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All Journal Journal of Mechanical Engineering Science and Technology Jurnal Rekayasa Material, Manufaktur & Energi Mekanika: Majalah Ilmiah Mekanika Journal of Metallurgical Engineering and Processing Technology Teknika STTKD: : Jurnal Teknik, Elektronik, Engine
Setiawan, Agris
UPN Veteran Yogyakarta
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Jurnal Rekayasa Material, Manufaktur

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Karakterisasi Variasi Biokomposit [CaCO3 : Bioplastik /Corn Starch] Terhadap Sifat Mekanis dan Mikrostruktur Setiawan, Agris; Yuliana, Margaretha Tri Budi
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11388

Abstract

ABSTRACT The presence limestone can be used as biomaterial for bone support. CaCO3 as matrix biocomposite and bioplastic as reinforce. This work aimed to study the effect of suspension CaCO3 and corn starch as bioplastic in mechanical properties such as tensile strength, flexural strength, shrinkage and also microstructure. The ratio composition of suspension CaCO3 : Corn Starch namely is 20:80 (w/w)%, 30:70 (w/w)%, 40:60 (w/w)%, 50:50 (w/w)% . The dimensions of the tensile test specimen are in accordance with the ASTM D638 type 4 standard, and the dimensions of the flexural test specimen are in accordance with the ASTM D790 standard. Samples are given codes such as specimen A code for composition 20:80 (w/w)%, specimen B code for composition 30:70 (w/w)%, specimen C code for composition 40:60 (w/w)%, and specimen code D for composition 50:50 (w/w)%. Based on the results of the shrinkage measurement, it showed that specimen B had the highest average shrinkage value of 180.011% for the tensile test specimen, and 160.022% for the flexural test specimen. The results of the tensile test and flexural test also showed that specimen B had the highest average value, namely the ultimate tensile strength of 0.110.015 MPa and flexural strength of 0.020.012 MPa. Meanwhile, from the microstructure test, namely SEM-EDX, the results were in the form of a spheroid-shaped specimen morphology and the dominant elements contained in the specimen were C, N, O, and Ca.
Pengaruh Infill Type Hasil Cetak 3D Printer Terhadap Sifat Mekanik Material Berbahan Polylactic Acid (PLA) Setiawan, Agris; Maharani, Intan; Probowati, Dyah
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10258

Abstract

The development of a quality product to get good results requires a technology, one of which is the use of 3D printing machines. One type of material that is most often used in the 3D Printer process is Polylactic acid (PLA). The results of the 3D Print must be carried out several tests, such as tensile, shrinkage, and flexural tests to find out how strong the specimen is to withstand the load that will be given. One of the factors that affect the tensile, shrinkage and flexural test results of the 3D Printer is the type of filler (pattern). Therefore, in this study, 3 types of tests will be carried out on variations in the infill type, namely triangle, concentric and gyroid. Specimen design was made using Autodesk Inventor software with reference to the standard dimensions of ASTM D638 Type IV for tensile testing of specimens and standard dimensions of ASTM D790 for flexural tests of specimens. Samples are characterized by using specimen code A, specimen B and specimen C. For example, specimen code A is the code for specimens with an infill gyroid, specimen B is a code for specimens with a concentric infill type and specimen code C is a code for specimens with an infill. triangle type. Results Based on the shrinkage measurements on the tensile test specimen and the flexural test specimen, it was found that specimen C had a fairly large shrinkage value compared to other specimens, namely 2.210.97% and 20.21%. The results of the tensile test also showed that specimen C had a higher ultimate tensile strength than the other specimens, which was 39.230.93 MPa. Based on the results of the flexural test that has been carried out, it can be seen that the highest flexural strength value is found in specimen C, which is 48.693.17 MPa. While the results of the porosity of the specimen showed that specimen C had a smaller porosity than the porosity of other specimens. Based on the 3 types of specimen variations, it can be said that specimen C has better strength and resistance values than other specimens.
Co-Authors Ahmad Salman Taufiqi Firas Aurelo Wimitya Dyah Probowati, Dyah Herodes Eka Putra Tambunan Maharani, Intan Mirahati, Riria Zendy Muhamad Alfa Rizky Rizal Riady Akmal Untung Sukamto Wahyuningsih, Fransisca Diana Yuliana, Margaretha Tri Budi