Determination of GRPs interlaminar separation strength under short-time static loading
The authors analyzed a new method for determination of interlaminar separation strength of quasi-homogeneous structural GRPs by means of cross-shaped specimens testing. The main advantage of the proposed specimen is that it can be manufactured from a plate of material required for manufacturing of real structure or from plane (crop) part of the structure. The method procedure includes (as initial stage) experimental determina-300tion of strength characteristic averaged according to separation area, that can be practically used for comparative assessment of GRPs resistance to interlaminar separation. For assessment of material strength limit value it was proposed to introduce correction factor for averaged strength characteristic; the correction factor is obtained by means of finiteelement method. Calculation results are in compliance with available data for investigated type of GRP applied in shipbuilding. The dependency of the correction factor on material thickness is provided for practical purposes.