PENGARUH TEKANAN METODE VACUUM BAGGING PADA
PEMBUATAN KOMPOSIT BERPENGUAT SERAT BAMBU
TERHADAP KEKUATAN BENDING
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Institusion
INSTITUT TEKNOLOGI DIRGANTARA ADISUTJIPTO
Author
FACHRUR HERNOMO AJI, MUHAMMAD
Subject
T Technology (General)
Datestamp
2024-06-11 02:17:09
Abstract :
In the last few years, a lot of research on composites has focused on natural fiber composites as an alternative to replacing fibers that are difficult to manufacture or even find. With the increasing effort in the use of composites, the need for composite manufacturing has also increased where the application of better methods such as the use of the vacuum bagging method can be a solution to overcome problems that exist in conventional fabrication techniques such as the hand lay-up method. The bending test and SEM test will be applied to bamboo fiber reinforced composites with a composition consisting of 40% fiber volume fraction, 59% resin volume fraction and 1% catalyst volume fraction. The specimens were fabricated through the hand lay-up method and the vacuum bagging method (with variations in the pressure to be used in the vacuum pump are 15 inHg, 20 inHg and 25 inHg) which were then formed according to the provisions in ASTM D7264-15. Based on the test results obtained, it can be seen that the fabrication method can affect the bending stress value where the composite fabricated through the vacuum bagging method with a pressure variation of 25 inHg has the highest average bending stress value of 26,50 MPa. In addition, the vacuum bagging method can also be said to be still not fully effective because the vacuum is unable to remove gases and voids that have been attached to the laminate due to the curing process that has started before the vacuum process. However, some of the gases and voids on the surface can be removed by vacuum so that they have better mechanical properties than the hand lay-up method.
In the last few years, a lot of research on composites has focused on natural fiber composites as an alternative to replacing fibers that are difficult to manufacture or even find. With the increasing effort in the use of composites, the need for composite manufacturing has also increased where the application of better methods such as the use of the vacuum bagging method can be a solution to overcome problems that exist in conventional fabrication techniques such as the hand lay-up method. The bending test and SEM test will be applied to bamboo fiber reinforced composites with a composition consisting of 40% fiber volume fraction, 59% resin volume fraction and 1% catalyst volume fraction. The specimens were fabricated through the hand lay-up method and the vacuum bagging method (with variations in the pressure to be used in the vacuum pump are 15 inHg, 20 inHg and 25 inHg) which were then formed according to the provisions in ASTM D7264-15. Based on the test results obtained, it can be seen that the fabrication method can affect the bending stress value where the composite fabricated through the vacuum bagging method with a pressure variation of 25 inHg has the highest average bending stress value of 26,50 MPa. In addition, the vacuum bagging method can also be said to be still not fully effective because the vacuum is unable to remove gases and voids that have been attached to the laminate due to the curing process that has started before the vacuum process. However, some of the gases and voids on the surface can be removed by vacuum so that they have better mechanical properties than the hand lay-up method.
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