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All Journal Jurnal Agroindustri JURNAL KAJIAN TEKNIK MESIN Metalik: Jurnal Manufaktur, Energi, Material Teknik
Yovial Mahyoedin
Universitas Bung Hatta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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USAGE OF CANDLE NUT SHELL WITH POWDER SIZE OF D Yovial Yovial; Wenny Marthiana; Duskiardi Duskiardi; Habibi Habibi
Jurnal Agroindustri Vol. 7 No. 1 (2017)
Publisher : BPFP Faperta UNIB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/j.agroindustri.7.1.56-62

Abstract

Recently around 60% of the hazelnut shell has the potential to become wasted material. The purpose of this research is to exploit waste hazelnut shell by examining the mechanical properties of composite   from the powder of hazelnut shell. Epoxy resin acts as a matrix mixed with a hazelnut shell powder as a filler with a composition of 20%, 30% and 40% wt. Both materials are mixed using a mechanical mixer with varying speed and stirring times. The resulting composite material is then tested by tensile, impact and hardness testing. The Taguchi method is used to optimize forming process parameters of the epoxy-powder hazelnut shell composite. Research shows that the forming process parameters give different effects for each different mechanical property. Research found out maximum tensile strength of composite material at 30% wt of powder hazelnut shell. Overall, the result of taguchi optimization for the forming process parameters in this study was 43.68 N/mm2 for tensile strength, 0.074 106 J/mm2 for impact strength and 98.57 SHN for hardness.Keywords: .
Kaji Eksperimental Kekuatan Tarik dan Kekuatan Impak Komposit Serbuk Sabut Kelapa-Polyster Fauzan; Yovial Mahjoedin; Wenny Marthiana; Duskiardi; Iqbal
METALIK : Jurnal Manufaktur, Energi, Material Teknik Vol. 1 No. 2 (2022): Metalik: Jurnal Manufaktur, Energi, Material Teknik
Publisher : Universitas Muhammadiyah PROF. DR. HAMKA Fakultas Teknik – Program Studi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/metalik.v1i2.9765

Abstract

Penelitian ini bertujuan menentukan kekuatan tarik dan kekuatan impact komposit dengan penguat serbuk sabut kelapa ukuran >75 mm dengan matriks polyester. Bahan yang digunakan merupakan komposit dengan komposisi resin dan serbuk masing-masing 80%:20%, 70%:30%, 60%:40%. Kedua bahan dicampur dengan kecepatan 150 rpm menggunakan pencampur mekanik selama 10 menit. Standar ASTM D638-02 untuk uji tarik dan ASTM D265 untuk uji impak digunakan dalam pengujian sifat mekanik bahan. Hasil pengujian menunjukkan komposisi 60%:40% memiliki energi impak tertinggi sebesar 78,54 J, dan energi impact terendah pada komposisi 70%:30% sebesar 46,43 J. Hasil yang mirip ditunjukkan oleh kekuatan tarik bahan, dengan nilai tertinggi pada komposisi 70%:30% sebesar 15,31 N/mm2 dan nilai kekuatan tarik terendah pada komposisi 60%:40% sebesar 11,67 N/mm2.
Investigasi Eksperimental Pengaruh Variasi Jenis Pelumas dan Kecepatan Putar Motor Terhadap Reduksi Diameter Kawat Titanium Murni Komersial Pada Proses Penarikan Kawat Iqbal; Yovial Mahyoedin; Iman Satria; Agil Pebri Saputra
METALIK : Jurnal Manufaktur, Energi, Material Teknik Vol. 5 No. 1 (2026): Metalik: Jurnal Manufaktur, Energi, Material Teknik
Publisher : Universitas Muhammadiyah PROF. DR. HAMKA Fakultas Teknik – Program Studi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/metalik.v5i1.24527

Abstract

Commercially pure titanium (CP-Ti) has the potential as an alternative material for orthodontic wires due to its combination of high biocompatibility, good corrosion resistance, and mechanical characteristics that support clinical applications. This study aims to analyse the effect of different types of lubricants on the mechanical properties of titanium wire processed through the wire drawing method. The drawing process was carried out using two types of lubricants, namely oil and gomok, under the same diameter reduction conditions. Material characterisation was conducted through wire drawing tests, hardness tests, and microstructure observation to evaluate the effect of lubrication on the results of plastic deformation. The research results show that the use of oil produces a more stable drawing process and better mechanical properties compared to the use of gomok. In addition, effective lubrication can reduce frictional resistance during the deformation process, resulting in better surface quality and structural homogeneity. These findings indicate that the type of lubricant is an important parameter in the titanium wire drawing process and has the potential to improve the final product quality for orthodontic applications.
Co-Authors Afri Rahim Agil Pebri Saputra Duskiardi Duskiardi Fauzan Habibi Habibi Iman Satria Iqbal Jamasri . Kaidir Kaidir Kurnia Harlina Dewi Nando Desilpa Ridho Azhari Rizky Arman Sri Wahyuni Suryadima Suryadima Wenny Marthiana Wenny Marthiana Wenny Marthiana