Prototype of Composite Material Pressing Tool using an Electropneumatic System A Learning Media

Abstract

This study aims to analyze the effect of pressure variations on the characteristics of the maximum load and extension of specimens in compression testing. Tests were conducted on five specimens, namely A, B, C, D, and E, with pressure variations of 4, 5, 6, 7, and 8 bar, respectively. All specimens have a thickness and width of 5 × 13 mm and an initial length () of 50 mm. The parameters observed include the maximum load () and the extension value during the test. The test results show that an increase in pressure from 4 bar to 8 bar is followed by an increase in the maximum load from 55 N to 170 N. Conversely, the extension value decreases from 8.2 mm to 4.3 mm. At pressures of 4, 5, 6, 7, and 8 bar, the maximum loads obtained are 55, 88, 94, 112, and 170 N, respectively, while the extension values are 8,2; 7,8; 6,2; 5,8; and 4,3 mm. These results indicate a tendency for a positive relationship between pressure and maximum load and a negative relationship between pressure and extension under these test conditions. The highest maximum load was obtained at a pressure of 8 bar, while the lowest extension also occurred at that pressure. Thus, pressure variations affect the measured mechanical response of the specimen. However, further interpretation of material strength requires information on the material type, loading method, and test equipment characteristics.