### Abstract

the applied strain below which initial local buckledriven

propagation of a delamination will not occur

is applied to a ±o surface sublaminate. The Strip

Model is shown to perform well, compared to

experiments and Finite Element Analysis, when the

mismatch between the Poisson’s ratio of the full

laminate and surface sublaminate is less than 0.5.

Laminates with larger mismatches which induce

lateral compression in the sub-laminate propagate

earlier than predicted. Mismatches that put the

delaminated sublaminate into transverse tension are

shown to improve resistance to delamination

propagation. The most favourable surface plies, both

in terms of strength following delamination and

buckling capacity of the full laminate are confirmed

to be ±45o.

Language | English |
---|---|

Number of pages | 10 |

Status | Published - 21 Aug 2011 |

### Fingerprint

### Keywords

- Buckling
- Delamination
- Propagation
- Poisson's ratio

### Cite this

**The influence of fibre angle on the compressive strength of delaminated surface plies.** / Rhead, Andrew; Butler, Richard; Baker, Neil.

Research output: Contribution to conference › Paper

}

TY - CONF

T1 - The influence of fibre angle on the compressive strength of delaminated surface plies

AU - Rhead, Andrew

AU - Butler, Richard

AU - Baker, Neil

PY - 2011/8/21

Y1 - 2011/8/21

N2 - An extremely efficient Strip Model which predictsthe applied strain below which initial local buckledrivenpropagation of a delamination will not occuris applied to a ±o surface sublaminate. The StripModel is shown to perform well, compared toexperiments and Finite Element Analysis, when themismatch between the Poisson’s ratio of the fulllaminate and surface sublaminate is less than 0.5.Laminates with larger mismatches which inducelateral compression in the sub-laminate propagateearlier than predicted. Mismatches that put thedelaminated sublaminate into transverse tension areshown to improve resistance to delaminationpropagation. The most favourable surface plies, bothin terms of strength following delamination andbuckling capacity of the full laminate are confirmedto be ±45o.

AB - An extremely efficient Strip Model which predictsthe applied strain below which initial local buckledrivenpropagation of a delamination will not occuris applied to a ±o surface sublaminate. The StripModel is shown to perform well, compared toexperiments and Finite Element Analysis, when themismatch between the Poisson’s ratio of the fulllaminate and surface sublaminate is less than 0.5.Laminates with larger mismatches which inducelateral compression in the sub-laminate propagateearlier than predicted. Mismatches that put thedelaminated sublaminate into transverse tension areshown to improve resistance to delaminationpropagation. The most favourable surface plies, bothin terms of strength following delamination andbuckling capacity of the full laminate are confirmedto be ±45o.

KW - Buckling

KW - Delamination

KW - Propagation

KW - Poisson's ratio

UR - http://www.iccm-central.org/Proceedings/ICCM18proceedings/data/2.%20Oral%20Presentation/Aug24(Wednesday)/W12%20Damage%20Tolerance%20and%20Impact%20Session/W12-1-AF0219.pdf

M3 - Paper

ER -