Development of composıte materıal desıgn mıght be used for vıbratıon dampıng of machıne bench bodies

The materials used in the bases and bodies of the machine benches are effective on the precision of the process performed by the machine. In terms of machine service life and product quality, it is necessary to know the mechanical and dynamic properties of these materials and especially materials with good vibration isolation capability should be preferred. In this context, commonly used materials can be given cast iron and steel. However, as an alternative to these materials, composite materials produced by mineral casting, which is a polymer matrix composite material with higher vibration absorption capability, have been developed recently. Mineral casting contains aggregates in various forms, silica sand and epoxy resin as a binder. This mixture hardens at room temperature and while waiting. While it can be used in all machine tools that require precise measurement, it is thought that mineral casting will be used as a modern building material in the near future due to its advantages. In this study, a polymer matrix composite system was developed in order to minimize the vibration problem occurring in modern machine tools, and the vibration characteristics and elastic modulus values of the developed system were investigated. For this purpose, different composite material mixture recipes were prepared, and aggregates and sands prepared in various forms were preferred in this study considering the frequency of use in the industry. Various numbers of beam test samples of 20x25x480 mm3 from mixture recipes for vibration tests, and for compression tests, cylindrical test samples of Ø50 mm with a length of 100 mm were prepared from the same mixture formula. With the experimental modal analysis method, the natural frequency and damping ratios of each beam were obtained with the help of the Frequency Response Function (FRF), and compared with the elastic modulus values with the compression test results. According to the findings of the study, when the vibration damping data and elastic modulus values are taken into consideration, it has been concluded that the most important factor affecting the vibration damping capability of the composite structure is the pebble and epoxy ratios in the composite structure