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All Journal JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Infotekmesin Jurnal Pengabdian West Science Jurnal Pendidikan Teknik Mesin Jurnal Pendidikan Teknik Mesin
Kriswanto
Universitas Negeri Semarang
Humanities Automotive Engineering Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Public Health Social Sciences Other

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Servis Jitu dan Hemat (JIMAT) Sepeda Motor Himpro Teknik Mesin FT UNNES 2024 Ranu Iskandar; Rizqi Fitri Naryanto; Rahmat Doni Widodo; Kriswanto; Abdillah Habib Al Misbah; Muh. Abiyyu Hafizh; Bakti Laksono; Devi Aisa Fitri; Muh. Winarno Burhanudin; Nadhiva Qothrunnada; Ja'far Faris Nashiruddin; Muh. Rizki Ivan Setiawan; Maharudin Wira Pratama; R. M. Rois Alwidad; Dzaky Riyavika Prasetyo; Andra Andika Putra; Muh. Ridwan Prananda; Ajhi Bangun Priambudi; Dian Refiana; Satria Bayu Segoro
Jurnal Pengabdian West Science Vol 3 No 06 (2024): Jurnal Pengabdian West Science
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/jpws.v3i06.1206

Abstract

Masifnya penggunaan sepeda motor membuat polusi dan tingkat kecelakaan meningkat sehingga perlu adanya upaya bersama untuk menurunkan dampak tersebut. Kegiatan Himpro Teknik Mesin ini bertujuan untuk menservis sepeda motor agar kembali ke performa terbaiknya. Tahapan kegiatan yang dilakukan yaitu: (1) Persiapan, (2) Sosialisasi Kegiatan, (3) Pelaksanaan, (4) Evaluasi, dan (5) Pelaporan. Hasil kegiatan ini menunjukkan bahwa 264 unit sepeda motor telah dilakukan servis pada tanggal 7-8 Mei 2024 di Halaman Masjid Ulul Al Bab UNNES. Garansi diberikan 1x24 jam setelah selesai servis. Namun sampai dengan selesainya hari kedua tidak ada keluhan dari customer sehingga sepeda motor yang diservis benar-benar sudah tepat. Artinya semua servis yang dilakukan membuat customer puas.
Characterization of HDPE Waste-Bentonite Clay-Jute Fiber Composite Materials: Impact Strength and Density Analysis Thoriq Bintang Fadillah; Kriswanto; Kaleb Priyanto; Immanuel Eltian Sudjana
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.15732

Abstract

This study evaluates composite materials' impact strength and density from recycled high-density polyethylene (HDPE) waste reinforced with woven jute fibers and filled with bentonite clay at varying volume fractions (2%, 4%, 6%, and 8%). The composites were fabricated using a hot press molding technique. Density was measured following ASTM D792, while impact strength was assessed using the unnotched Charpy method based on ISO 179. Results showed that increasing bentonite content raised the composite's density due to the higher specific gravity of the clay. Impact strength exhibited a non-linear behavior, peaking at 4% bentonite with a 13.5% increase compared to the 2% variant. However, further increases in clay content led to a significant drop in impact strength, primarily due to filler agglomeration and reduced matrix-fiber interfacial bonding, which resulted in brittle fracture modes. Macro-photographic analysis of fracture surfaces confirmed this trend, revealing ductile failure, fiber pullout at low clay contents, and sharp, brittle fractures at higher contents. These findings highlight the importance of optimizing filler content to balance density and mechanical performance, offering insights for developing sustainable composite materials for structural and industrial applications. Keywords: recycled HDPE, natural fiber composite, bentonite clay, impact strength, density
Effect of Eggshell Waste Filler Content on Impact Strength and Physical Properties of Jute Fiber Reinforced Recycled HDPE Composites Ikhsan Eka Pramudya; Kriswanto; Kaleb Kaleb Priyanto; Muhammad Eka Rizky Ramadhan
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.15739

Abstract

This study investigates the influence of eggshell waste-derived calcium carbonate (CaCO₃) filler content on the impact strength and density characteristics of jute fiber reinforced recycled high-density polyethylene (r-HDPE) composites. The research addresses the dual challenge of plastic waste management and agricultural waste utilization by developing sustainable composite materials suitable for automotive applications. Eggshell waste was mechanically processed to produce CaCO₃ filler particles passing through 300-mesh screens, while r-HDPE was sized to pass through 50-mesh screens. Jute fibers in plain weave configuration were subjected to alkaline treatment using 5% NaOH solution to enhance fiber-matrix adhesion. Composite specimens were fabricated using compression molding technique with CaCO₃ filler content varied systematically at 0%, 2%, 4%, 6%, and 8% by volume fraction. Impact testing was conducted according to ISO 179 standards using Charpy impact testing, while density measurements followed ASTM D 792 procedures. Macroscopic failure analysis was performed through stereomicroscopic examination of fracture surfaces. The results revealed complex relationships between filler content and mechanical performance. The addition of 2% CaCO₃ produced marginal impact strength improvement of 0.5%, while higher filler loadings of 4%, 6%, and 8% resulted in progressive deterioration of 1.1%, 1.8%, and 1.9% respectively compared to the baseline composite. Density measurements showed systematic increases of 5.1%, 13.2%, 16.3%, and 23.2% for 2%, 4%, 6%, and 8% CaCO₃ content respectively, confirming successful filler incorporation. Macroscopic failure analysis revealed a transition from ductile to brittle fracture behavior with increasing filler content, characterized by reduced fiber pull-out lengths and cleaner fracture surfaces. The findings indicate that while eggshell-derived CaCO₃ offers environmental benefits through waste utilization, optimal mechanical performance requires careful control of filler content and surface modification strategies to achieve effective particle-matrix compatibility in sustainable composite systems
Design and Implementation of a 3-Phase Induction Motor Controller Simulator Using Programmable Logic Controller (PLC) and Human Machine Interface (HMI) Integration Kaleb Priyanto; Immanuel Eltian Sudjana; Hans Nashirudin Almay; Kriswanto; Haikal; Sarai Enita
Infotekmesin Vol 17 No 1 (2026): Infotekmesin: Januari 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v17i1.2750

Abstract

This study was conducted as a response to the limited availability of practical learning tools in industrial automation education and training. In this research, a three-phase induction motor control simulator was designed and developed by integrating a Programmable Logic Controller (PLC) and Human Machine Interface (HMI) system. The main objective is to enhance learners' understanding and practical skills in designing and operating industrial control and automation systems through an interactive learning approach. The development process involved designing the system architecture using an Omron CP2E PLC and NB-series HMI, electrical integration, ladder diagram programming, and user interface development. The simulator was then tested to ensure its proper functionality and effectiveness in supporting the learning process. The results demonstrate successful system integration, reliable control logic, and an intuitive user interface via the HMI. This research contributes a structured and cost-effective educational tool that is well-suited for automation engineering and technical training programs.
PENGEMBANGAN MEDIA INTERAKTIF ANDROID UNTUK MATERI PENGELASAN GMAW Teknik 1F DAN 2F DI SMK Lu'ni Maulana; Ari Dwi Nur Indriawan Musyono; Basyiruno; Kriswanto
Jurnal Pendidikan Teknik Mesin Vol. 12 No. 2 (2025): Jurnal Pendidikan Teknik Mesin
Publisher : Program Studi Pendidikan Teknik Mesin Fakultas Keguruan dan Ilmu Pendidikan Universitas Sriwiajaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jptm.v12i2.259

Abstract

Penelitian ini bertujuan untuk mengembangkan dan menguji kelayakan media pembelajaran interaktif berbasis Android pada materi Gas Metal Arc Welding (GMAW) posisi 1F dan 2F untuk siswa SMK. Metode yang digunakan adalah Research and Development (R&D) dengan Four-D model yang meliputi tahap Define, Design, Develop, dan Disseminate. Media dikembangkan dalam bentuk aplikasi Android yang memuat petunjuk penggunaan, materi pembelajaran, dan kuis evaluatif. Validasi oleh dua ahli materi dan dua ahli media menunjukkan bahwa media berada dalam kategori “sangat layak” dengan skor kelayakan rata-rata 82% dan skor kepraktisan 78,2%, yang termasuk kategori “praktis”. Hasil uji coba menunjukkan bahwa media ini membantu meningkatkan pemahaman siswa serta dapat digunakan secara mandiri tanpa koneksi internet. Dengan demikian, media ini dinilai efektif dalam meningkatkan keterlibatan dan hasil belajar siswa, serta relevan untuk diterapkan dalam pembelajaran vokasi berbasis teknologi.
FINITE ELEMENT STUDY ON ANGULATED ABUTMENTS IN MAXILLARY POSTERIOR DENTAL IMPLANTS Fadhil Putra Ramadhan; Kriswanto; Kaleb Priyanto; 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.v26i01.29582

Abstract

Dental implants in the posterior maxilla often require angulated abutments due to anatomical limitations. However, increased abutment angulation may influence stress distribution and compromise mechanical integrity. This study aimed to evaluate the biomechanical behavior of implant components with 15°, 17°, and 20° abutment angulations using three-dimensional finite element analysis (FEA). A static vertical load of 276 N was applied to a D4-type bone block model. Results showed that higher abutment angles led to increased von Mises stress and strain, particularly on the abutment U-profile and the screw head. Despite the rising stress, all configurations maintained safety factors above 1.5. These findings indicate that angled abutments up to 20° are mechanically safe under axial loading conditions, supporting their use in clinically challenging posterior maxillary regions.
FIXTURE DIAMETER INFLUENCE ON BIOMECHANICAL PERFORMANCE OF DENTAL IMPLANT ABUTMENT AND SCREW: A 3D FEA STUDY Rachael Andika; Kriswanto; Khoirul Huda; 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.v26i01.29583

Abstract

Dental implant stability hinges on fixture design, particularly diameter, influencing biomechanical performance. This study evaluates the impact of fixture diameter on von Mises stress, strain, and factor of safety in the abutment and screw of posterior dental implants using finite element analysis. A three-dimensional model of a mandibular first molar implant was developed with fixture diameters of 3.75, 4.0, and 5.0 millimeters, using Ti-6Al-4V and static loading simulating maximum voluntary clenching (177.38 N). Results show that the 5.0-millimeter diameter with a wider abutment reduces stress by 23.7 percent in the abutment and 33.9 percent in the screw, strain by 23.7 and 33.1 percent, respectively, and improves factor of safety, compared to 3.75 millimeters. The 5.0-millimeter diameter optimizes biomechanical stability, enhancing long-term implant success in posterior mandibular applications.
Biomechanical Evaluation of Implant Angulation on the First Mandibular Premolar: A 3D Finite Element Study Andrean Rachman Rizaldy; Kriswanto; Septian Eko Cahyanto; 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.v26i01.29780

Abstract

The design and orientation of dental implant connections play a critical role in biomechanical success, particularly in the posterior mandibular region, which is subjected to high occlusal loads. This study aims to evaluate the effect of varying abutment angulations (0°, 15°, and 25°) on stress distribution, strain, and safety factor in a reverse-buttress implant system using the Finite Element Analysis (FEA) approach. A 3D implant model was simulated within an idealized bone block using ANSYS software, applying a physiological static load of 240 N. The results showed that increasing abutment angulation significantly elevated both maximum stress and strain, particularly in the screw component, which experienced a peak stress of 455.89 MPa at 15°. The safety factor, calculated based on the yield strength of titanium grade 5 (880 MPa), decreased from 14.18 (0° abutment) to 2.94 (25° abutment). Although all configurations remained within safe limits (>1.5), the axial (0°) configuration demonstrated the most stable load distribution and the highest safety margin. This study underscores the importance of considering abutment angulation in implant planning and supports the use of safety factor–based FEA as a predictive tool for assessing implant structural safety.
FIRST MANDIBULAR MOLAR IMPLANT SYSTEM UNDER ORTHOTROPIC BONE VARIATIONS: A FINITE ELEMENT SENSITIVITY ANALYSI Fatkhu Amanulloh; Kriswanto; Ruben Bayu Kristiawan; Jamari; Athanasius Priharyoto Bayuseno; Dhiaulhaque; Dzikra Adi Pratama; Mohd Syahmi Jamaludin
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.v26i01.54256

Abstract

Physiological variability in bone mechanical properties may affect load transfer and biomechanical stability in dental implant systems. However, the influence of orthotropic elastic and shear properties on implant–bone biomechanics remains unclear. This study evaluated the sensitivity and robustness of a mandibular first molar implant system to variations in orthotropic bone properties using finite element analysis. A three-dimensional implant–bone model was analyzed under nine material configurations, including gradual orthotropic variations (±15% of baseline) and independent modifications of the elastic and shear modulus. Biomechanical responses were evaluated using von Mises stress, principal stresses, strains, and displacements. Stress concentrations were primarily located at the implant–abutment connection and crestal cortical bone, indicating the main load-transfer pathways. Increasing directional stiffness reduced peri-implant strain and displacement but increased cortical stress, revealing a trade-off between deformation reduction and local stress concentration. Elastic modulus predominantly influenced global stress redistribution, whereas shear modulus had a greater effect on local deformation and peri-implant stability. Strain and displacement were more sensitive to material variations than stress-based parameters. These findings emphasize the importance of orthotropic material representation for realistic biomechanical assessment of dental implant systems under physiological variations in bone quality.
COMPARATIVE BIOMECHANICAL ANALYSIS OF POSTERIOR MANDIBULAR PREMOLAR IMPLANTS: EFFECTS OF MATERIAL MODELING, CONTACT CONDITIONS, AND LOADING DIRECTION Dennis Andhara Putra; Kriswanto; Khoirul Huda; Jamari; Athanasius Priharyoto Bayuseno; Dhiaulhaque; Nurul Fatulloh; Mohd Syahmi Jamaludin
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.v26i01.54363

Abstract

Posterior tooth loss in the mandibular region may reduce masticatory performance and compromise biomechanical stability, thereby requiring predictable and well-designed implant rehabilitation strategies. This study evaluates the mechanical behavior of an implant–bone system by considering variations in bone material representation (isotropic and orthotropic models), implant–bone interface conditions (fully bonded and frictional contact), and loading orientations (axial and oblique) through a validated three-dimensional finite element analysis (3D-FEA) framework. A full factorial design comprising eight simulation configurations was implemented to assess 15 biomechanical output parameters, including von Mises stress, principal strain, and displacement across implant components and surrounding cortical and cancellous bone tissues. The results indicate that the biomechanical response of the system is strongly dependent on both structural components and loading context. The orthotropic bone model tends to increase stress and deformation responses under specific conditions, whereas oblique loading generally produces higher peak mechanical responses than axial loading. Furthermore, the influence of contact conditions is not uniform but varies according to material assumptions and loading direction, suggesting that simplified fully bonded interfaces may not fully capture realistic implant–bone interactions. Overall, the findings highlight the importance of incorporating anisotropic bone behavior, realistic interface modeling, and clinically relevant loading directions to improve the accuracy of stress prediction around dental implants. This study provides numerical evidence that may support improved implant design strategies and enhance the reliability of future finite element–based biomechanical investigations. 
Co-Authors Abdillah Habib Al Misbah Ajhi Bangun Priambudi Alifian Bagas Saputra Andra Andika Putra Andrean Rachman Rizaldy Ari Dwi Nur Indriawan Musyono Athanasius Priharyoto Bayuseno Athanasius Priharyoto Bayuseno Bakti Laksono Basyiruno Dennis Andhara Putra Devi Aisa Fitri Dhiaulhaque Dhiaulhaque Dian Refiana Dzaky Riyavika Prasetyo Dzikra Adi Pratama Fadhil Putra Ramadhan Fatkhu Amanulloh Haikal Hans Nashirudin Almay Hastaka Juan Pratama Putra Ikhsan Eka Pramudya Immanuel Eltian Sudjana Iskandar, Ranu J. Jamari Ja'far Faris Nashiruddin Jamari Jamari Kaleb Kaleb Priyanto Khoirul Huda Lu'ni Maulana Maharudin Wira Pratama Mohd Syahmi Jamaludin Mohd Syahmi Jamaludin Muh. Abiyyu Hafizh Muh. Ridwan Prananda Muh. Rizki Ivan Setiawan Muh. Winarno Burhanudin Muhammad Eka Rizky Ramadhan Nadhiva Qothrunnada Nurul Fatulloh Priyanto, Kaleb R. M. Rois Alwidad Rachael Andika Rizqi Fitri Naryanto Ruben Bayu Kristiawan Sarai Enita Satria Bayu Segoro Septian Eko Cahyanto Septian Eko Cahyono Thoriq Bintang Fadillah