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All Journal Journal of Sciencce Technology and Visual Culture Jurnal Pendidikan Teknik Mesin
Febri Budi Darsono
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Arts Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Mechanical Engineering

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Pengaruh Variasi Fraksi Volume Terhadap Kekuatan Tarik Komposit Berpenguat Gabungan Serat Pelepah Pisang dan Serat Daun Nanas Fajar Paundra; Zuhdi Zainul Muttaqin; Fajar Perdana Nurullah; Eko Pujiyulianto; Febri Budi Darsono
Journal of Science, Technology, and Visual Culture Vol 2 No 2 (2022): Juli 2022
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

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Abstract

Composite fiber composite is the process of making composites using 2 or more kinds of fibers as reinforcement. The choice of fiber and the volume fraction between fibers greatly affect the strength of a composite. So, it is necessary to do further research on the effect of volume fraction variations of banana midrib fiber and pineapple leaf fiber on the strength of the composite. This study aims to identify the effect of volume fraction variations of the combined banana midrib and pineapple leaf fiber on the tensile strength and flexural composites. The composite manufacturing process is carried out by the compression molding method. With variations in volume fraction of banana midrib fiber and pineapple leaf fiber, respectively 10:20, 12.5:17.5, 15:15, 17.5:12.5 and 20:10. After the molding process, the density calculation, tensile test and bending test are carried out. The results of the characterization that have been carried out show that the highest tensile strength value is in the volume fraction variation of 20:10 of 26.55 MPa and the highest value of tensile strength is obtained at the volume fraction variation of 12.5:17.5 of 66.63 MPa.
Effect of Implant Diameter on Biomechanical Response of Straight Multi-Unit Abutments in Mandibular All-on-3: A 3D Finite Element Study Muhammad Iqbal Ramadhani; Kriswanto; Febri Budi Darsono; Rahmat Doni Widodo; J. Jamari; Athanasius Priharyoto Bayuseno
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.30115

Abstract

This study evaluates the biomechanical performance of varying implant fixture diameters in mandibular edentulous rehabilitation using the All-on-3 concept with straight multi-unit abutments. A three-dimensional finite element model of a mandible segment was constructed and subjected to static occlusal loading conditions derived from clinical bite force data. Three Brånemark-type implants with diameters of 3.75 mm, 4.0 mm, and 5.0 mm were analyzed using ANSYS Workbench to assess von Mises stress, equivalent strain, and factor of safety (FOS) in abutment and screw components. The results revealed that increasing the fixture diameter to 5.0 mm reduced von Mises stress by 12.8- 15.0% in abutments and 17-44.3% in screws across anterior and posterior positions. Similarly, strain decreased by up to 11.1% in abutments and 45.0% in screws. The highest FOS (37.48 for abutment, 25.09 for screw) was recorded at the 5.0 mm diameter, confirming enhanced safety margins. However, posterior implants experienced stress transfer from abutment to screw components as diameter increased, particularly due to local stiffness mismatch and cantilever effects. While all configurations remained below Ti-6Al-4V yield strength, the posterior 3.75 mm setup yielded the lowest FOS (1.45), suggesting a higher mechanical risk. These findings emphasize the need for careful diameter selection in posterior All-on-3 designs.
Co-Authors Athanasius Priharyoto Bayuseno Eko Pujiyulianto Fajar Paundra Fajar Perdana Nurullah J. Jamari Kriswanto Muhammad Iqbal Ramadhani Rahmat Doni Widodo Zuhdi Zainul Muttaqin