compcrash

Characterisation of crash behaviour of composites towards future lightweight road vehicles

Thomas Bru

Ph.D. Student at Swerea SICOMP – Structural design [email protected]

1 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Overview

Characterisation of crash behaviour of composites towards future lightweight road vehicles

• Starting date: Oct 2011 (for me Oct 2013) • Finish date: May 2016 • EM project number: 34181-1 • Budget: 4.5 MSEK 2 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Composites applications

Aerospace Construction Sport

787 composite fuselage

Light High performance Corrosion resistance

Column Repair

3 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Composites applications

Automotive Light High performance Cost Manufacturing Corrosion resistance

Aston Martin V12 Vanquish

Today, huge interest for introducing composite in passenger cars

after Hill (2003)

Hill (2003). Adhesively bonded structural composites for Aston Martin vehicles. 3rd Annual SPE Automotive Composites Conference, Troy, MI.

4 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Crashworthiness requirements

Full scale crash test

Requirement: constant deceleration of the car

Reliable simulation

Physically based material model + Structural consideration

Lab scale

Energy Absorption Failure mechanisms within the composite material (e.g. fibre failure)

Light High performance Corrosion resistance Crashworthiness

Grauers et al. (2014)

Grauers et al. (2014). Energy absorption and damage mechanisms in progressive crushing of corrugated NCF laminates: Fractographic analysis. Composite Structures;110:110 –117.

5 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Physically-based material model for crash simulation



phenomenological approach, based on experimental observations

INPUTS

 Failure mechanisms within the material  Accurate mechanical properties and behaviour of the material

OUTPUTS

 Energy absorption capability of the material under different loading conditions + structural design Physically-based material model 6 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Summary

• Huge interest for the introducing composites into cars

Light High performance Corrosion resistance Crashworthiness Make vehicle lighter, safer, and more Fuel Efficient

• Car industry needs reliable simulation for crash of composites • Experimental material characterisation is required for the development and validation of a material models 7 | Energimyndigheten , Thomas Bru | 9 Oct 2014

8 | Energimyndigheten , Thomas Bru | 9 Oct 2014

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