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Journal : Jurnal Polimesin

Investigation of the acoustic behavior of oil palm (Elaeis guineensis) frond fiber at various weights Tajuddin, Tajuddin; Husaini, Husaini; Suhaeri, Suhaeri
Jurnal Polimesin Vol 23, No 5 (2025): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i5.7638

Abstract

The increasing demand for sustainable materials in noise control applications has driven interest in natural fiber-based sound absorbers. This study investigates the potential of oil palm frond fiber (Elaeis guineensis) as an alternative to synthetic acoustic materials. The fibers were extracted, dried, and hot-pressed at 200°C into 100 mm × 10 mm cylindrical samples with varying weigh of 20–60 g. Pore morphology and composition were analyzed using SEM–EDX, while sound absorption coefficients (α) were measured using an impedance tube (ISO 10534-2) across 125–4000 Hz. SEM–EDX results revealed a highly porous structure dominated by carbon (57.5%) and oxygen (41%), confirming the organic nature of the fibers. The material exhibited strong absorption in the mid- to high-frequency range (500–4000 Hz), with α = 0.99 at 4000 Hz and a maximum NRC of 0.89 at 50 g. Optimal performance occurred at 40–50 g, with α 0.95 between 500 and 2000 Hz, while low-frequency absorption (250 Hz) remained limited (α = 0.1–0.6). Overall, oil palm frond fiber demonstrates significant potential as a low-cost, biodegradable, and sustainable acoustic material for medium- to high-frequency applications, such as interior acoustic panels and building insulation systems.
Effect of Perforated Aluminum on Calotropis Gigantea Fiber Material’s Ability to Absorption Sound suhaeri, suhaeri; Husaini, Husaini; Dirhamsyah, Muhammad; Hasanuddin, Iskandar
Jurnal Polimesin Vol 22, No 4 (2024): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i4.5245

Abstract

Plants fibers such as Calotropis gigantea (CG) are very suitable as noise reduction material. Therefore, this research aims to determine the sound absorption coefficient of CG in the 20 mm test sample and the effect of the perforated aluminum layer on its ability. It was carried out using a test sample made with a thickness of 20 mm and 100 mm in diameter. The thickness of aluminum was 0.3 mm with hole diameters of 1 mm, 1.5 mm, and 2.5 mm. During the experiment, every sample was heated and pressed in a mold for 10 minutes at 200oC. The test equipment used is a Bruel Kjaer Type 4206 impedance tube with 100 mm in diameter. The sample was tested using the transfer function method ISO 10534-2:1998 at a frequency of 1/1 octave. The results indicated that the uncoated sample absorbed noise α = 0.01-0.07 (1-7)% higher than the sample coated with perforated aluminum. This showed that the Noise Reduction Coefficient (NRC) without aluminum coating can reduce noise by 29%, and the measured sample is categorized in class D.
Structural failure study of truck rear wheel drive axle with defect variation using finite element method Husaini, Husaini; Rizki, Ulil; Ali, Nurdin
Jurnal Polimesin Vol 22, No 6 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i6.5886

Abstract

A truck is a major form of transporting goods on land because of its efficiency in terms of cost and effectiveness. Increased truck usage has heightened the risk of component failure, particularly in the rear-wheel-drive axle, which is prone to structural problems. Therefore, this study aimed to analyze the causes of rear-wheeldrive axle failure in trucks through numerical simulations based on the finite element method, using Finite Element Modeling and Postprocessing (FEMAP) software. The axle material used was AISI 4140, with four test models, including a version without defects and three other models with variations in defects at certain locations. During the investigation, the analysis was conducted to observe the effect of stress on axle performance under various defect conditions. The simulation results showed the maximum von Misses stress on the shaft without defects reached 115.19 MPa, which was significantly lower than the yield strength limit of 415 MPa of the material. The maximum shear stress of 124.67 MPa also remained lesser compared to the material allowable limit of 239.45 MPa, showing that the shaft was safe in a condition without defects. However, in the shaft model with defects, stress intensity factor (KI) values were recorded at 17.80, 15.01, and 20.325 MPa.m1/2, which exceeded the material fracture toughness (KIC) value of 10 MPa.m1/2. The results signified that KI KIC condition, facilitating accelerated crack propagation on the shaft, showing the potential for structural failure. This study provided a deep understanding of the importance of defect mitigation to maintain the reliability and safety of truck operations
Analysis of Helical Gear Failure in Off-Road 4x4 Gearbox Husaini, Husaini; Darmawan, Haris; Ali, Nurdin -
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4648

Abstract

Surface failure is evident in helical gear in off-road 4x4 gearbox,requiring the identification ofroot causes.Therefore, this study aimed to explore the factors contributing to helicalgearfailure in off-road 4x4 vehicles. Initially, crack in helical gear wascaused by manufacturing or material defects during production or the heat treatment process, manifesting as inhomogeneities in the microstructure or other imperfections. Crack propagation possibly occurred due to continuous stress during off-road 4x4 usage, influenced by factors such as excessive loads, vibrations, or extreme off-road conditions.The exploration process began with a comprehensive set of analyses, including visual observation, hardness testing, chemical composition analysis, microstructure testing, and stress analysis. Subsequently, the material composition of gear was identified as high-carbon steel meeting AISI 1080 standards. Although the average surface hardness value was 95.49 HRB, which was slightly lower than AISI 1080, the microstructure comprised pearlite and cementite. Surface fracture observations revealedinitial crackthat propagated, leading to brittle fractures. The average stress intensity factor (KI)was alsomeasured 54.65 MPa.m1/2, which surpassed fracture toughness value (KIC) of AISI 1080 steel at 45.5 MPa.m1/2.In conclusion, helical gear failure was directly attributed to the propagation of initial crack, thereby resulting in fractures.
Effect of Scirpus grossus fiber density on acoustic absorption characteristics for insulation use Suhaeri, Suhaeri; Husaini, Husaini; Dirhamsyah, Muhammad; Hasanuddin, Iskandar; Tajuddin, Tajuddin
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.7012

Abstract

Noise control is essential for achieving comfortable living and working environments. Natural fibers such as Scirpus Grossus offer a sustainable approach for sound absorption applications. This study investigates the effect of varying fiber densities of Scirpus grossus on sound absorption performance. Test specimens were fabricated at three density levels; 636.9 kg/³, 318.5 kg/m³, and 212.3 kg/m³. Each had a fixed mass of 50 grams, a diameter of 100 mm, and varying thicknesses of 10 mm, 20 mm, and 30 mm. The samples were hot-pressed at 200°C for 10 minutes. Sound absorption coefficients (SACs) were measured using a Brüel Kjær Impedance Tube Type 4206, following the transfer function method (ISO 10534-2:1998) over third-octave bands. The results show that fiber density significantly affects the sound absorption coefficient (SAC). A decrease in density to 212.3 kg/m³ led to a SAC increase of 0.12 points (approximately 20% relative to the initial SAC value of 0.5428 at 636.9 kg/m³), particularly at 4000 Hz. This indicates that lower-density samples exhibit better acoustic absorption behavior. The average Noise Reduction Coefficient (NRC) across all samples was around 45%, confirming their effectiveness in sound control. Based on SAC values, the samples are classified as Sound Absorption Class D. These findings suggest that Scirpus grossus fiber mats have strong potential for eco-friendly acoustic insulation materials, suitable for applications in building panels or vehicle interiors.
Co-Authors . Zulfan Abdul Azis Abdullah Abdullah Abdullah, Mhd Rajabil Fahmi Abdulrahman, Abdulrahman Adhimullah, Adhimullah Adi Nugroho Afrizal Afrizal Akbar, Devin Akbar, Mufid Akbar, Mufti Aldiansyah Akbar Alfairus, Nanda Ali Ibrahim ALI, NURDIN Ali, Nurdin - Alrizal, Fauzan Ameraldo, Fedi Amiruddin Amiruddin Amri Amri Ananda, Ferdika Anggara, Ari Antoni, Angga Anwar Anwar Anwar Thaib Arhami, Arhami Arhami, Muhammad Arifa, Risma Ariga, Kanda Ariyanti, Rini Arlina Arlina, Arlina Armelin, Armelin Aswandi Aswandi, Aswandi Atika, Rulia Atthariq, Atthariq AUDITYA, LUCY Aziza, Nurna Aziza, Vinny Baekhaki, Khamid Bakhrum, Bakhrum Balqis, Ratu Boihaqi Christian, F. Yoppie Cut Intan Hayati, Cut Intan Darmawan, Haris Deani, Ani Kipatul Hidayah Deviana, Deviana Dewi Fortuna Dian Ana Mutriqah Diana Suksesiwaty Lubis Dirhamsyah, Muhammad Djalalluddin, Djalalluddin Duffin Edhi, Sarwo Edi Hartoyo Eko Suhartono Elisabeth, Christine Riani Ermina Istiqomah, Ermina Fahrezi, Muhammad Fajarna, Usyur Fakhri, Rizal Falah, Moch. Fajarul Farsiah, Laina Fatimah, Husnul Fauzi Fauzi Fauzie Rahman Fitra, Muhammad Aidil Fitria, Shilmina Fitriyani Fitriyani Fonna, Merry Zuvyanti Fortuna, Karina Dwi Fuadi, Saiful Geubrina, Tiara Ghazali Syamni Hairul Hudaya Hamdani Hamdani Handayani, Sri Happy Fitria, Happy Hardyan Sauqi Hartono, Makmur Haryadi, Donni Hasan, Muttaqin Hasanuddin, Iskandar Hasibuan, Zainul Lian Malik Haviza, Nadya Hayati, Ulfi Helmina, Helmina Herawati Herawati Herlina Herlina Hidayah, Ani Kipatul Hidayah, Ukhti Nurul Hidayat Hidayat Hidayat, Hari Toha Huzaeni, Huzaeni Ihsan Ihsan Ilham Safar Ilyas, Fitrawati imadduddin, Imadduddin Imannisa, Anggya Sophia Indella, Dwi Rahma Indrawati Indrawati Iradhia, Shara Irnando, Teuku Muhammad Detya Istiqamah, Ermina Italina, Cut Izaak Zoelkarnain Akbar, Izaak Zoelkarnain Jaya, Mhd.Imam Judijanto, Loso Julita Jummaini Kamila Saleha, Anis Kartini, Siti Agus Khairunnisa, Nabilah Kharis, Yuliar Khusairi, Juwanda Kishimoto, Kikuo Kurniawan, Erizal Kurniawati, Devy Kushariyadi Kushariyadi Laila Rismawati, Laila Lailatul Fahriyah, Lailatul Laily Khairiyati legito, Legito Lenie Marlinae Lestari, Nadilia Dwi Lismawati, Lismawati Lismula, Riska Julianti Ade Litania, Litania M. Bakhriansyah, M. M. Rizkoni Salis M. Yogi Riyantama Isjoni Magdalena, Dian Maharani, Araya Mahlil, Mahlil Mahyus Ihsan Makawiyah, Makawiyah Marah Halim Maryanti Maryanti Marzuki Marzuki Masri Masri Maulidah, Maulidah Mawardaniah, Mawardaniah Mayang Sari Meitria Syahadatina Noor Mirna Mirna Misbullah, Alim Muakhir, Muakhir Muchtar, Darmawati Muchtar Muhamad Muslim Muhammad Abdan Shadiqi Muhammad Ade Kurnia Harahap Muhammad Agung Muhammad Anggung Manumanoso Prasetyo Muhammad Ediyani Muhammad Husaini Muhammad Luthfi Muhammad Nasir Muhammad Rasyid Ridha Muhammad Reyzaldy Rahim Muhammad Rizki Saputra, Muhammad Rizki Muhammad Siddiq, Muhammad Muhammad Zakaria Muji Endah Palupi, Muji Endah Muliadi Kurdi Muliara, Muliara Mulya, Muhammad Fada Mulyadi Mulyadi Mursyidah Mursyidah Mursyidin Mursyidin Musafaah Musafaah Musdalifah Musdalifah Musdar, Musdar Musran, Musran Muyasaroh N. Nazaruddin Neka Erlyani Nia Kania Nikmah Nikmah Niko, Niko Nizwar, Muhammad Noor Ahda Fadillah Noviana, Verra Novita Sari Novyar Satriawan Fikri, KMS Nugraha, Aditya Dyan Nur Rahmat, Anugrah Nur, Radian Nurasiah Nurasiah Nurhabibi, Nurhabibi Nurhasanah Nurhasanah Nurlela Nurlela Nurul Fadilah, Nurul Ovita Charolina P Midiastuty, Pratana Parlindungan, Harapan Pertiwi, Dinal Eka Pradana, Anjas Putra Pramitasari, Maulida Puspita, Lisa Martiah N Putra, Farhan Phonna Putri, Nurhaliza Putri, Ria Febrianita Putri, Sanni Rizky Qadriah, Laila Rachmi Juwita Raden Mohamad Herdian Bhakti Rafik, M. Rafika, Indah Rafsanjani, Muhammad Ryzka Rahma Ziana Safitri Rahmadani, Yetri Marta Rahman, Auva Fadhlur Rahmat, Anugrah Nur Raju, Mohd. Jaisar Ramadhan, Teuku Hafiez Ramadhani*, Atika Raudhatul Jannah Rawi Juwanda Reza Saputra, Reza Riana*, Ridha Rico Nur Ilham Riesna Apramilda Riska, Luthfia Riski, Reza Rizka Rizka, Rizka Rizki, Marsi Fella Rizki, Riri Rizki, Ulil Robby, Muhammad Romaynoor Ismy, Romaynoor Roselina Panghiyangani Rosihan Adhani, Rosihan Rozal, M. Rizky Rudi, Fachri Yannuar Saidary, Ar Arysy Saifi, Syahriannur Saiful Bahri Saiful Saiful Salahuddin Salahuddin Salasa, Ricco Salat, Junaidi Samsul Hadi Samudera, Vega Ariya Sanduan, Abdullah Santoso, Dimas Sanusi Sanusi Sanyoto, Didik Dwi Saputra, Eno Saputra, Munawar Saputra, Rian Adi Sari Sari Dianita Purnama Sari, Dian Wulan Sari, Nabila Sayed Achmady Sembiring, Asriyani Br Setiawan, Novita Sari Sidik, Raihan Sihombing, Dina Agnesia Silvia Kristanti Tri Febriana Siti Aisyah Solly Aryza Sono, Mohammad Gifari Soviana, Widya Suhaeri Suhaeri, Suhaeri Sulistia, Cieca Tri Suriadi Suriadi Susi Yusrianti, Susi Syahputra, Zulfiadi Agus Syahrianursaifi, Syahrianursaifi Syahrinursaifi, Syahrinursaifi Syahrizal Syahrizal Syamsul Arifin Syamsul Arifin Tajuddin Tajuddin, Tajuddin Tamtama, Tatang Thalal, Muhammad Thariq, Ahmad Tiarasi Berliana Tri Martini Triawanti Triawanti Trisna Soenara, Trisna Turyandi, Itto Tyahya Whisnu Hendratni Ulfa Zahra Ulfahidayati, Ulfahidayati Usman, Darman Uswatun Isnaini Varisha, Tia Verawati, Hasrini Wahyuningratna, Ratu Nadya Wandana, Dio Wardiana, Wardiana Warisno, Mettu Waskito, Agung Wijayanti, Indah Oktari Wydiamala, Erida Yanuar, Fachri Yulianti J, Yulianti Yulianto Dwi Saputro Yulinar Yulinar Yumna, Zelfi Yuniza, Salma Zaimuddin, Zaimuddin Zainuddin, Zainuddin Zairin Noor Zoelkarnain, Izaak Zoriton, Zoriton Zuhaimi Zuhaimi Zuhriansyah, Teuku Fajar Zukri, Melli Zulchairi, Zulchairi Zulchairi, Zulchairi Hidayat S.Kom. Zulfa Razi Zulfikar Ali Buto