Hi, I'm just working on some structural calcs; does anyone have the material properties for the fibre used in the standard carbon cloth, tensile strength, youngs modulus etc. any info like this would be really appreciated.

Cheers, M

Hi Maverick,

The fibre type used in many of our standard cloths is the Toray T300 Here's some data on the fibre;

Carbon Fibre Properties
                                        English              Metric
Tensile Strength                 512 ksi                3,530 MPa
Tensile Modulus                  33.4 Msi              230 GPa
Strain                                1.5 %                  1.5 %
Density                              0.064 lbs/in3       1.76 g/cm3
Filament Diameter              2.8E-04 in.           7 μm
Yield;
1K                                    22,568 ft/lbs        66 g/1000m
3K                                    7,523 ft/lbs          198 g/1000m
6K                                    3,761 ft/lbs          396 g/1000m
12K                                  1,862 ft/lbs          800 g/1000m


CTE                               -0.41 α⋅10-6/°C
Specific Heat                   0.19 Cal/g⋅°C
Thermal Conductivity       0.025 Cal/cm⋅s⋅°C
Electric Resistivity            1.7 x 10-3 Ω⋅cm
Chemical Composition:    Carbon 93 %
                                      Na + K <50 ppm


If there's any further info that you require please let me know, I'm sure I can dig it out for you.

Paul Statham
Easy Composites / Carbon Mods - Technical

Hi,

I was woundering if you had any information on general properties on any laminations using your Epoxy EL2 laminating resin and your standard 195g 3k 2/2 twill carbon fibre?

I know this depends alot on the quality of production and variouse outher factors but it would be a useful guide.

Any help would be great!

Thanks,

Harry

Hi Harry,

We don't at the moment although I agree this would be something nice to have, particularly as a lot of our customers will be using the two materials (EL2 and our 3k carbon) together so some general performance figures for this combination would be good. You're right that it will vary significantly depending on the quality of the lamination, the resin-to-fibre ratio and the orientation of the plies but still, I'll see if we can get some mechnical data together in the future.

--Matt

Matt Statham
Easy Composites / Carbon Mods - Technical Sales

Hi Harry,

I can understand why this data would be really usefull, so I have calculated the properties of a typical laminate based upon the EL2 and the standard 200g twill, These figures are by no means guaranteed, processing variations will have a huge influence on the final performance of any laminate,

Young’s Modulus 0°                  GPa     74    
Young’s Modulus 90°                GPa     74    
In-plane Shear Modulus           GPa     5    
Ult. Tensile Strength 0°            MPa     630    
Ult. Comp. Strength 0°              MPa     585               
Ult. Tensile Strength 90°          MPa     630                  
Ult. Comp. Strength 90°            MPa     585           
Ult. In-plane Shear Stren.        MPa     94            
Ult. Tensile Strain 0°     ext         %     0.90        
Ult. Comp. Strain 0°     exc           %     0.85       
Ult. Tensile Strain 90°                  %     0.90      
Ult. Comp. Strain 90°                    %     0.85    
Ult. In-plane shear strain            %     1.80    
Density                                     g/cc    1.6

This Is based upon a fibre orientation of 0/90deg to the loading, post-cured resin and a fibre/resin ratio of 60/40 - All of these figures are presented for approximate information only and are NOT A GUARANTEE of performance for obvious reasons.

Paul Statham
Easy Composites / Carbon Mods - Technical

Hi Paul,

            I assume this calculation assumes the TORAY 300 mentioned previously.

I have some additional queries shown below:-

1. What would be the impact of using a stiffer 2x2 TWILL  cloth based upon TENAX UMS 40 or TORAYCA M340J for example ?

2. Can easy composites supply such a clith described in 1

3.  Does your calcutation apply equally to the wet lay up material or PRE-PEG material

4.  What is the difference in properties if the carbon/kevlar 2x2 TWILL material is used?

                                                                                                                                                Cheers,

                                                                                                                                                                  Maggie

Hey Paul,

Hi Chris,

For the kind of simulation you are doing, the approximate calculated figures based on Paul's previous work would unlikely be precise enough for your needs.  Our CarbonFibre Unidirectional 250g also uses a T300 fibre so the T300 data table Paul posted in his first post would be relevant to your calculations.

In terms of our EL2Epoxy Laminating Resin I can give you some more data:

	Hardness	Linear Shrinkage	Tensile Strength	Elongation at Break	Flexural Strength	Flexural Modulus	H.D.T
	Shore D	%	MPa	%	MPa	MPa	°C
AT30 SLOW	84-88	0.5	70.0-80.0	6.0-10.0	103-117	2600-3200	82-88
AT30 FAST	85-89	0.5	67.0-75.0	6.0-8.0	120-130	3600-4000	70-76

Note that the property of the resin is affected by the hardener used and also by the way it is processed. The figures above were obtained by the manufacturer after a cure cycle of 24 hours at room temperature (23C +-2C) with a 15 hour post cure at 60C.  Your cure conditions might well vary.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

I was wondering if you could tell me if all of these carbon cloths are made from T300 fiber.  If not, what is the fiber?

Except for the 1k 90g. those fabrics are made using grafil TR30S or TR50S fibres http://mrcfac.com/home-cfd/products-cfd/pyrofil-fiber/

The grafil fibres perform slightly better than the T300 in the older carbon we used to supply.

The 1k 90gsm (either finish) uses the T300 fibre http://www.toraycfa.com/pdfs/T300DataSheet.pdf

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant