Mujiyono, Fellya Sagita Damayanti, Didik Nurhadiyanto, Fredy Surahmanto, Virda Hersy Lutviana Saputri, Consorcio S. Namoco, Shigeyuki Haruyama
Charcoal from biostove pyrolysis has the potential to be further processed as a filler for epoxy composite materials. However, there is not much use of charcoal as a filler for epoxy composite materials. The characteristics of charcoal material from biostove pyrolysis as an epoxy filler are not yet known. The aim of this research is to test the material resistance and damage formation of charcoal-filled epoxy composite materials using quasi static tests. Composite materials are printed using the hand layup method. The composite sample placed between the support plate and cover plate and then locked with bolts on all sides. The indenter is in the middle of pressing the material at low speed until the composite sample is penetrated by the indenter. Tests were carried out to determine the SEA (specific energy absorption) value and the form of damage experimentally. The total energy value absorbed in the material first. This total energy is obtained by calculating the area under the force-displacement curve for each sample that has been tested. Damage formation of composite materials is known from the results of quasi static tests. The load is applied to the composite material until material damage occurs. This damage is indicated by the penetration of the indenter. The results of the research stated that from the quasi-static test it was found that the higher the percentage of charcoal volume fraction resulted in the greater the SEA value of the material from V10%, V15%, V20%, and V25% with an average increase of 16%. Damage formation in composite materials tends to be radial cracks. The interesting thing about this research is that the higher the volume fraction percentage of charcoal, the more ductile it is. This can be seen from the shape of the hole used by the indenter which is not broken. © The Author(s) 2025.
Department of Mechanical Engineering Education, Universitas Negeri Yogyakarta, 1 Colombo str., Karangmalang, Yogyakarta, 55281, Indonesia; College of Technology, University of Science and Technology of Southern Philippines, C. M. Recto ave., Lapasan, Cagayan de Oro City, 9000, Philippines; Graduate School of Management of Innovation and Technology, Yamaguchi University, 2-16-1 Tokiwadai, Yamaguchi, Ube, 755-8611, Japan
