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An extraction system MUST be used. Raising the parameters to
speed up work can represent a health risk if this leads to vapours,
smoke or dust being produced.
The following personal protective equipment must be used:
1 - Protective gloves
2 - Safety goggles
3 - Protective clothing
4 - Protective mask
Note
♦
Only trained personnel are permitted to carry out work on
CFRP components.
♦
Drilling, sawing, grinding and cutting work or any other forms
of machining must not be performed on CFRP components.
♦
CFRP is electrically conductive. However, it is not permissible
to create an electrical earth connection via CFRP.
♦
When working with electrical wires, all contact with CFRP
components must be avoided (danger of short circuit).
♦
When performing repair work on vehicles and when removing
and installing components such as power units, it is essential
to avoid all major contact with CFRP components (danger of
irreparable and non-visible damage to CFRP structure).
♦
When performing work on the vehicle body, it is only permitted
to use materials (e.g. primer, adhesive, rivets) approved by the
manufacturer.
♦
When performing work on the vehicle body, it is only permitted
to use procedures approved by the manufacturer.
Properties of CFRP:
CFRP is the abbreviation for carbon fibre-reinforced plastics (or
carbon fibre-reinforced polymers).
Diameter of fibres = approx. 6µm
Specific weight = 1.8g/cm³
Tensile strength = 3530-4560 MPa
Elongation = 1.1-1.5 %
Between 1,000 and 24,000 individual fibres are twisted together
to form bundles which are weaved together.
Advantages of CFRP components
♦ Extremely low weight: approx. 60% lighter than steel, approx.
30% lighter than aluminium
♦ Outstanding stability: approx. 4 times more resilient than alu‐
minium
♦ 100% corrosion-proof
♦ Gas-tight and pressure-sealed
♦ High long-term thermal stability
♦ Barely measurable thermal expansion
Disadvantages of CFRP components
♦ Very expensive materials
General InformationBody Repairs, General Body Repairs - Edition 04.2018
5. Assessing damage 17
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