JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 52

core material
Tab. 2: Experimental results

Compressive
strength (bare)

Density

Designation

Compressive
strength (stabilized)

Shear strength

Crush strength

L

W

kg.m

lb.ft

MPa

psi

MPa

psi

MPa

psi

MPa

psi

MPa

psi

ALCORE PAA 5052
3.0-3/8-.0020 theoretical

48

3.0

-

-

2.17

314

0.93

135

1.41

204

0.88

128

ALCORE PAA 5052
3.0-3/8-.0020 measured

46.2

2.9

1.80

261

1.93

280

1.05

152

1.48

215

0.82

119

New EC3D honeycomb measured

46.0

2.9

3.13

454

3.24

470

1.35

196

1.71

248

0.96

139

-3

-3

Improvement

+73.8 %

+67.8 %

+28.5 %

+15.5 %

+17.1 %

48 kg.m-3
59.2 kg.m-3

Tab. 3: Synthesis of comparative results

1), on a Lloyd LR50K machine in quasi-static conditions
(0.5 mm.min -1). As expected, all the mechanical characteristics were improved (Table 2).

Compression
The compressive strength of the EC3D modified honeycomb was 73.8% higher in the bare state and 67.8% higher
in the stabilized state (sandwich structure).

Fig. 6: Compressive strength versus density by wall thickness

Main characteristics
- Ultra-high mechanical properties
- 20% lower raw material cost for the same properties
- Unique compression/energy absorption: compressive
strength up to 170% of standard honeycomb
- Improved formability
- Fully compatible with current production lines
- Patents EP 14713529.7 and US 14/774,360

Shear properties
The shear properties were also enhanced, with a 15.5% improvement of shear strength in the L direction (lengthwise)
and a 17.1% improvement in the W direction (widthwise).

Conclusion
As shown in the synthesis below (Table 3), raw material
costs can be reduced by 20% for the same mechanical
properties.
For applications that require only compressive properties as a main characteristic, the raw material cost can be
reduced even more for the same level of performance, by at

52 jec composites magazine / No106 July 2016

least 30% for the same compressive strength.
For example, this unique enhancement makes it possible
to use a 50 μm foil thickness instead of 70 μm for the same
level of compression performance (Figure 6).
This opens good cost reduction opportunities for future
programmes, especially in aeronautics. n
More information:
www.engineeringcomposite3d.com
Contact:
contact@engineeringcomposite3d.com


http://www.engineeringcomposite3d.com

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #106 - July 2016

Cover
Edito
Point of view: Europe
Contents
COMPANY & BUSINESS
Development
Agenda of Events
APPLICATIONS
Thermoplastics
Automotive
MARKET
Aircraft engine
FEATURE AERONAUTICS
Aerostructures
Characterisation
Thermoplastics
Aero-engines
Process
CFRP
Semi-product
RESEARCH & DEVELOPMENT
Review
Core material
TECHNOLOGY & INNOVATIONS
NDT
Marine
Index
In the world
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Ad1
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Cover
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 2
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Edito
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Point of view: Europe
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 5
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Contents
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 7
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - COMPANY & BUSINESS
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 9
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Development
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 11
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 13
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - AdHEC
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - AdCro
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Thermoplastics
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 15
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 16
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Automotive
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Aircraft engine
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 19
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 20
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 21
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 22
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Aerostructures
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 24
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 25
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Characterisation
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 27
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 28
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 29
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 30
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Thermoplastics
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 32
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Aero-engines
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 34
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 35
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 36
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Process
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 38
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 39
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - CFRP
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 41
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 42
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Semi-product
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 44
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 45
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Review
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 47
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 48
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 49
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Core material
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 51
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 52
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - NDT
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 54
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Marine
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 56
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - Index
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - In the world
JEC COMPOSITES MAGAZINE - Issue #106 - July 2016 - 59
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