Composite materials are solid materials made through the association of several materials with complementary characteristics (fibreglass + polyester resin, for example).
This association gives them a number of properties- mechanical, chemical etc. – which they would not possess individually.
The main constituents are the reinforcement (fibreglass, carbon, Kevlar etc.) and the matrix (polyester resin, epoxy, vinyl ester etc.). The purpose of the reinforcement is to support most of the mechanical load applied to the composite material.
The role of the matrix (or binder) is to bind the reinforcements together, protect them from the external environment (corrosion, chemical agent, for example) and distribute the mechanical load applied.
Applications: transport, industry, sport & leisure, construction, medical, energy, automobile, etc.
Applications: aeronautics, defence, industry, transport, automobile, sport & leisure etc.
Applications: aeronautics, defence etc.
N.B. This is not a complete list of the reinforcements and resins used at Sobelcomp
|Features||Metals||Composites with organic matrices (1)|
|35 NCD 16 Steel||AU 4 SG Aluminium Alloy||TA 6 V Titanium Alloy||HR Carbon/epoxy resin||HM Carbon/epoxy resin||Aramid/epoxy resin||R Glass /epoxy resin|
|Tensile strength R(MPa)||1850||500||1000||1000 to 1300||1000||1300 to 1800||1800 to 2000|
|Young’s modulus E (GPa)||200||72||110||130||200||75||53|
|Breaking strength R/ᵨg (km)||24||18||23||65 to 85||60||95 to 130||90 to 100|
|Young’s modulus E/ᵨg (km)||2500||2600||2500||8700||11800||5500||2650|
|Coefficient of linear expansion(K-1):|
|Longitudinal||12 – 10-6||23 – 10-6||(2)||-0.2 – 10-6||-0.8 – 10-6||-5 – 10-6||6 – 10-6|
|Transverse||12 – 10-6||23 – 10-6||(2)||35 – 10-6||35 – 10-6||60 – 10-6||31 – 10-6|
(1) Unidirectional composites with 60% fibre volume
(2) Values unknown by author
g acceleration due to weight
According to A. Négrier and J.C. Rigal