JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 63

Fig. 3: Quickstep QS20 machine showing tank arrangement material from the same batch, and mechanical properties equal or better to the baseline process, which had the benefit of many years of experience with this material. In a separate study with the same resin, using a unidirectional tape material, the glass transition temperature increased by 30ºC using Quickstep processing versus autoclave. While this would typically indicate a higher degree of cross-linking and, therefore, resin embrittlement, testing of the G1c fracture toughness by the double cantilever beam (DCB) method yielded significantly higher values for the Quickstep processed material [2]. A study undertaken by Kaiser et. al [3] shows that the panels made from Hexcel epoxy carbon-fibre prepreg material HexPly M18/1 with a resin content of 43% and a bidirectional [0°/90°], 4-harness satin-weave fabric G939 can be effectively cured using Quickstep technology. With this process, a time saving of 43% compared to the conventional autoclave cure cycle was observed. The monolithic panels manufactured in the autoclave and Quickstep processes provided similar values for the degree of cure and mechanical properties. Control of exothermic reactions Many of the resin systems have a danger of exothermic reaction due to accumulation of heat inside the laminate. This phenomenon is observed mostly in thicker laminates. The Quickstep process does not stop the resin from reacting exothermically; however, it does have a capacity to remove the heat generated by the reaction, by effectively transferring it into the HTF The HTF that moments . earlier had brought the resins to curing temperature, now acts as a massive heat sink with enormous thermal mass in comparison to the reaction heat generated, thus cooling the part to the temperature of the HTF This exotherm control is sometimes seen as a “blip” in . the temperature trace, where the probe inside the laminate records a rise in temperature above the HTF for a few minutes, then falls back to the HTF temperature as the heat of the reaction is absorbed (figure 5). As there is a layer of HTF 25-50 mm thick present across the part, this temperature can be held constant across the part, regardless of the levels of heat energy liberated from the exothermic reaction in thick or thin sections of the laminate. Fig. 4: Curing chamber for relatively flat components with vertical frame Unlike the consumables (e.g., pressurized nitrogen) in autoclave curing, heat energy can be accumulated efficiently over many hours, stored in the tanks, and used repeatedly for many cure cycles. The pumping and recycling of the HTF to the curing chambers can take place over minutes, thus allowing for rapid heat-up and cool-down of the part. With the high level of available heat energy, the crosslinking takes place rapidly and in a fraction of the time achievable within an autoclave. Industrial and performance advantages Due to the rapid heating and cooling characteristics and faster cure times, cycle times for the Quickstep process are notably shorter for current-generation prepreg materials. Savings of over 50% have been reported for a commonly used 175°C-curing aerospace prepreg, Hexcel 914 [1]. Significant savings are available to industry from reduced scrap rates for interrupted cure cycles, reduced tooling requirements, and increased flexibility in part manufacture. Since a part may be cured when lay-up is completed, the mould can be returned to the lay-up area sooner than is typical of batch processing, and lean manufacturing principles such as “flow processing” can be implemented. One study completed by a U.K. manufacturer on blocker-door production estimated a tooling saving of approximately 82%, due to a combination of reduced tool sets and lower costs of a Quickstep tool compared to an autoclave or oven tool [1]. As a result of such rapid curing, the properties of the final laminate can be somewhat different from those produced in traditional processes, and higher glass transition temperatures and material properties have been demonstrated for some materials. In the same UK study mentioned above, the test panels demonstrated a glass transition temperature 4% higher then the autoclave-cured Fig. 5: Control of exotherm during ramp-up of process temperature Tubular product manufacture For manufacturing tubular products, significantly shorter processing times and lower capital and tooling costs are essential. Current methods of tube manufacture include pultrusion, filament winding, and autoclave or oven-cured mandrel wrapping. The Quickstep process, with its characteristics for developing highquality, low-cost, and lightweight components using faster cure No36 October - November 2007 / JEC Composites Magazine

JEC COMPOSITES MAGAZINE - Issue #36 - October 2007

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #36 - October 2007

- Trends
FEATURE: TRANSPORTATION
- Measurement
Edito
BUSINESS
- Innovations
- Niche markets
- Companies
- Application
- Successful partners
- Composites in the world
CONTENTS
KNOW-HOW
- Process
USERS’ PLATFORM
- Market
- Market survey
NEWS WORLDWIDE
- Prototyping
- Agenda of events
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 1
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 2
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - Edito
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 4
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 5
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - CONTENTS
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 7
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - NEWS WORLDWIDE
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 9
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 10
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 11
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 13
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Innovations
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 15
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 16
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - BUSINESS
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Market survey
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 19
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 20
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 21
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 22
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 23
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 24
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 25
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Trends
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 27
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Niche markets
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - FEATURE: TRANSPORTATION
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Market
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 31
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 32
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 33
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Application
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 35
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 36
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 37
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 38
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 39
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 40
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 41
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 42
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 43
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 44
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 45
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 46
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 47
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 48
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - USERS’ PLATFORM
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Composites in the world
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 51
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Successful partners
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 53
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 54
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 55
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 56
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - KNOW-HOW
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Prototyping
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 59
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 60
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 61
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Process
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 63
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 64
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - - Measurement
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 66
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 67
JEC COMPOSITES MAGAZINE - Issue #36 - October 2007 - 68
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