I am doing concrete mechanical property testing in ANSYS APDL and want this information for my modelling. Can anyone help? What is the thickness of the single layered CFRP, BFRP and GFRP sheets with epoxy matrix? The elastic modulus of CFRP, BFRP and GFRP are 242 GPa, 89 GPa and 69 GPa respectively and that of epoxy matrix is 3.5 GPa.
it depends on the production quality and method. but usually it should be less than 1 mm. if you had final strength of your material, you could calculate it easily!
For hand lay up composite CFRP, the thickness of FRP/EPOXY matrix for single layer can range from 1 - 1.3 mm depending on the concrete surface eveness. assuming 1 mm thickness is reasonable.
Thanks Aidin Ghaznavi for the reply.
If the tensile strength of the CFRP/EPoxy is 2900 MPa. Then how can we calculate the thickness of the lamina.?
Dear Abdullah Al-Saidy
I have done my analysis by taking 1 mm thickness of single layered CFRP lamina and the result I found was increase the compression strength of plain concrete by 50 percent. Is this result valid?
During own tests with CFRP confined columns, thickness of one layer (1 CF sheet + Epoxy) was around 1 mm. Like suggested in answers above, thickness strongly depends on working conditions, skills of deployed staff, and so on. All in all, I perceived a remarkable spreading of thickness. To make matters worse, if I applied several layers of CF sheets, thickness did not increase commensurate to number of CF layers.
Hence, for analysis, I did not work with the thickness of the layered CFRP. At the end, it was more sufficient to utilize the thickness of the CF sheet. This value is much more reliable if compared to CFRP thickness.
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