JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 61
40 years of research in the mechanics of composite materials and structures in Cachan
Fig. 2: The interior of the ASTREE tri-axial testing machine
Safran groups. More recently, new relations were developed
with the automotive industry through the Compinnov joint
lab (ENS Paris-Saclay, Ecole Centre de Nantes, CETIM),
whose aim is to investigate the use of thermoplastic composites in low-cost, high-production-rate applications. LMT's
main contributions to the solid mechanics community focus
primarily on damage mechanics, multi-axial testing, fullfield measurement and computational mechanics.
From damage modeling to computational mechanics
Damage mechanics aims at describing the degradation of a
material as a reduction of its elastic stiffness. This macroscopic description can account for many different microscopic phenomena, such as the development of multiple
subcritical cracks in a cross-ply carbon epoxy laminate. The
mesomodel developed in Cachan at the end of the 1980s is
based on damage mechanics. Since then, the model has been
improved to account for the different degradation mechanisms occurring in a CFRP material, implemented in indus-
Fig. 4: The future building of the ENS Paris-Saclay
trial codes and, of course, applied and validated in a variety
of representative test cases.
In the damage mesomodel, a laminate composite is broken
down into two intrinsic entities: the ply and the interface
between plies. The role of the ply entity is to study fibre
cracking, matrix transverse cracking, diffuse fibre/matrix
debonding and fibre kinking, while the role of the interface
is to describe the initiation and propagation of delamination
between plies. The mesomodel is homogeneous at the ply
scale but not at the laminate scale, so that it is numerically
expensive and it leads to the development of high-performance numerical strategies based on domain decomposition and adapted non-linear solvers. In the 2000s, a bridge
has been set up between the discrete description of cracks
and the continuous damage variables, increasing the confidence of industrial partners in the physical foundations of
the model. Note that composite materials (CFRP and CMC)
have been a very interesting playing field for developing an-
Fig. 3: R. Naylor (2017). Comparison between DIC measurements and strain field simulations at the fibre scale
No113 June 2017
/ jec composites magazine
61
Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #113 - June 2017
Cover
Edito
Opinion: High temperature composites
Contents
NEWS
In brief
Strategy
Agenda
BUSINESS
Recycling
Second life
Thermoset resin - Part A
MANUFACTURING
Mass production
Design-to-cost
Feature Construction - The future of building
Editorial
JEC Innovation Awards Programme
International JEC Conferences: knowledge and networking
Education
Education
Domes
Sustainable development
Facade
Interior
Safety
Biocomposites
SOLUTIONS
Marine
Automotive
Aircraft
In the world
TECHNOLOGY
Mecanics
Simulation
Technical textile
Repair
Index
Advertisers
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 76
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Cover
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 2
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Edito
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Opinion: High temperature composites
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 5
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Contents
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 7
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - In brief
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 9
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 10
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Strategy
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 12
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 13
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Agenda
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 15
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Recycling
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Second life
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 18
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Thermoset resin - Part A
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 20
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Mass production
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 22
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 23
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Design-to-cost
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 25
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 26
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 27
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Editorial
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - JEC Innovation Awards Programme
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 30
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 31
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - International JEC Conferences: knowledge and networking
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 33
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 34
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 35
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Education
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 37
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Education
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Domes
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 40
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 41
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Sustainable development
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 43
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Facade
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 45
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Interior
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 47
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 48
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Safety
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 50
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Biocomposites
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 52
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Marine
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 54
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Automotive
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Aircraft
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 57
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - In the world
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 59
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Mecanics
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 61
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 62
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Simulation
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 64
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 65
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 66
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Technical textile
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 68
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 69
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Repair
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 71
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 72
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 73
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - Advertisers
JEC COMPOSITES MAGAZINE - Issue #113 - June 2017 - 75
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