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App.H: Example for Representative Data: Unidirectional Carbon Tapes made of TPW tape with 5631 fibres [Table of Contents]

DNV-OS-C501 Composite Components

[-] App.I: Example for representative data Unidirectional carbon tape TPW 0434 Prepreg

APPENDIX I
Example for representative data
Unidirectional carbon tape TPW 0434 Prepreg

App.I
A. General

App.I
A 100   

App.I A
101   This appendix describes an example of a fairly complete set of data for a carbon fibre reinforced epoxy laminate. The laminates were made of carbon tape TPW 0343 Prepreg.

App.I A
102   Data were supplied by Tenax Fibers, Germany.

App.I A
103   Laminates made of similar carbon fibres may be similar to this example and can be qualified according to section 4 H600 - Qualification against representative data.

App.I A
104   Matrix dominated properties may change considerably when changing the resin system.

App.I A
105   Laminates made of carbon fibres with different characteristics than IMS 5131 410tex f12000 t0 may have very different properties from the ones listed here.

App.I A
106   Representative data for other materials can be measured and used like this example, as long as the requirements given in section 4 H500 and 600 are fulfilled.

App.I A
107   There is a lack of data for matrix dominated properties and of properties in water. Properties in other fluids are not listed, since only few and specific data exist. If such properties are needed some qualification testing may be required.

App.I
B. Definition of material

The material is described according to section 4 H502.

App.I B
Table B1 Properties to define the material 
Constituent materials: Requirements to group measurements from different laminates 
Generic Fibre type Carbon-PAN Precursor 
Bundle type 12k filaments per tow 
Fibre trade name IMS 5131 410tex f12000 t0 
Type of weave Unidirectional Tape 
Type of sizing Epoxy compatible 
Fibre Manufacturer Tenax Fibers Germany 
Tape Manufacturer  
Fabric trade name and batch number UD-Prepreg TPW0343 
Generic resin type (e.g. epoxy, polyester) Epoxy 
Specific resin type (trade name, batch number) CIBA 6376 
Catalyst (trade name and batch number) --- 
Accelerator (trade name and batch number) --- 
Fillers (trade name and batch number) --- 
Additives (trade name and batch number) --- 
  
Process parameters:  
Laminator (company)  
Processing method Autoclave cured 
Processing temperature 177oC for 150 minutes 
Processing pressure 6.0 bar 
Process atmosphere (e.g. vacuum) 0.99 bar 
Post curing (temperature and time) none 
Control of fibre orientation --- 
Fibre volume fraction 58-60 % 
Void content 1.88 - 2.06 % 
  
Conditioning parameters:  
See sections for properties:  

App.I
C. Quasi static properties in air (QSA)

App.I
C 100   Test environment

App.I C
101   The test environment is described according to section 4 H502.

App.I C
Table C1 Conditioning parameters 
Temperature 23 oC 
Water content of the laminate (wet, dry) dry 
Chemical environment air 
Loading rate 1-2 mm / minute * 
Number of specimens  
 Reported individually for all properties 

*Rates varied slightly between test methods. Shear data were obtained from ±45 laminates tested at 2 mm/minute and sometimes at faster rates of about 6 mm/min after 2% strain.

App.I C
102   The following properties are listed according to section 4 B200. Characteristic values are calculated according to section 4 B400.

App.I C
103   Data are based on a set of 6 measurements for each property, backed up by more than 50 measurements from production control.

App.I
C 200   Fibre dominated ply properties

App.I C
Table C2 Fibre dominated ply properties 
 Para-meter  Value Unit Explanation 
Fibre dominated properties E1 (UD ply) Mean  170.6
(136.9) 		[GPa] Modulus of elasticity in main fibre direction, in tension and (compression) 
COV 0.82 %
(1.69%) 
Charact.value as mean 
raster  Mean  0.0162 Strain  Tensioning strain at break in the main fibre direction. Characteristic value calculated from strength data. 
COV 1.49 
Charact.value 0.0156 
raster  Mean  1.13 Strain  Compressive strain at break in the main fibre direction.
Values calculated from strength data.* 
COV  
Charact.value 1.06 
raster  Mean  2835.6 N/mm2 (MPa) Tension stress at break in the main fibre direction  
COV 3.1% 
Charact.value 2659.8 
raster  Mean  1547.9 N/mm2 (MPa) Compressive stress at break in the main fibre direction 
COV 3.18% 
Charact.value 1449.4 

*The measured compressive strain at failure was 1.195% with a COV of 3.48%. A lower value was put in the table to allow easy linear ply analysis. A higher strain to failure can be used, but non-linear effects should be taken into account, i.e., drop of Young's modulus.

App.I
C 300   Matrix dominated ply properties

App.I C
Table C3 Matrix dominated ply properties 
 Parameter  Value Unit Explanation 
Matrix dominated properties 
E2 (UD ply) 		Mean  9.5 [GPa] Modulus of elasticity transverse to main fibre direction  
COV 1.19 % 
Charact.value as mean 
raster  Mean  0.0081 Strain Tensile strain at break for the matrix in direction normal to the fibre direction, in the fibre plane.
Characteristic value calculated from strength data. 
COV - 
Charact.value 0.0070 
raster  Mean  - Strain Compressive strain at break for the matrix in direction normal to the fibres. 
COV - 
Charact.value - 
raster  Mean  77.1 N/mm2 (MPa) Tension stress at break normal to the fibre direction. 
COV 6.69 % 
Charact.value 66.8 
raster  Mean  - N/mm2 (MPa) Compressive stress at break normal to the fibre direction. 
COV - 
Charact.value - 
raster  Mean  - Strain Shear strain in ply plane at linear limit and at (failure). 
COV - 
Charact.value - 
raster  Mean  91.9 N/mm2 (MPa) Shear stress in ply plane at (failure). 
COV 4.48 % 
Charact.value 83.5 
G12 linear Mean  - [GPa] Shear modulus in the ply plane in the liner range 
COV - 
Charact.value - 
G12 non-linear Mean  4.5 [GPa] Shear modulus in the ply plane at the failure point 
COV 4.24 % 
Charact.value as mean 
n12 Mean  -  Ply major Poisson's ratio 
COV - 
Charact.value - 

App.I
C 400   Through thickness ply properties

App.I C
401   There are no representative data.

App.I
D. Long term properties

App.I
D 100   

App.I D
101   There are no representative data, for service in air or water.
App.H: Example for Representative Data: Unidirectional Carbon Tapes made of TPW tape with 5631 fibres [Table of Contents]