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All Journal Jurnal Penelitian Saintek Inersia : Jurnal Teknik Sipil dan Arsitektur MEDIA KOMUNIKASI TEKNIK SIPIL Teknik Sipil dan Arsitektur Journal of Degraded and Mining Lands Management U Karst Civil Engineering Journal Jurnal Pensil : Pendidikan Teknik Sipil Journal of Engineering and Applied Technology Journal of Multidisciplinary Applied Natural Science Civil Engineering For Community Development Indonesian Journal of Aerospace
Slamet Widodo
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Transportation Other

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Effect of Steel Fiber on Plastic Hinge Length of Concrete Columns: Buckingham Theory Application . Tavio; Bambang Sabariman; Slamet Widodo
Civil Engineering Journal Vol 10, No 5 (2024): May
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2024-010-05-03

Abstract

The accuracy of designing the performance of concrete structures nowadays not only depends on the use of standard materials (cement, sand, and gravel) for certain concrete strengths but also on the accuracy of using additional materials for concrete, such as steel fiber. The use of steel fiber not only can improve the performance of concrete structures to behave in a ductile manner but can also form plastic hinges according to design purposes. The design of the axial load of Pa=0.121.Ag.f'c is based on the prediction of the column’s axial capacity. The columns were designed to behave in a flexural manner. As predicted, the lengths of the plastic hinges were found not too long. Controlling the length of plastic hinges in the design of structural concrete members is necessary to avoid excessive displacements. The control is mainly related to the prediction of the plastic hinge length. Thus, in this case, a plastic hinge length formula is required. In the study, the length of the plastic hinges of columns, which are confined with square stirrups and reinforced with steel fiber with Vf = 0%, 0.5%, 1%, 1.5%, and 2%, is proposed. This plastic hinge length formula is proposed after all column test specimens have met the displacement ductility requirement of mD>4, meaning that all test specimens are defined as very ductile. Doi: 10.28991/CEJ-2024-010-05-03 Full Text: PDF
Pembangunan Mushola sebagai Sarana Pendukung Tempat Wisata Taman Goa Jetis-Jatinom, Kabupaten Klaten Fajarwati, Yuli; Suwartanti, Suwartanti; Dewata, Hendra; Nugroho, Maris Setyo; Widodo, Slamet; Batuna, Nerizza Cheryl Salma; Nugraheni, Risa
Civil Engineering for Community Development (CECD) Vol 3, No 2 (2024): Edisi Oktober 2024
Publisher : Department of Civil Engineering Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/cecd.v3i2.29312

Abstract

Desa Wisata Jetis terletak di Kelurahan Jatinom yang memiliki upacara adat bernama Yaa Qowiyyu dan diselenggarakan setiap bulan Sapar. Taman Goa Jetis berada di Kawasan Makam Ki Ageng Gribig yang menjadi tempat berkembangnya Islam di Tanah Jawa. Goa yang terletak diantara dua taman tersebut saat ini dibuka untuk umum dan digunakan sebagai tempat berziarah. Dengan dibangunnya tempat wisata ini, dibutuhkan adanya sarana pendukung salah satunya tempat ibadah. Tujuan PKM ini yaitu pembangunan Mushola sebagai sarana pendukung dari Taman Goa Jetis ini. Pembangunan Mushola ini dilakukan dengan empat tahap, yaitu melakukan analisis masalah dengan mengobservasi lokasi pembangunan Mushola, melakukan perencanaan desain berdasarkan data observasi yang didapatkan, melakukan pendataan material dari desain yang dibuat, dan melaksanakan pembangunan. Pembangunan Mushola ini dilaksanakan oleh keterlibatan masyarakat setempat dan tim PKM. Kendala yang dihadapi selama pembangunan Mushola antara lain mobilisasi material, faktor alam, pengerjaan secara manual, dan keterbatasan alat.
ANALISIS THERMAL STRUKTUR SATELIT BENTUK SILINDER Slamet, Widodo
Indonesian Journal of Aerospace Vol. 8 No. 1 Juni (2010): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

The satellite temperature during its orbit has an extreme value. For this reason, we have to predict the temperature of the satellite structure. A satellite designer needs to analyze the structure temperature based on the heat transfers analysis. Two factorsare needed a view factor and a radiation coupling factor. The thermal distribution on a satellite with cylinder structure under extreme illumination of solar radiation will be analyzed upon its three walls: top, mantle, and bottom of the cylinder.
SIMULASI PANEL SATELIT MIKRO ISOGRIDALUMINA MENGGUNAKAN VISUAL NASTRAN 4D 2001 R2 Slamet, Widodo
Indonesian Journal of Aerospace Vol. 7 No. 1 Juni (2009): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Struktur satelit memerlukan bahan yang ringan namun kuat. Salah satu penyusun struktur adalah lempengan atau plat. Salah satu cara modifikasi plat adalah bentuk isogrid, yaitu plat yang ditipiskan namun diperkuat oleh tulangan yang disebut rib. Makalah ini membahas hasil simulasi isogrid dari bahan aluminium. Simulasi menggunakan software Visual Nastran versi 4D 2001 R2. Hasil simulasi, diharapkan menunjukkan kemampuan isogrid menghadapi beban gaya roket.
Assessing the Magnetic Shielding Effectiveness of Low Carbon Steel, Permalloy, and Mu-metal on Small Satellite Reaction Wheel Assemblies using Finite Element Analysis Susilo, Hogan Eighfansyah; Budiantoro, Poki Agung; Fitrianingsih, Ery; Mayditia, Hasan; Nasser, Eriko Nasemudin; Farmasiantoro, Adi; Fauzi, Ahmad; Slamet, Widodo; Tahir, Andi Mukhtar; Pratiwi, Nindhita
Journal of Multidisciplinary Applied Natural Science Articles in Press
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.354

Abstract

Magnetic cleanliness is essential for small satellites carrying sensitive payloads such as magnetometers and particle detectors. Reaction wheel assemblies (RWAs) represent a primary source of stray magnetic fields, requiring effective shielding under strict mass and volume constraints. This study uses three-dimensional finite element analysis (FEM) in ANSYS Maxwell to evaluate the shielding effectiveness (SE) of high-permeability alloys (Mu-metal and Permalloy 80) and low-carbon steels (AISI 1008/1010) at thicknesses of 1–3 mm, with aluminum 6061-T6 as a non-magnetic baseline, within a cylindrical RWA enclosure geometry. Results reveal a critical design trade-off: High-permeability alloys provide superior attenuation (>65 dB at 100 mm; residual field <150 nT) and high mass efficiency (>700 dB/kg) but saturate at low flux density (0.8 T) and are costly. Low-carbon steels offer moderate SE (34–40 dB) with far higher saturation tolerance (2.2 T), structural robustness, and lower cost. Thickness scaling shows diminishing returns beyond 2 mm for high-permeability materials, whereas steels improve more linearly. Rather than proposing a new shielding concept, this study applies an integrated FEM-based evaluation approach for small satellite platforms to consistently assess shielding effectiveness, nonlinear saturation behavior, thickness scaling, and mass efficiency of candidate materials within a reaction-wheel-representative geometry under identical boundary conditions.
Co-Authors . Tavio Adi Farmasiantoro Agus Santoso Ahmed Wasiu Akande Alamsyah Prawiranegara Aniswara Dewi Bagas Habibilah Bambang Sabariman Batuna, Nerizza Cheryl Salma Budiantoro, Poki Agung Darmono Doni Prakasa Eka Putra Faqih Ma arif Faqih Ma&#039;arif Faqih Ma'arif Faqih Ma'arif Faqih Ma’arif Faqih Ma`arif Faqih Ma’arif Faqih Ma’arif Fauzi Ahmad Muda Fitrianingsih, Ery Galeh Nur Indriatno Putra Pratama Hendra Dewata Hidayat Mahardika M Fajar Amir Maris Setyo Nugroho Mayditia, Hasan Mohamad Tafrikan Mohamad Tafrikan Nasser, Eriko Nasemudin Nugraheni, Risa Nuryadin Eko Raharjo Pratiwi, Nindhita Rifki Alfirahma Sri Haryono Suryatama Ageng Pamuji Susilo, Hogan Eighfansyah Suwartanti Tahir, Andi Mukhtar Teuku Faisal Fathani Wahyu Wilopo Wisnu Rachmad Prihadi Yuli Fajarwati Zhengguo Gao Zhengguo Gao Zhengguo Gao