http://repository.rmutp.ac.th/handle/123456789/139 2025-08-28T19:23:54Z http://repository.rmutp.ac.th/handle/123456789/4028 Mechanical properties of UHMWPE composite with al2O3 for application in engineering Chalo, Ngampan; งามพรรณ ชะโล; Chartpuk, Prakorb; ประกอบ ชาติภุกต์ In conducting the research on Material Science, two composite materials, ultra high molecular weight polyethylene (UHMWPE) powder and aluminum oxide (Al2O3) powder were formulated by hot compression molding process. The formulated materials demonstrated good mechanical properties and high wear resistance properties. Based on the studies, the Al2O3 grade selected was Al2O3 HTM 30 harboring mixed uneven powder particle sizes ranging from 2 to 5 microns (μm) and selected proportion of Al2O3 alloy mixed for improving mechanical and wear resistance properties of the UHMWPE composite material was the UHMWPE+Al2O3 HTM 30 at a ratio of 95:5%. When considering both material properties and cost effectiveness in the impact test, 2-5 μm Al2O3 HTM carried the higher impact strength than other aluminum oxide grades with the values up to 586.8 J/m at a ratio of 5% aluminum oxide. The hardness test of the 2-5 μm UHMWPE+ Al2O3 HTM delivered the hardness at 58.8 using the standard durometer. The tensile test values consisted of Yield Strength, Ultimate Tensile Strength, Breaking Strength, Elongation at Break, and Modulus of elasticity equal to 20.52 MPa, 29.96 MPa, 22.83 MPa, 265.8% and 784.46 MPa, respectively. วารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 16, ฉบับที่ 1 (ม.ค.-มิ.ย 2565), หน้า 192-202 2023-03-29T00:00:00Z http://repository.rmutp.ac.th/handle/123456789/4027 Parameter analysis that affects the ability to resistance penetration of ammunition on the aluminum armor surface using finite element method Saicharoen, Anucha; อนุชา สายเจริญ; Tinprabath, Padipan; ปฎิภาณ ถิ่นพระบาท; Chartpuk, Prakorb; ประกอบ ชาติภุกต This research analyzes the parameters affecting the penetrating resistance of shells on the armor surface by the finite element method. In this study, the results were compared with real bulletproof armor firing tests and finite element simulations. modeling of bulletproof armor using Solid Works program. Creating and simulating armor firing pattern using ANSYS Explicit Dynamic program. damage test is based on National Institute of Justice level 3 standards with material of the ammunition is 7.62 mm tungsten carbide (WC) and speed 847 + 9.1m/s. there are two types of bulletproof armor used in this simulation 1. SKD11 2. Aluminum AL7075. The simulations is into 1 category Simulation of stacked armor plates. The sizes of the armor plates are 6, 8, and 10 mm, and the angles of firing of bulletproof armor are 0, 30 and 45 degrees. result of this simulation, armor thickness and firing angle are factors of penetration resistance. when the angle of the projectile is tilted, it will cause the projectile to deflect, reducing the frictional contact from the impact. วารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 16, ฉบับที่ 1 (ม.ค.-มิ.ย 2565), หน้า 177-191 2023-03-29T00:00:00Z http://repository.rmutp.ac.th/handle/123456789/4026 Influence of drying air velocity characteristics on paddy drying Wongbubpa, Nuttapong; ณัฐพงษ์ วงศ์บับพา; Treeamnuk, Krawee; กระวี ตรีอำนรรค; Treeamnuk, Tawarat; เทวรัตน์ ตรีอำนรรค The objective of this research was to study the influence of drying air velocity characteristics on paddy drying. The pneumatic dryer prototype was used in this study. Test drying 15 kg of Hom Pathum paddy at 22 – 25% initial wet basis moisture content was tested drying under the drying air temperature 80OC until its moisture is 14% wet basis with the two drying air velocity characteristics. The first characteristic of drying air velocity is constant at 12.80 m/s and another is reduced velocity every 15 minutes throughout the test process from 12.80 - 8.44 m/s. Drying in a vertical tube with a diameter of 3.81 cm and height 1 m for study the drying behavior, drying rate (DR), specific energy consumption (SEC), and thermal efficiency of drying. The results showed that drying with constant air velocity gives a shorter time, higher drying rate, lower primary SEC consumption, and higher thermal efficiency than drying with reducing air velocity. วารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 16, ฉบับที่ 1 (ม.ค.-มิ.ย 2565), หน้า 165-176 2023-03-29T00:00:00Z http://repository.rmutp.ac.th/handle/123456789/4025 The overall equipment effectiveness improvement of the water filtration systems in the large water treatment plant by total productive maintenance evaluation: a case study of the water treatment plant Pussawiro, Sirawit; ศิรวิทย์ ปุสวิโร; Vorarat, Suparatchai; ศุภรัชชัย วรรัตน์ This research objective is to improve the overall equipment effectiveness of the water filtration systems in the case study of the Water Treatment Plant, which divides the water production into 4 production lines. The water filtration system has an electric actuator and gear, is the main machine in the water filtration system. An electric actuator and gear have more machine breakdowns. That makes the water filtration system is the bottleneck of the water production process. This research study is divided into two steps: the first step is the presentation of the equation and the steps to measure the Overall Equipment Effectiveness of the water filtration system. The equation used data from the computer maintenance management system to analysis on mean time between failure data (MTBF), mean time to repair data (MTTR) and water production process data. The results can be improved the overall equipment effectiveness of the water filtration system increased to 0.11%, 0.68%, 0.44% and 2.44%, respectively in each production process line. And increased Quantity of Filtration Water increased to 328,500 m3/year, 1,168,000 m3/year, 1,022,000 m3/year and 3,832,500 m3/year, respectively in each production process line. In this research used the pillar of focus improvement. By adding a protection system to prevent machine breakdown, because of the most of the problems are found that the protection system malfunctions. This is the most problem in the 4th And then used engineering knowledge to improve water production and the success factor are required a human resources of all parties to cooperate, brainstorm and analyze the causes of various losses in order to eliminate them. วารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 16, ฉบับที่ 1 (ม.ค.-มิ.ย 2565), หน้า 149-164 2023-03-29T00:00:00Z