Penelitian ini dilakukan pada lereng tambang terbuka Pit T PT Bukit Asam Tbk, Tanjung Enim, Sumatera Selatan, dengan tujuan untuk menentukan klasifikasi massa batuan menggunakan metode Rock Mass Rating (RMR) dan Slope Mass Rating (SMR), serta menganalisis kestabilan lereng menggunakan metode kesetimbangan batas Morgenstern-Price pada kondisi statis. Kestabilan lereng merupakan aspek penting dal…
Air–water two-phase flow is a flow phenomenon involving liquid and gas phases flowing simultaneously within a pipe. The characteristics of two-phase flow are influenced by several parameters, such as superficial velocity, pipe orientation, and interfacial interactions that lead to the formation of specific flow patterns. In upward inclined pipes, gravitational effects make the distribution of…
Penelitian ini bertujuan untuk menganalisis pengaruh kecepatan superfisial air dan udara terhadap pola aliran plug, ukuran plug serta menganalisis nilai fraksi hampa pada variasi kecepatan superfisial air 0,7468 m/s – 0,9957 m/s dan kecepatan superfisial udara 0,3288 m/s– 0,6576 m/s. Penelitian dilakukan pada pipa plaxyglass berdiameter 2,54 cm dengan kemiringan 30⁰ ke atas terhadap posis…
Clay soil is a type of soil with very fine grains that have high plasticity and a high water absorption capacity. The shear strength of cohesive soil can be determined through laboratory tests, such as triaxial tests. However, laboratory testing also has drawbacks, such as high costs and lengthy testing times. Regression analysis can be used to establish the relationship between soil shear stre…
Two-phase flow is a flow involving two different fluids flowing simultaneously in a channel. The characteristics of two-phase flow are more complex than single-phase flow because they are influenced by phase interaction, phase distribution, superficial velocity, and friction occurring during the flow process. These interactions cause pressure distribution changes along the pipe and require furt…
Dissimilar welding between carbon steel and stainless steel is widely used in industry because it combines the advantageous properties of both materials. However, differences in the physical and metallurgical characteristics of the two metals can affect the quality of the welded joint. This study aims to analyze the effect of V, X, and K groove variations on the mechanical properties of dissimi…
Soil is a multi-phase material composed of solid particles, water, and air, exhibiting diverse characteristics influenced by its formation process and environment. These characteristics are reflected in its physical, hydraulic, mechanical, and chemical properties. This study aims to analyze the relationship between the physical and hydraulic properties of soil to predict specific soil propertie…
Penelitian pengembangan ini bertujuan untuk mengembangkan e-modul berbasis STEM materi fluida pada konteks air terjun bedegung untuk melatihkan keterampilan berpikir kritis siswa SMA yang valid, praktis, dan efektif. Metode yang digunakan adalah Researchv & Development (R&D) dengan berdasarkan model Rowntree yang mencakup tiga aspek utama yaitu perencanaan, pengembangan, dan evaluasi. Evaluasi …
This study successfully developed augmented reality (AR)-based learning media in the form of flashcards for fluid dynamics material in high school. This study was motivated by challenges in physics education, especially in complex fluid dynamics material, as well as the need to train critical thinking skills as 21st century competencies. A needs analysis conducted on 59 grade XI students at SMA…
Design and development of auxetic bone scaffold with a Negative Poisson’s Ratio (NPR) have become a strategic approach to improving both mechanical performance and nutrient transport in bone tissue engineering applications. Re-entrant Hexagonal Honeycomb (RHH), Double Arrowhead (DAH), and Auxetic Star Shape (ASS) bone scaffold were successfully developed using with Polycaprolactone (PCL) as t…
Kondisi tanah lunak yang sangat tidak mungkin bisa langsung digunakan untuk konstruksi apabila tidak ada perbaikan terlebih dahulu karena kompresibilitas yang tinggi akibat dari konsolidasi tanah yang merupakan pengaruh dari beban diatas tanah lunak. Metode perbaikan tanah lunak yang dilakukan untuk infrastruktur jalan tol yaitu dengan metode vakum konsolidasi. Pemodelan vakum konsolidasi dilak…
Abstrak. Sampah adalah bahan-bahan yang tidak terpakai lagi yang dihasilkan oleh aktivitas manusia, rumah tangga, atau industri. Air lindi merupakan limbah cair yang berasal dari sampah basah atau sampah organik yang terkena air hujan. Pada Tempat Pembuangan Akhir (TPA) Sukawinatan di Kelurahan Sukajaya Kecamatan Sukarami mempunyai Luas ± 25 Ha. Tujuan penelitian ini untuk mengetahui sifat kel…
PT Bukit Asam (Persero) Tbk., a state-owned coal mining company, operates in the Tanjung Enim area of South Sumatra with a Mining Business Permit (IUP) covering 66,414 hectares. Coal extraction is carried out using an open-pit surface mining method, where overburden is excavated and transported to designated waste dump or backfilling areas. The Tanjung Enim Mining Unit (UPTE) consists of three …
Biodegradable foam (biofoam) as a food packaging material is an alternative to conventional styrofoam packaging products that are more environmentally friendly because they can be decomposed naturally so that they do not cause environmental pollution. This experiment aims to determine the effect of the addition of rice husk biosilica in the manufacture of biofoam based on cassava starch and oth…
This study analyzes the effect of groove height and powder inlet angle on the powder output characteristics in the Direct Laser Metal Deposition (DLMD) process using Computational Fluid Dynamics (CFD) simulation. The nozzle design was created in SolidWorks with variations in groove height of 35 mm, 40 mm, and 45 mm and inlet angles of 20°, 25°, and 30°, resulting in nine configurations. The …
-
Judul Asli: MECHANICS OF MATERIAL, Fourth Edition
Judul Asli: Mechanical metallurgy, 3rd Edition
Aliran fluida yang melewati suatu sistem perpipaan akan mengalami kerugian aliran. Kerugian ini bisa disebabkan oleh beberapa hal diantaranya gesekan, bentuk saluran dan ukuran, serta adanya sambungan-sambungan. Kerugian tersebut sebaiknya bisa diketahui berapa besarnya. Untuk itu penulis mencoba melakukan percobaan terhadap aliran fluida yang dipengaruhi akibat adanya sambungan pada sistem sal…