THE TRANSITION FROM OUT-OF-PLANE TO IN-PLANE KINKING DUE TO OFF-AXIS LOADING
Paper in proceedings, 2018



A comprehensive test campaign has been performed on coupon level to gain fundamental understanding of compressive failure in unidirectional NCF composites for aerospace applications. A subset of this study is focusing on the effect of off-axis loading, where a number of laminates have been tested with fibres oriented in off-axis angles in the interval 0-20° in steps of 5°. Our hypothesis is that 0° laminates fail by kinking out-of-plane and as the off-axis angle is increased, there is a shift to in-plane kinking as the in-plane shear component increases. The contribution from this shear component on kinking will have little effect on the compressive strength until in-plane kinking becomes "dominant" over out-of-plane kinking. Preliminary results indicate a transition from out-of-plane to in-plane governed kinking to occur at an off-axis angle between 10° and 15°.

Kinking

Compression

NCF

Off-axis

Author

Dennis Wilhelmsson

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Edgren Fredrik

Renaud Gutkin

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Leif Asp

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

18th Conference on Composite Materials
Athens, ,

Dimensioneringsmetodik för tryckbelastad NCF komposit (KOMPRESS II)

VINNOVA, 2017-11-10 -- 2019-12-31.

Kompressionsbrott i komplexa NCF kompositstrukturer - KOMPRESS

VINNOVA, 2013-09-01 -- 2017-06-30.

Subject Categories

Wood Science

Applied Mechanics

Composite Science and Engineering

Areas of Advance

Transport

Materials Science

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

More information

Created

6/29/2018