Abstract
Unique, high pressure CFRP hydraulic cylinder incorporated stroke sensor was developed. As a first step of development, a unique CFRP-METAL joint using. a filament-winding method was developed, which had a high strength and high fatigue limit. In this method, strength of carbon fiber is fully exhibited. Effectiveness of the method was confirmed by the models of hydraulic cylinder. The joint strength of rod was more than 390 MPa and the tube endured more than 106 times impul-sive dynamic pressure of 27 MPa.Second, we developed integrated, smart stroke sensor, suitable for CFRP cylinder construction.By combining above two key technologies, we manufactured complete 21 MPa rating CFRP hydraulic cylinder incorporated stroke sensor. Stroke of the cylinder is 500mm, inner dia. is 50mm and rod dia. is 28mm. The weight of manufactured cylinder is 4.7 kg, less than 1/3 of steel cylinder and 1/6 of commercial steel cylinder including stroke sensor.
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