JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 43

Assembling

More information
Capaero developed the EB² process and backed the project and patent process. The company is a partner of West Coast Industries Europe (WCIE), the European leader in cold working techniques to improve the fatigue performance of aeronautical structures. WCIE develops specific processes and tooling for both composite materials and metals. strength – through better load transfer. Comparing the performance of EB² assemblies in both the uniaxial tensile tests and the tearing tests with that of adhesive-bonded assemblies shows that EB² improves performance even more (see Fig. 3).
Fig. 1: Implementing the EB² process

A structural bonding method by microencapsulation is used in conjunction with the expansion process. A mandrel exerts a pressure on the layer of microcapsules between the metal bushing and the composite part, squeezing them until they burst, releasing the hardener and initiating the structural adhesive’s polymerization process (see Fig. 2).

Fig. 3: Mechanical performance of EB²

The efficiency of the process depends on a number of parameters, e.g. the theoretical expansion ratio, which is the % ratio of the mandrel’s maximum diameter and the diameter of the bushing hole before assembly. This expansion ratio is a key parameter in the process, because it influences the assembly efficiency, which must be high enough to allow holding and correctly bonding the metal bushing, but also in an acceptable range that will avoid damaging or preloading the composite.
Fig. 2: Microscopic cross section of the assembly

EB² and mechanical performance
One of the main objectives of the EB² process was to obtain high mechanical performance in order to use it with structural parts. Various tensile and tearing tests were carried out to compare the performance of EB² with that of other assembly processes in use. It has already been established that adhesive bonding a metal bushing to the composite’s attachment hole considerably improves the assembly strength – especially the tensile

Modelling tools and experimental protocols have been developed to allow controlling the process, and specifically to adapt the process parameters to a given set of specifications (see Fig. 4). Numerical simulations not only provide a detailed understanding of the physical phenomena and rupture modes involved, but also give access to such hard-tomeasure data as the state of residual stress following use of the mandrel or the load transfer mechanisms at the bushing/composite interface. To further these objectives, a research grant financed by Capaero, the national research and technological association ANRT and the Aquitaine

No58 June-July 2010 / jec composites magazine

43



JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010

Cover
Editorial
Market Place
Advertisers
Index
Contents
NEWS WORLDWIDE
- Companies
- Innovations
- Agenda of events
BUSINESS
- Market survey
- Trends
- Human Capital
FEATURE - AERONAUTICS
- Market
- Nano
- Simulation
- Fibre placement
- Assembling
- Thermoplastics
USERS' PLATFORM
- Composites in the world
- Successful Partners
- Civil Engineering
KNOW-HOW
- Reinforcement
- RTM
- Induction
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Cover
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 2
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Editorial
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Market Place
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Index
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Contents
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 7
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Companies
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 9
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 10
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Innovations
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - BUSINESS
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Market survey
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 15
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 16
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 17
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Trends
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 19
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Human Capital
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - FEATURE - AERONAUTICS
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Market
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 23
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 24
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 25
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 26
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 27
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Nano
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 29
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Simulation
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 31
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 32
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 33
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 34
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 35
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 36
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 37
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Fibre placement
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 39
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 40
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 41
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Assembling
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 43
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 44
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Thermoplastics
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 46
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 47
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 48
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 49
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 50
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - USERS' PLATFORM
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Composites in the world
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Successful Partners
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Civil Engineering
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 55
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 56
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - KNOW-HOW
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Reinforcement
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 59
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - RTM
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 61
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Induction
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 63
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 64
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 65
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 66
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 67
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 68
https://www.nxtbook.fr/newpress/jeccomposites/jcm2211_148
https://www.nxtbook.fr/newpress/jeccomposites/jcm2209_147
https://www.nxtbook.fr/newpress/jeccomposites/jcm2206_146
https://www.nxtbook.fr/newpress/jeccomposites/jcm2204_145
https://www.nxtbook.fr/newpress/jeccomposites/jcm2201_144
https://www.nxtbook.fr/newpress/jeccomposites/jcm211_143
https://www.nxtbook.fr/newpress/jeccomposites/jcm2109_142
https://www.nxtbook.fr/newpress/jeccomposites/jcm2107_141
https://www.nxtbook.fr/newpress/jeccomposites/jcm2105_140
https://www.nxtbook.fr/newpress/jeccomposites/jcm2103_139
https://www.nxtbook.fr/newpress/jeccomposites/jcm-experts-digest-additive-manufacturing-2020
https://www.nxtbook.fr/newpress/jeccomposites/jcm2101_138
https://www.nxtbook.fr/newpress/jeccomposites/jcm2011_Special_Issue4
https://www.nxtbook.fr/newpress/jeccomposites/jcm2011_137
https://www.nxtbook.fr/newpress/jeccomposites/jcm2009_136
https://www.nxtbook.fr/newpress/jeccomposites/jcm2007_135
https://www.nxtbook.fr/newpress/jeccomposites/jcm_2020_Q1_Innovation_Report
https://www.nxtbook.fr/newpress/jeccomposites/jcm2005_Special_Issue3
https://www.nxtbook.fr/newpress/jeccomposites/jcm2005_134
https://www.nxtbook.fr/newpress/jeccomposites/jcm2003_133
https://www.nxtbook.fr/newpress/jeccomposites/jcm2001_132
https://www.nxtbook.fr/newpress/jeccomposites/jcm1911_Special_Issue2
https://www.nxtbook.fr/newpress/jeccomposites/jcm1911_131
https://www.nxtbook.fr/newpress/jeccomposites/jcm1909_130
https://www.nxtbook.fr/newpress/jeccomposites/jcm1907_129
https://www.nxtbook.fr/newpress/jeccomposites/jcm1905_128
https://www.nxtbook.fr/newpress/jeccomposites/jcm1903_Special_Issue1
https://www.nxtbook.fr/newpress/jeccomposites/jcm1903_127
https://www.nxtbook.fr/newpress/jeccomposites/jcm1901_126
https://www.nxtbook.fr/newpress/jeccomposites/jcm1811_125
https://www.nxtbook.fr/newpress/jeccomposites/jcm1810_124
https://www.nxtbook.fr/newpress/jeccomposites/jcm1808_123
https://www.nxtbook.fr/newpress/jeccomposites/jcm1807_122
https://www.nxtbook.fr/newpress/jeccomposites/jcm1805_121
https://www.nxtbook.fr/newpress/jeccomposites/jcm1804_120
https://www.nxtbook.fr/newpress/jeccomposites/jcm1803_119
https://www.nxtbook.fr/newpress/jeccomposites/jcm1802_119-Supplement_Innovation_Report
https://www.nxtbook.fr/newpress/jeccomposites/jcm1801_118
https://www.nxtbook.fr/newpress/jeccomposites/jcm1711_117
https://www.nxtbook.fr/newpress/jeccomposites/jcm1710_116
https://www.nxtbook.fr/newpress/jeccomposites/jcm1708_115
https://www.nxtbook.fr/newpress/jeccomposites/jcm1707_114
https://www.nxtbook.fr/newpress/jeccomposites/jcm1706_113
https://www.nxtbook.fr/newpress/jeccomposites/jcm1704_112
https://www.nxtbook.fr/newpress/jeccomposites/jcm1703_111
https://www.nxtbook.fr/newpress/jeccomposites/jcm1701_110
https://www.nxtbook.fr/newpress/jeccomposites/jcm1611_109
https://www.nxtbook.fr/newpress/jeccomposites/jcm1610_108
https://www.nxtbook.fr/newpress/jeccomposites/jcm1608_107
https://www.nxtbook.fr/newpress/jeccomposites/jcm1607_106
https://www.nxtbook.fr/newpress/jeccomposites/jcm1605_105
https://www.nxtbook.fr/newpress/jeccomposites/jcm1604_104
https://www.nxtbook.fr/newpress/jeccomposites/jcm1603_103
https://www.nxtbook.fr/newpress/jeccomposites/jcm1601_102
https://www.nxtbook.fr/newpress/jeccomposites/jcm1511_101
https://www.nxtbook.fr/newpress/jeccomposites/jcm1510_100
https://www.nxtbook.fr/newpress/jeccomposites/jcm1509_99
https://www.nxtbook.fr/newpress/jeccomposites/jcm1507_98
https://www.nxtbook.fr/newpress/jeccomposites/jcm1505_97
https://www.nxtbook.fr/newpress/jeccomposites/jcm1504_96
https://www.nxtbook.com/newpress/jeccomposites/jcm1503_95
https://www.nxtbook.com/newpress/jeccomposites/jcm1501_94
https://www.nxtbook.com/newpress/jeccomposites/jcm1412_93
https://www.nxtbook.com/newpress/jeccomposites/jcm1410_92
https://www.nxtbook.com/newpress/jeccomposites/jcm1409_91
https://www.nxtbook.com/newpress/jeccomposites/jcm1406_90
https://www.nxtbook.com/newpress/jeccomposites/jcm1405_89
https://www.nxtbook.com/newpress/jeccomposites/jcm1404_88
https://www.nxtbook.com/newpress/jeccomposites/jcm1403_87
https://www.nxtbook.com/newpress/jeccomposites/jcm1401_86
https://www.nxtbook.com/newpress/jeccomposites/jcm1311_85
https://www.nxtbook.com/newpress/jeccomposites/jcm1310_84
https://www.nxtbook.com/newpress/jeccomposites/jcm1308_83
https://www.nxtbook.com/newpress/jeccomposites/jcm1307_82
https://www.nxtbook.com/newpress/jeccomposites/jcm1305_81
https://www.nxtbook.com/newpress/jeccomposites/jcm1304_80
https://www.nxtbook.com/newpress/jeccomposites/jcm1303_79
https://www.nxtbook.com/newpress/jeccomposites/jcm1301_78
https://www.nxtbook.com/newpress/jeccomposites/jcm1212_77
https://www.nxtbook.com/newpress/jeccomposites/jcm1210_76
https://www.nxtbook.com/newpress/jeccomposites/jcm1208_75
https://www.nxtbook.com/newpress/jeccomposites/jcm1207_74
https://www.nxtbook.com/newpress/jeccomposites/jcm1206_73
https://www.nxtbook.com/newpress/jeccomposites/jcm1204_72
https://www.nxtbook.com/newpress/jeccomposites/jcm1203_71
https://www.nxtbook.com/newpress/jeccomposites/jcm1201_70
https://www.nxtbook.com/newpress/jeccomposites/jcm1111_69
https://www.nxtbook.com/newpress/jeccomposites/jcm1110_68
https://www.nxtbook.com/newpress/jeccomposites/jcm1108_67
https://www.nxtbook.com/newpress/jeccomposites/jcm1107_66
https://www.nxtbook.com/newpress/jeccomposites/jcm1105_65
https://www.nxtbook.com/newpress/jeccomposites/jcm1104_64
https://www.nxtbook.com/newpress/jeccomposites/jcm1103_63
https://www.nxtbook.com/newpress/jeccomposites/jcm1101_62
https://www.nxtbook.com/newpress/jeccomposites/jcm1011_61
https://www.nxtbook.com/newpress/jeccomposites/jcm1010_60
https://www.nxtbook.com/newpress/jeccomposites/jcm1009_59
https://www.nxtbook.com/newpress/jeccomposites/jcm1006_58
https://www.nxtbook.com/newpress/jeccomposites/jcm1005_57
https://www.nxtbook.com/newpress/jeccomposites/jcm1004_56
https://www.nxtbook.com/newpress/jeccomposites/jcm1003_55
https://www.nxtbook.com/newpress/jeccomposites/jcm1001_54
https://www.nxtbook.com/newpress/jeccomposites/jcm0911_53
https://www.nxtbook.com/newpress/jeccomposites/jcm0910_52
https://www.nxtbook.com/newpress/jeccomposites/jcm0909_51
https://www.nxtbook.com/newpress/jeccomposites/jcm0907-08_50
https://www.nxtbook.com/newpress/jeccomposites/jcm0906_49
https://www.nxtbook.com/newpress/jeccomposites/jcm0904_48
https://www.nxtbook.com/newpress/jeccomposites/jcm0903_47
https://www.nxtbook.com/newpress/jeccomposites/jcm0901_46
https://www.nxtbook.com/newpress/jeccomposites/jcm0811_45
https://www.nxtbook.com/newpress/jeccomposites/jcm0810_44
https://www.nxtbook.com/newpress/jeccomposites/jcm0809_43
https://www.nxtbook.com/newpress/jeccomposites/jcm0807_42
https://www.nxtbook.com/newpress/jeccomposites/jcm0806_41
https://www.nxtbook.com/newpress/jeccomposites/jcm0805_40
https://www.nxtbook.com/newpress/jeccomposites/jcm0803_39
https://www.nxtbook.com/newpress/jeccomposites/jcm0801_38
https://www.nxtbook.com/newpress/jeccomposites/jcm0712_37
https://www.nxtbook.com/newpress/jeccomposites/jcm0710_36
https://www.nxtbook.com/newpress/jeccomposites/jcm0709_35
https://www.nxtbook.com/newpress/jeccomposites/jcm0707_34
https://www.nxtbook.com/newpress/jeccomposites/jcm0706_33
https://www.nxtbookmedia.com