JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 99
Optimized fibre placement for composites
Function to create Choice of process Choice of shape
The builders of cathedrals probably didn’t even know that the stones and mortar they were using were composite materials: two materials with different properties, stone being the basic element and the mortar, the binder. During the Roman period, and even into the Gothic, they did without rebar, concrete, screws, or metal fittings. And yet the buildings are still standing after many centuries, magnificent and complex engineering works created using intricate workmanship, knowledge and know-how – and all without computer-aided design or finite element analysis.
determine loads down to the ground and reach an equilibrium. In the arch design, each weight along the cord represented a Tension along the cord stone in the future edifice, but in mirror image with respect to the horizontal plane. The result is a simple and efficient compression arch.
By
fibre placement
T
he arches of old bridges are capable of absorbing stress through compression between the stones. Correct bridge design places the stones under compression by the bridge’s own weight. The mortar and/or the adhesion between stones allows a slight transverse load (shear), making the engineering structure stable under exterior loads.
Resin area of use
- design tools, - modelling tools, or - production facilities.
Design: looking to the future with a glance in the rearview mirror
French trade guild’s design method
The medieval equivalent of a funi-cular diagram used a cord and weights to
Composite manufacturers complain about poorly designed parts, often with reference to the “black metal” concept, i.e. the idea that the design of these parts tends to be based on methodologies from expertise in metal design that are not directly applicable to composites. The composite part cannot be defined as a function of:
No63 March 2011 / jec composites magazine
Function to create
Defining process
Fibre placement
Choice of material
GUY VALEMBOIS CHAIRMAN, CONSEIL & TECHNIQUE
Choice of material
The computer tools must serve the designer by correctly defining the intrinsic performance of the chosen materials, and this means defining the physical phenomena that are capable of destroying the materials. Correct fibre placement is crucial for the mechanical strength performance. A few simple rules to guarantee correct part
99
Technology & Innovations
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011
Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #63 - March 2011
Cover
Edito
Point of view: an extraordinary growth
Contents
Agenda of Events
COMPANY & BUSINESS
In Brief
Automotive - Sora Composites stays ahead of the field
China - CPIC Fiberglass, a strategy with results
APPLICATIONS
Marine - Case study: Composite surface smoothness improvement
Ballistic - Protection you can depend on
MARKET
Human capital - BMW, Composite specialists needed
Focus - Chinese composites market just keeps on growing
Trends - Airbus foresees demand for nearly 26,000 aircrafts the next 20 years
FEATURE SUSTAINABILITY
Market - Targets for bio-based composites and natural fibres
Fibre - Hemp: fibres meant for composites
Technical flax: a real opportunity for composites
Trends - Eco-design
Recycling - Sustainable recycling solutions for composites
SPECIAL JEC COMPOSITE 2011
2nd I.I.C.S.
Awards
JEC Innovation report 2011
RESEARCH & DEVELOPMENT
Medical/bio-composite - Mechanical properties vs. fabrication for medical applications
Prepreg - Innovative epoxy prepregs using bio-based curing agents
TECHNOLOGY & INNOVATIONS
Moulding - Towards smarter, more autonomous moulds
Prepreg - New coating-line concepts for high-precision prepreg products
Carbon fibre - State-of-the-art equipment for carbon fibre production lines
Fibre placement - Optimized fibre placement for composites
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Cover
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 2
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Edito
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Point of view: an extraordinary growth
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 5
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Contents
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 7
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - JECBoston
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Aero
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - In Brief
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Automotive - Sora Composites stays ahead of the field
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - China - CPIC Fiberglass, a strategy with results
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 19
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 20
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Marine - Case study: Composite surface smoothness improvement
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 22
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 23
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Ballistic - Protection you can depend on
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 25
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 26
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Human capital - BMW, Composite specialists needed
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Focus - Chinese composites market just keeps on growing
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 29
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Trends - Airbus foresees demand for nearly 26,000 aircrafts the next 20 years
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Market - Targets for bio-based composites and natural fibres
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 32
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Technical flax: a real opportunity for composites
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Trends - Eco-design
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 43
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Recycling - Sustainable recycling solutions for composites
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 2nd I.I.C.S.
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 52
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - IICS
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Poster
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Awards
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - JEC Innovation report 2011
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Medical/bio-composite - Mechanical properties vs. fabrication for medical applications
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 85
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Prepreg - Innovative epoxy prepregs using bio-based curing agents
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 89
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Moulding - Towards smarter, more autonomous moulds
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 92
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Prepreg - New coating-line concepts for high-precision prepreg products
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - 95
JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Carbon fibre - State-of-the-art equipment for carbon fibre production lines
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JEC COMPOSITES MAGAZINE - Issue #63 - March 2011 - Fibre placement - Optimized fibre placement for composites
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