compcrashCharacterisation of crash behaviour of composites towards future lightweight road vehicles

Ph.D. Student at Swerea SICOMP – Structural designthomas.bru@swerea.se

Thomas Bru

1 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Overview

• 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

Characterisation of crash behaviour of composites towards future lightweight road vehicles

Composites applications

787 composite fuselage

Aerospace

Column Repair

Sport

Construction

Light

High performance

Corrosion resistance

3 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Composites applications

4 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Aston Martin V12 Vanquish

after Hill (2003)

Automotive

Light

High performance

Corrosion resistance

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

Cost

Manufacturing

Today, huge interest for introducing composite in passenger cars

Crashworthiness requirements

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

Requirement: constant deceleration of the car

Full scale crash test

Lab scale

Reliable simulationPhysically based material model

+Structural consideration

Energy Absorption

5 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Light

High performance

Corrosion resistance

Crashworthiness

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

Grauers et al. (2014)

Physically-based material model for crash simulation

Physically-basedmaterial model

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

6 | Energimyndigheten , Thomas Bru | 9 Oct 2014

phenomenological approach, based on experimental observations

Summary

• Huge interest for the introducing composites into cars

• Car industry needs reliable simulation for crash of composites• Experimental material characterisation is required for the

development and validation of a material models

Make vehicle lighter,

safer, and more Fuel-

Efficient

Light

High performance

Corrosion resistance

Crashworthiness

7 | Energimyndigheten , Thomas Bru | 9 Oct 2014

Vi arbetar på vetenskaplig grund för att skapa industrinytta.www.swerea.se

8 | Energimyndigheten , Thomas Bru | 9 Oct 2014