1

PROGRAMME

CompTest 2019 9th International Conference on Composite testing and model identification,

27-29 May 2019 in Kulturens Hus, Luleå, Sweden.

2

Chairs

Roberts Joffe Liva Pupure Janis Varna Lennart Wallström

Co-chairs

Fabrice Pierron, University of Southamptons, UK

Michael Wisnom, University of Bristol, UK

SPONSORS:

3

International scientific committeeJohn Botsis, EPFL, SwitzerlandPedro Camanho, University of Porto, PortugalJosep Costa, University of Girona, SpainCarlos Dávila, NASA Langley Research Center, USAStephen Hallett, University of Bristol, UKEndel Iarve, University of Texas at Arlington, USACarlos González, IMDEA, SpainDavid Mollenhauer, AFRL, USASilvestre Pinho, Imperial College London, UKAlbert Turon, University of Girona, SpainFrans van der Meer, Delft University of Technology, NetherlandsFrédéric Laurin, ONERA, FrancePeter Davies, IFREMER, Marine Structures Laboratory, FranceBodo Fiedler, TUHH, HamburgStepan Lomov, KU Leuven, BelgiumRobin Olsson, Rise SICOMP, SwedenOle Thomsen, University of Southampton, UKMarino Quaresimin, University of Padova, ItalyKalyanasundaram, Shankar, Australia

National Advisor groupKristofer Gamstedt, Uppsala UniversityLeif Asp, Chalmers University of TechnologyPatrik Fernberg, Luleå University of TechnologyMohamed Loukil, RISE SICOMPAndrejs Pupurs, Luleå University of TechnologyMalin Åkermo, KTH Royal institute of Technology

Local organizing committeeZainab Al-MaqdasiNawres Al-RamahiHiba Ben KahlaLuca Di-StasioPietro CuccarolloQuentin Poiret

4

“Damage and strength predictions of 3D woven composite structures: experimental characterization, size effect and modelling.”

By Frédéric LAURIN who Research engineer at Onera, the French aerospace laboratory, head of the research unit “Characterization and Modelling of Composite Materials”. His research in the field of damage and failure modelling of com-posite materials.

Keynote speakers

“Testing and modelling of NCF and thin ply composites during impact, crash and triaxial loading.”

By Dr Robin Olsson who currently leads the Technology Platform Structural Design at RISE SICOMP. He also leads several research projects on damage initiation and growth in NCF composites during crash and impact, currently involving three PhD students. Previously he has been Senior Lecturer at the Department of Aeronautics at Imperial College London, and researcher at the Aeronautical Research Institute of Sweden, with main focus on impact response and damage tolerance of composites.

“Unconventional Experimental Approaches to Investigate the Compressive Behaviour of Carbon Fibre Composites.”

By Michael Wisnom who is Professor of Aerospace Struc-tures at the University of Bristol, Director of Bristol Composites Institute (ACCIS) and Editor in Chief of Composites Part A. His research is on the mechanics and failure of composites: developing novel test configurations, analysis approaches and material architectures.

5

Time Nr. May 27th

8:00-8:30 Registrations

8:30-8:45 Welcome Speaches

8:45-9:30 201

Keynote lecture chaired by S. Lomov

Damage and strength predictions of 3D woven composite structures: experimental characterization, size effect and modelling - F. Laurin, V. Medeau, S. Mousillat, J. Rannou (ONERA/DMAS, ISAE-SUPAERO)

9:30-10:30 Oral session “Intralaminar Cracking - 1” chaired by M. Hajikazemi and P. Fernberg

9:30-9:50 144 ELASTIC PROPERTIES OF COMPOSITE LAMINATES IN THE PRESENCE OF OFFAXIS CRACKS AND DELAMINATION: MODELLING AND MEASUREMENTS - Paolo A. Carraro, Lucio Maragoni, Marino Quaresimin (University of Padova)

9:50-10:10 156 EXACT EXPRESSIONS OF CRACK FACE SLIDING DISPLACEMENT (CSD) FOR INPLANE ELASTIC CONSTANTS OF SYMMETRIC DAMAGED LAMINATES - Mohamed Sahbi Loukil, Janis Varna (Rise SICOMP, Linköping University, Luleå University of Technology)

10:10-10:30 164 MICRO-DAMAGE ANALYSIS IN THIN-PLY LAMINATES FOR CRYOGENIC APPLICATIONS - Andrejs Pupurs, Mohamed Sahbi Loukil, David Mattsson (Luleå University of Techology, Rise SICOMP)

10:30-11:00 Coffee break11:00-12:40 Oral session “Intralaminar Cracking - 2”

chaired by A. Pupurs and M. Loukil

11:00-11:20 120 CRACK MIGRATION: EXPERIMENTS AND NUMERICAL MODELLING ON ANGLEPLY LAMINATES - Miguel Herráez, Georgios Pappas, Charlie Blon-deau, John Botsis (EPFL)

11:20-11:40 136 TRANSVERSE CRACKING IN THIN PLY-COMPOSITES: MESOSCALE MODELLING AND ACCURATE PREDICTIONS - Sébastien Kohler, Joël Cugnoni, John Botsis (EPFL)

11:40-12:00 141 X-RAY CT IMAGING AND MODELING OF FLEXURE-INDUCED DAMAGE IN TAPELAMINATES - Brian Wingate, David Mollenhauer, Michael Czabaj (University of UTAH, Air Force Research Laboratory RX Directorate)

12:00-12:20 151 VARIATIONAL MODEL FOR PLY CRACKING IN MULTIPLE ORIENTATIONS IN GENERAL SYMMETRIC COMPOSITE LAMINATES WITH FULL HOMOGENIZATION OF DAMAGED INPLANE AND OUT-OF-PLANE PLY PROPERTIES - M. Hajikazemi, I. Miskdjian, D. Garoz, W. Van Paepegem (Ghent University)

12:20-12:40 130 MULTISCALE MODELLING OF A THICK CARBON FIBRE SHEET MOULD-ING COMPOUND AUTOMOTIVE COMPONENT: FROM MANUFACTURING TO STRUCTURAL SIMULATION - Luca M. Martulli, Marco Alves, Martin Kerschbaum, Soraia Pimenta, Stepan V. Lomov, Yentl Swolfs (Toyota Motor Europe, KU Leuven)

12:40-13:40 Lunch

6

Time Nr. May 27th

13:40-15:20 Oral session “Delaminations - 1” chaired by E. Jarve and M. Wisnom

13:40-14:00 102 IMPROVING DELAMINATION FRACTURE TOUGHNESS IN MULTI- DIRECTIONAL LAMINATES USING INTERLOCKED THIN-PLY REINFORCEMENTS - John-Alan Pascoe, Soraia Pimenta, Silvestre T. Pinho (Imperial College London)

14:00-14:20 134 AN ELEMENT TEST SPECIMEN WITH PLY DROPS TO STUDY FATIGUE CRACK GROWTH RATES AT GEOMETRY TRANSITIONS - Stergios Goutiano, Bent F. Sørensen (Technical University of Denmark)

14:20-14:40 121 AN EXPERIMENTAL PROCEDURE TO CHARACTERIZE ADHESIVE JOINTS LOADED IN SHEAR - Ainhoa Arrese, Faustino Mujika, Carlos Sarrado, Jordi Renart (UPV/EHU, University of Girona)

14:40-15:00 122 NUMERICAL METHODS FOR TEMPERATURE CHARACTERISATION OF CFRP INTERFACE BEHAVIOUR USING CURRENT INSERTION TESTS - Juan P. Márquez Costa, Cédric Huchette, Damien Halm (ONERA, DPMM)

15:00-15:20 124 AN EFFICIENT METHOD TO OBTAIN THE COHESIVE LAWS OF BONDED JOINTS IN MODE I AND MODE II FRACTURE TESTS - S. Abdel Monsef, J. Renart, A. Turon, P. Maimí (University of Girona, Zagazig University)

15:20-15:50 Coffee break

15:50-17:30 Oral session “Delaminations - 2” chaired by J. Costa and D. Mollenhauer

15:50-16:10 123 INVESTIGATION ON MODE I CRACK PROPAGATION AND MORPHOLOGY OF ANTISYMMETRIC CFRP LAMINATES - Charlie Blondeau, Georgios Pappas, Miguel Herráez, John Botsis (EPFL)

16:10-16:30 126 GROWTH DRIVING DIRECTION CRITERION AND ITS APPLICATIONS FOR DELAMINATIONS WITH LARGE-SCALE DAMAGE PROCESS ZONES - Brian L. V. Bak, Laura Carreras, Jordi Renart, Esben Lindgaard, Albert Turon (Aalborg University, University of Girona)

16:30-16:50 108 ANALYSIS OF FATIGUE-DRIVEN DELAMINATION UNDER GENERAL LOADING - Laura Carreras, Jordi Renart, Brian L. V. Bak, Esben Lindgaard, Albert Turon (Aalborg University, University of Girona)

16:50-17:10 128 GEOMETRICALLY NONLINEAR REGULARIZED EXTENDED FINITE ELE-MENT ANALYSIS OF BUCKLING OF COMPOSITES - Jeffrey S. McQuien, Endel V. Iarve, David H. Mollenhauer (University of Texas at Arlington, AFRL/RX)

17:10-17:30 152 MODE II FRACTURE ANALYSIS OF ANTISYMMETRIC LAMINATES BASED ON THE 4ENF SETUP AND J-INTEGRAL - Niels Pichler, Charlie Blondeau, Georgios Pappas, Miguel Herráez, John Botsis (EPFL)

17:30-18:00 Break

18:00-20:00 Welcome reception

7

Time Nr. May 28th

8:30-9:15

Keynote lecture chaired by J. Varna

202 Testing and modelling of NCF and thin ply composites during impact, crash and triaxial loading - Robin Olsson (Rise SICOMP)

9:15-10:35 Oral Session “Strain rate and energy absorption - 1” chaired by Y. Swolfs and M. Quaresimin

9:15-9:35 103 BEARING FATIGUE LIFETIME AND CAI CAPABILITY OF FIBRE METAL LAMINATES - B. Fiedler, R. Adelung, M. Baytekin-Gerngross, E. Sprecher, J. Wegner, M.-D. Gerngross, J. Carstensen, B. Bosbach (Hamburg University of Technology, Kiel University)

9:35-9:55 104 OFF-AXIS IBUS TEST FOR HIGH STRAIN RATE TESTING OF UD COMPOSITES - Xavier Régal, Fabrice Pierron (University of Southhampton)

9:55-10:15 114 FRICTION TESTS FOR SIMULATION OF ENERGY ABSORBING COMPOSITE STRUCTURES - Thomas Bru, Robin Olsson (Rise SICOMP)

10:15-10:35 115 HIGH STRAIN RATE MICROMECHANICAL TESTING OF COMPOSITE MATERIALS - Mario Rueda-Ruiz, Ben D. Beake and Jon M. Molina- Aldareguia (IMDEA Materails Institute, Universidad Politecnica de Madrid)

10:35-11:10 Coffee break

11:10-12:30 Oral session “Strain rate and energy absorption - 2” chaired by R. Olsson and B. Fiedler

11:10-11:30 116 CHARACTERISATION OF BEARING ENERGY ABSORPTION OF THIN-PLY BASED DISCONTINUOUS COMPOSITE - Sachin Francis, Christopher Cameron, Leif E. Asp, Maciej Wysocki (Rise SICOMP, Chalmers University if Technology, RISE)

11:30-11:50 119 REALISING IMPACT DAMAGE TOLERANT BOULIGAND AND HERRING-BONE/BOULIGAND THIN-PLY CFRP STRUCTURES - Lorenzo Mencattelli, Silvestre T. Pinho (Imperial College London)

11:50-12:10 129 INFLUENCE OF TEMPERATURE AND IMPACT ENERGY ON LOW- VELOCITY IMPACT DAMAGE AND RESIDUAL COMPRESSIVE STRENGTH OF CFRP - Johann Körbelin, Bodo Fiedler (Hamburg University of Technology)

12:10-12:30 137 IMPROVING THE WEAK IMPACT RESISTANCE AND TOLERANCE OF THIN PLY BASED THIN LAMINATES USING NOVEL UNSYMMETRICAL LAMINATE DESIGN - Aravind Sasikumar, Josep Costa, Daniel Trias, Peter Linde (University of Girona, Airbus, Chalmers University of Technology)

12:30-13:30 Lunch

8

Time Nr. May 28th

13:30-14:30 Mini oral sessiom chaired by R. Joffe

105 MECHANICAL AND FUNCTIONAL CHARACTERISATION OF FLAX / RECYCLED CARBON FIBRE HYBRID COMPOSITES - Marco L. Longana, Vaclav Ondra, Ian Hamerton (University of Bristol)

110 MICROMECHANICAL MODEL OF CROSS-OVER FIBER BRIDGING - Frode Grytten, Bent F. Sørensen, Stergios Goutianos, Reidar K. Joki, Jens K. Jørgensen (SINTEF Industry, Technical University of Denmark)

111 DEVELOPMENT AND FINITE ELEMENTS ASSESSMENT OF STACKING SEQUENCES FOR INTERLAMINAR FRACTURE TOUGHNESS TESTING OF ANGLE-PLY INTERFACES - Torquato Garulli, Anita Catapano, Daniele Fanteria, Julien Jumel (University of Bordeaux, University of Pisa)

112 A NOVEL TEST METHOD FOR THE INVESTIGATION OF THE COMBINED INFLUENCE OF THROUGH-THICKNESS COMPRESSION AND SHEAR STRESSES ON THE LONGITUDINAL FIBRE TENSILE STRENGTH OF CARBON FIBRE REINFORCED POLYMERS - Kilian Gruebler, Stephen R. Hallett, Michael R. Wisnom (University of Bristol)

113 AN INTEGRATED MACHINE LEARNING AND FINITE ELEMENT ANALYSIS FRAMEWORK, APPLIED TO COMPOSITE SUBSTRUCTURES INCLUDING DAMAGE - Tom Gulikers, Boyang Chen (TU Delft)

118 Deformation Rate Effects on Tensile Properties of NaOH Treated Ramie Fiber/PLA/PBAT Composites - Masahiro Nishida, Shigeru Bito, Hiroaki Ito, Norio Fukuda (Nagoya Institute of Technology, Aichi Center for Industry and Science Technology)

131 STUDY OF INFLUENCE OF MODIFY MANUFACTURING PARAMETERS ON DELAMINATION PROPERTIES IN A UNDIRECTIONAL GLASS FIBER/EPOXY RESIN COMPOSITE - Luis Torres, Victor Tuninetti, Paulo Flores, Gonzalo Pincheira (University of Talca, UFRO, UDEC)

132 THE TRANSLAMINAR FRACTURE TOUGHNESS OF HIGH- PERFORMANCE POLYMER FIBRE COMPOSITES AND THEIR CARBON FIBRE HYBRIDS - Yoran Geboes, Amalia Katalagarianakis, Jan Ivens, Yentl Swolfs (KU Leuven)

135 THE EFFECT OF STEAM EXPLODED FIBRES ON THE MECHANICAL PERFORMANCE OF POLYMER COMPOSITE - Pooria Khalili, Brina Blinzler, Roland Kádár (Chalmers university of Technology)

142 POLYETHER SULFONE INTERLEAVED GLASS/CARBON HYBRID COMPOSITE UNDER IMPACT LOADING - Sakineh Fotouhi, Joseph Clamp, Amir Bolouri, Mohamad Fotouhi (University of Tabriz, University of West England)

153 MODEL OF ELASTICITY OF A LAMINATED COMPOSITE WITH ANISOTROPIC HETEROMODULAR LAYERS - Alexander I. Oleinikov, Tatyana A. Kuzmina (Central Aerohydrodynamic Institute, Moscow Institute of Physics and Technology)

161 A REVIEW OF STRATEGIES FOR LOWERING STRESS CONCENTRATIONS DURING TENSILE TESTING OF COMPOSITE MATERIALS - Babak Fazlali, Stepan V. Lomov, Yentl Swolfs (KU Leuven)

162 EXPERIMENTAL INVESTIGATION OF DAMAGE FORMATION IN THIN-PLY COMPOSITES - Konstantinos Giannadakis, Mohamed Loukil, Florence Rinn (Rise SICOMP, Oxeon)

9

Time Nr. May 28th

163 TIME-DEPENDENT PROPERTIES OF GRAPHENE REINFORCED HDPE - Zainab Al-Maqdasi, Liva Pupure, Nazanin Emami, Roberts Joffe (Luleå University of Technology)

166 STRESSES IN DOUBLE-LAP ADHESIVE JOINT ANALYSED BY USE OF NUMERICAL MODEL WITH SPECIAL BOUNDARY CONDITIONS AND MATERIAL NON-LINEARITY - Nawres J. Al-Ramahi, Roberts Joffe, Janis Varna (LTU, Middle Technical University)

167 EFFECT OF LOCAL DELAMINATIONS ON THE IN-PLANE STIFFNESS OF CROSS-PLY LAMINATES - H. Ben Kahla, J. Varna (Luleå University of Tehcnology)

14:30-16:10 Coffee break and poster session

16:10-17:30 Oral session “Phenomena in complex loading - 1” chaired by P.A. Carraro and F. Laurin

16:10-16:30 117 NONDESTRUCTIVE CHARACTERIZATION OF DAMAGE IN POLYMER MATRIX COMPOSITES FOR ENHANCED LIFE MANAGEMENT - Eric A. Lindgren, John Aldrin, John Wertz, Norm Schehl, John Welter, David Zainey, Victoria Kramb, Michael Uchic, Sarah Wallentine (US Air Force Research Laboratory, Computational Tools)

16:30-16:50 133 FIBRE BREAKS IN INTERLAYER HYBRID COMPOSITES DETECTED WITH IN-SITU SYNCHROTRON COMPUTED TOMOGRAPHY AND SIMULATED WITH A FIBRE BREAK MODEL - Francisco Mesquita, Christian Breite, Yentl Swolfs, Stepan V. Lomov, Larissa Gorbatikh (KU Leuven)

16:50-17:10 140 IMPROVING THE ARCAN SPECIMEN FOR COMBINED TENSION/ COMPRESSION AND SHEAR TESTING OF FIBRE REINFORCED COMPOSITES - Tobias Laux, Khong Wui Gan, Janice M. Dulieu-Barton, Ole T. Thomsen (University of Southamptons)

17:10-17:30 159 REAL-TIME DIGITAL IMAGE CORRELATION APPLICATIONS TO COMPOSITE MECHANICAL TESTING - Victor Couty, Eric Deletombe, Julien Berthe, Jean-François Witz, Pauline Lecomte-Grosbras, Mathias Brieu (Univ. Lille, ONERA, California state University)

17:30-19:00 Break

19:00 Conference Dinner

10

Time Nr. May 29th

8:30-9:15

Keynote lecture chaired by L. Pupure

203 Unconventional Experimental Approaches to Investigate the Compressive Behaviour of Carbon Fibre Composites - Michael Wisnom (University of Bristol)

9:15-9:55 Oral session “Phenomena in complex loading - 2” chaired by F. Pierron and J. Renart

9:15-9:35 143 ON THE IN-SITU EFFECT UNDER TRANSVERSE SHEAR AND THE A SSOCIATED THINPLY LAMINATE IMPACT RESPONSE - S.M. García-Rodríguez, J. Costa, V. Singery, A. Sasikumar (University of Girona)

9:35-9:55 148 SPLIT-DISK TEST WITH 3D DIGITAL IMAGE CORRELATION STRAIN MEASUREMENT FOR FILAMENT WOUND COMPOSITES - Yinglun Zhao, Pavel Druzhinin, Kirill Ilin, Jan Ivens, Dirk Vandepitte, Stepan V. Lomov (KU Leuven, SIM vzw)

9:55-10:20 Coffee break

10:20-12:20 Oral session “Micromechanics” chaired by J. Varna and A. Pupurs

10:20-10:40 150 SYNERGIES IN THE FINAL FAILURE OF THIN PLY COMPOSITES: NEW MODELLING INSIGHTS TO EXPLAIN THE EXPERIMENTAL OBSERVATIONS - Yentl Swolfs (KU Leuven)

10:40-11:00 158 MATRIX AND INTERFACE CRACKING IN CROSS-PLIED MULTIFUNCTIONAL STRUCTURAL COMPOSITE MICRO-BATTERY - J. Xu (Chalmers University of Technology )

11:00-11:20 146 FIBRE-RELATED DAMAGE EVOLUTION IN UNIDIRECTIONAL PLIES UNDER CYCLIC TENSION LOADINGS - Paolo A. Carraro, Lucio Maragoni, Oscar Castro, Marino Quaresimin (University of Padova)

11:20-11:40 149 NUMERICAL STUDY ON EFFECT OF FIBRE MISALIGNMENT AND VARIATION OF COHESIVE PROPERTIES ON FIBRE/MATRIX DEBONDING - Pavel Druzhinin, Qiang Liu, Stepan V. Lomov, Dirk Vandepitte (KU Leuven)

11:40-12:00 138 ELIMINATION OF VOLUME REDUNDANCY IN EMBEDDED ELEMENTS/COHESIVE ZONES MODELLING OF INTERFACE AND MATRIX DAMAGE MODELLING IN FIBRE REINFORCED COMPOSITES - Fangzhou Lu, Pavel Druzhinin, Qiang Liu, Dirk Vandepitte, Larissa Gorbatikh, Stepan V. Lomov (Nanjing University of Aeronautics and Astronautics, KU Leuven)

12:00-12:20 160 PLY-THICKNESS EFFECT ON FIBER-MATRIX INTERFACE CRACK GROWTH - Luca Di Stasio, Janis Varna and Zoubir Ayadi (LuleåUniversity of Technology, University of Lorraine)

12:20-13:20 Lunch

11

Time Nr. May 29th

13:20-14:20 Oral session “Proccesing induced behaviour” chaired by L.P. Mikkelsen and F. Mujika

13:20-13:40 109 PREDICTION AND EXPERIMENTAL VALIDATION OF THE NOTCH (IN)SENSITIVITY OF TOW BASED DISCONTINUOUS COMPOSITES - Marco Alves, Soraia Pimenta, Yizhuo Li, Tahreem Naveed, Florian Gaudron (Imperial College London)

13:40-14:00 154 A PHYSICALLY BASED APPROACH DEDICATED TO OPEN-HOLE STRENGTH WITH A NEW GENERATION MATERIAL - J. Germain, J. Rannou, F. Laurin, F. Congourdeau (ONERA/DMAS, Dassault Aviation)

14:00-14:20 106 DEVELOPMENT OF A NEW HYBRID COMPOSITE PEDICLE SCREW: NUMERICAL AND EXPERIMENTAL INVESTIGATION - Yves N. Becker, Nicole Motsch, Joachim Hausmann (Institut für Verbundwerkstoffe GmbH)

14:20-15:00 Oral session “Stress gradients chaired by L.P. Mikkelsen and F. Mujika

14:20-14:40 139 ON OPTICAL FIBER BRAGG GRATINGS FOR IN-SITU CURE-INDUCED STRAIN MEASUREMENTS - Lars P. Mikkelsen, Jonas Huether, Gilmar Pereira, Hans Lilholt (DTU Wind Energy, Karlsruhe Institute of Technology)

14:40-15:00 165 EFFECT OF DEGREE OF CURE ON NON-LINEAR BEHAVIOUR OF POLYMERIC MATERIALS - Liva Pupure, Sibin Saseendran, Janis Varna (Luleå University of Technology, Rise SICOMP)

15:00-15:30 Announcment of award winners and goodbye

15:30-16:00 Goodbye coffee break

12