JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 27

Design More information compoScience is a German engineering service provider that specialises in the calculation and design of composite components for the mechanical engineering and automotive engineering sectors. Its portfolio of services for fibre-reinforced composite components includes stiffness, strength and delamination-process calculations and the simulation of composite failure properties. Working through strong partnerships enables compoScience to add the measurement of static and dynamic material parameters to its proposed services. the tool was checked. Any necessary adjustments were then transferred back to the simulation model. Fig. 2: Plot showing the main stresses at the transition between the spoke and the rim bed. Efforts in the rim were calculated based on the action plane criterion according to Schürmann/Puck. This criterion not only has high prediction accuracy, it also serves to distinguish failure modes in fibre failure and inter-fibre failure. Hence, laminate analysis according to Schürmann/Puck shows: the magnitude of the loads acting on the component; which laminate layer is exposed to the highest loads; and which stresses actually lead to layer failure. This way, degradation analysis – i.e. investigating the reduced load-carrying capability of the laminate following inter-fibre failure – is also possible. The multitude of data available allows a more effective optimization of the laminate structure (Fig. 3). The non-linear behaviour of a material is rarely taken into consideration in the design of fibrereinforced composite components. The shear stress/strain behaviour of composites, however, is significantly non-linear. Fig. 3: Inter-fibre failure plot of the rim under maximum side and vertical load. Fig. 4: Finished CFRP rim. Construction and testing Taking these effects into consideration enables optimum rating of components in terms of weight saving. On the other hand, the non-linear behaviour of materials may affect the failure behaviour of individual layers and, therefore, of the component as a whole. Consequently, the increased time and cost required to measure the shear stress/strain curve appear justified. Using only a few iteration steps, the above procedure made it possible to define a laminate structure that was already very close to a weight-optimized design. The rim lay-up is influenced both by the loads acting on the component and the drapability of the prepreg cuttings. To facilitate applying the calculated laminate structure to the tool, all required cuttings (186 in total) were first derived from the CAD files and their drapability on Once the lay-up was determined and refined in several stages, it took only a few weeks and the support of their manufacturing partners for the members of the TU-DART Racing Team to manufacture several rims. The result is impressive: weighing under 1,700 g, the rim is nearly 45% lighter than the aluminium rims used so far, and comparably stiff. Given the positive results from physical tests on a test rig, the new rim is expected to make a major contribution towards the TU-DART team’s longhoped-for success in the racing series (Fig. 4). More information: www.composcience.de www.dart-racing.de No45 November-December 2008 / jec composites magazine
http://www.composcience.de http://www.dart-racing.de

JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008

Cover
Editorial
Market Place
Advertisers
CONTENTS
NEWS WORLDWIDE
- Companies
 - Innovations
 - Agenda of events
 - Innovations
BUSINESS
 - Market survey
 - Trends: Productivity
 - Human Capital: Designer
FEATURE - AUTOMOTIVE
 - Design
 - Raw material
 - Thermoplastics
 - Prepreg
 - Structural materials
 - Foam materials
 - Induction
 - Software
- Lighting
USERS' PLATFORM
 - Composites in the world
 - Successful partners
- Applications
KNOW-HOW
 - Biopolymer
 - Processing
 - Modelling
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - Cover
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 2
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - Editorial
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - Market Place
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - Advertisers
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - CONTENTS
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 7
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - - Companies
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 9
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Innovations
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 11
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 12
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 13
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 14
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 15
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 17
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Innovations
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 19
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 20
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - BUSINESS
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Market survey
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Trends: Productivity
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Human Capital: Designer
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - FEATURE - AUTOMOTIVE
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Design
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 27
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Raw material
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 29
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 30
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 31
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Thermoplastics
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 33
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 34
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 35
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 36
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 37
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 38
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 39
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 40
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Prepreg
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 42
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 43
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Structural materials
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 45
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Foam materials
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 47
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 48
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 49
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Induction
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 51
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Software
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 53
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - - Lighting
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 55
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 56
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - USERS' PLATFORM
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Composites in the world
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 59
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Successful partners
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 61
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - - Applications
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 63
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 64
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - KNOW-HOW
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Biopolymer
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 67
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 68
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 69
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Processing
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 71
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 72
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 -  - Modelling
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 74
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 75
JEC COMPOSITES MAGAZINE - Issue #45 - November/December 2008 - 76
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