Numerical and Experimental Analysis of the Base of a Composite Hydraulic Cylinder Made of PET

The paper presents the process of designing a base made of PET that will be used as an element of a hydraulic cylinder made of composite materials. The requirements for the designed element include the possibility of working with mechanical and thermal loads comparable to conventional cylinders. The choice of material based on the set criteria and assigned weights, experimental research of its real properties, numerical calculations of the element as well as experimental verification on the real object were presented. The material’s non-linearity and the change of its parameters as a function of working temperature were taken into account.