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A methodology is presented here for deriving true experimental axial stress-strain curves in both tension and compression for monolayer graphene through the shift of the 2D Raman peak that is present in all graphitic materials. The principle behind this approach is the observation that the shift of the 2D wavenumber as a function of strain for different types of PAN based fibres is a linear function of their Young's moduli and, hence, the corresponding value of the shift of the 2D Raman peakdoi:10.1016/j.carbon.2014.09.064 fatcat:odyktpa5nrd4fbtajqstq3zbim