Hello,

I want to buy the fiberglass fabrics you have but i have worked hard to find any mechanical properties for it and i have failed to do so, can you please help me figuring it out. I specifically wants to buy the Biaxial Glass Cloth 600g 1.27m Wide. I although want to compare it with the Carbon fiber 2x2 twill 200gsm and to make an analysis on both of them to make the best compromise between cost and weight. 

My second question is, is it okay to use un-symmetric materials around the core, for example, i am building a monocoque car chassis and i want to make a laminate of

200 gsm 2x2 carbon (0,90)
600 gsm Biaxial glass cloth (-45,+45)
Lantor soric (3mm)
600 gsm Biaxial glass cloth (0,90)

I am intending to make it by the resin infusion method but i have read multiple articles says that it's advisedto make the materials symmetrical around the core to avoid any distortions due to the different CTE.

I will be very thankful if you have told me if one layer of a 2x2 200gsm carbon fiber (0,90) is equivalent to ??? gsm Biaxial glass (0,90)

Regards,
I appreciate your help,

Hi,

The problem with most glass fibre is there is little mechanical data produced for them.

Generally manufacturers tend to rely on standard grade terminology and fibres such as E-Glass and S-glass which have commonly available data. That way they do not need to provide much specific data as E-Glass properties are widely known within the industry.  That makes it difficult when those on the fringes of the industry and low volume users need the data for calculations.  This means that without your own testing data, you are stuck with using data online from sources such as MatWeb etc.

In terms of laminate balancing, you will be best with a balanced laminate. as that will prevent tension building up across the laminate which could cause it to warp or twist.

Because of the vastly different properties, it is hard to give an exact comparison between carbon and glass but in broad brush terms a 200gsm twill carbon cloth would be roughly similar to a 280gsm twill glass cloth.  However, remember that the glass cloth will be both thicker and heavier in terms of cloth alone and resin uptake.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant