "Micromechanics" chaired by J. Varna and A. Pupurs
10:20-12:20
10:20-10:40 SYNERGIES IN THE FINAL FAILURE OF THIN PLY COMPOSITES: NEW MODELLING INSIGHTS TO EXPLAIN THE EXPERIMENTAL OBSERVATIONS (ID 150)

Yentl Swolfs1

1Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 box 2450, 3001 Leuven, Belgium

Keywords: Thin ply composites, synergetic effects, ultimate tensile strength

10:40-11:00 MATRIX AND INTERFACE CRACKING IN CROSS-PLIED MULTIFUNCTIONAL STRUCTURAL COMPOSITE MICRO-BATTERY (ID 158)

Johanna Xu1

1Department of Industrial and Materials Science, Chalmers University of Technology, SE-41296 Göteborg, Sweden

Keywords: Multifunctional composites, micro-battery, Finite elements, microdamage, debonds

11:00-11:20 FIBRE-RELATED DAMAGE EVOLUTION IN UNIDIRECTIONAL PLIES UNDER CYCLIC TENSION LOADINGS (ID 146)

Paolo A. Carraro1, Lucio Maragoni1, Oscar Castro2, Marino Quaresimin1

1Department of Management and Engineering, University of Padova, Stradella S. Nicola, 3, Vicenza, Italy
2Department of Wind Energy, Technical University of Denmark, Denmark

Keywords: Fatigue, damage evolution, fibre failure

11:20-11:40 NUMERICAL STUDY ON EFFECT OF FIBRE MISALIGNMENT AND VARIATION OF COHESIVE PROPERTIES ON FIBRE/MATRIX DEBONDING (ID 149)

Pavel Druzhinin1,2, Qiang Liu3, Stepan V. Lomov2,3 and Dirk Vandepitte1

1Department of Mechanical Engineering, KU Leuven, Celestijnenlaan 300 bus 2420, 3001 Leuven, Belgium
2SIM vzw, Technologiepark 935, B-9052 Zwijnaarde, Belgium
3Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 bus 2450, 3001 Leuven, Belgium

Keywords: Variability of fibre reinforced composites, Representative volume element, Embedded region, Cohesive zone, Parametric study

11:40-12:00 ELIMINATION OF VOLUME REDUNDANCY IN EMBEDDED ELEMENTS/COHESIVE ZONES MODELLING OF INTERFACE AND MATRIX DAMAGE MODELLING IN FIBRE REINFORCED COMPOSITES (ID 138)

Fangzhou Lu1, Pavel Druzhinin2, Qiang Liu3, Dirk Vandepitte2, Larissa Gorbatikh3 and Stepan V. Lomov3

1State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, 210016 Nanjing, P.R. China
2Department of Mechanical Engineering, KU Leuven, Kasteelpark Arenberg 41 bus 2420, 3001 Leuven, Belgium
3Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 bus 2450, 3001 Leuven, Belgium

Keywords: Fibre reinforced composites, Embedded zones, Cohesive zones, Progressive damage

12:00-12:20 PLY-THICKNESS EFFECT ON FIBER-MATRIX INTERFACE CRACK GROWTH (ID 160)

Luca Di Stasio1,2, Janis Varna1 and Zoubir Ayadi2

1Luleå University of Technology, University Campus, SE-97187 Luleå, Sweden
2Université de Lorraine, EEIGM, 6 Rue Bastien Lepage, F-54010 Nancy, France

Keywords: Polymer matrix composites, Debonding, Ply-thickness effect, Fracture mechanics

Lunch
12:20-13:20
Oral session "Stress gradients" chaired by L.P. Mikkelsen and F. Mujika
13:20-14:20
13:20-13:40 PREDICTION AND EXPERIMENTAL VALIDATION OF THE NOTCH (IN)SENSITIVITY OF TOW BASED DISCONTINUOUS COMPOSITES (ID 109)

Marco Alves1, Soraia Pimenta1, Yizhuo Li1, Tahreem Naveed1, Florian Gaudron1

1Department of Mechanical Engineering, South Kensington Campus, Imperial College, London, SW7 2AZ, United Kingdom

Keywords: Discontinuous composites, Notch-sensitivity, Numerical modelling

13:40-14:00 A PHYSICALLY BASED APPROACH DEDICATED TO OPEN-HOLE STRENGTH WITH A NEW GENERATION MATERIAL (ID 154)

J. Germain1, J. Rannou1, F. Laurin1 and F. Congourdeau2

1ONERA/DMAS, Université Paris Saclay , F-92322 Châtillon – France
2Dassault Aviation, 78 Quai Marcel Dassault, 92210 Saint-Cloud – France

Keywords: damage, failure, open-hole, modelling, finite-element method

14:00-14:20 DEVELOPMENT OF A NEW HYBRID COMPOSITE PEDICLE SCREW: NUMERICAL AND EXPERIMENTAL INVESTIGATION (ID 106)

Yves N. Becker1, Nicole Motsch1 and Joachim Hausmann1

1Institut für Verbundwerkstoffe GmbH, Erwin-Schrödinger-Straße, Geb. 58, 67663 Kaiserslautern, Germany

Keywords: CF-PEEK, Finite element modelling, Hybrid structure, Parametric optimization, Pedicle screw

Oral session "Processing induced behaviour" chaired by L.P. Mikkelsen and F. Mujika
14:20-15:00
14:20-14:40 ON OPTICAL FIBER BRAGG GRATINGS FOR IN-SITU CURE-INDUCED STRAIN MEASUREMENTS (ID 139)

Lars P. Mikkelsen1, Jonas Huether1,2, Gilmar Pereira1 and Hans Lilholt1

1Composite Mechanics and Structures, DTU Wind Energy, DTU Risø Campus, 4000 Roskilde, Denmark
2Karlsruhe Institute of Technology, Institute for Applied Materials, Hybrid and Lightweight Materials, Kaiserstraße 12, 76131 Karlsruhe, Germany

Keywords: Residual stresses, Fatigue, Glass-fibre composites, Wind turbine blades

14:40-15:00 EFFECT OF DEGREE OF CURE ON NON-LINEAR BEHAVIOUR OF POLYMERIC MATERIALS (ID 165)

Liva Pupure1, Sibin Saseendran2, Janis Varna1

1Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, Sweden
2RISE SICOMP, Box 271, SE-94129, Piteå, Sweden

Keywords: Degree of Cure, nonlinearity, viscoplasticity, viscoelasticity

Announcement of award winners and goodbye
15:00-15:30
Goodbye coffee break
15:30-16:00