PERANCANGAN ALAT UJI DEFLEKSI BATANG KANTILEVER FLEKSIBEL

Deflection is the change in shape experienced by the beam in the y direction due to the vertical loading applied to the beam or bar. Cantilever rods are if one end of the beam/rod is clamped and the other end is free. In this study, a flexible cantilever rod deflection test device was designed. This tool is used to determine the deflection/deflection that occurs in the beam/strip plate after being given a load. The method used is library research, a data collection method that is carried out by reading, studying, and researching the relevant literature with the title of this thesis which aims to collect data and analyze a theoretical understanding. This research will focus on designing and testing flexible cantilever rod deflection test equipment and utilizing beam/ strip plate as a test specimen for flexible cantilever rods. This tool has a height of 100 cm and a width of 90 cm and this tool is equipped with an HC-SR04 sensor which is directly connected to a digital number. The results of testing the strip plate with a load of 1 kg and 1.5 kg using the HC-SR04 sensor showed that the deflection at the smallest end was 20 mm, and the largest value was 30 mm. the theoretical calculation with equation (2-9) obtained the smallest result of 1.06 mm and the largest value of 3.5 mm.Defleksi adalah perubahan bentuk yang dialami balok pada arah y akibat adanya pembebanan vertikal yang diberikan terhadap balok atau batang. Batang kantilever yaitu jika salah satu ujung balok/batang dijepit dan yang ujung lain bebas. Pada penelitian ini dirancang sebuah alat uji defleksi batang kantilever fleksibel alat ini difungsikan untuk menentukan lendutan/defleksi yang terjadi pada beam/plat strip setelah diberi beban. Metode yang digunakan yaitu dengan penelitian kepustakaan suatu metode pengumpulan data yang dilakukan secara membaca, mempelajari, dan meneliti literature-literature yang relevan dengan judul skripsi ini yang bertujuan untuk mengumpulkan data dan menganalisa suatu pengertian yang bersifat teoritis. Pada penelitian ini akan berfokus pada perancangan dan uji coba alat uji defleksi batang kantilever fleksibel dan memanfaatkan beam/plat strip sebagai bahan spesimen uji batang kantilever fleksibel. Alat ini mempunyai tinggi 100 cm dan lebar 90 cm dan alat ini dilengkapi dengan sensor HC-SR04 yang langsung terhubung dengan digital number. Hasil pengujian plat strip beban 1 kg, dan 1.5 kg menggunakan sensor HC-SR04 didapatkan hasil defleksi pada ujung yang terkecil yaitu 20 mm, dan pada nilai yang terbesar 30 mm. pada perhitungan secara teoritis dengan persamaan (2-9) didapatkan hasil terkecil 1.06 mm dan nilai yang terbesar 3.5 mm.

RANCANG BANGUN TURBIN REAKSI PADA SUNGAI TAMAN KOTA 2 DENGAN MODEL ALIRAN VORTEX

Electricity is a necessity that must exist today, its use is always subject to binding. Most of the electricity comes from fossil energy-based power plants such as PLTU. Therefore, a solution was made by making a vortex water turbine to produce electrical energy. Utilizing a river flow with a small head of water, the water will enter the cross section. The flow will form a vortex because the shape of the section and the draft tube makes the lower side of the section have lower pressure. The vortex turbine will be designed to use a permanent magnet 150 watt AC generator. With a cross section of 60 x 55 x 150cm, draft tube 9.6 mm and turbine blade 30 x 50cm made of aluminum. On the framework will be used a 3 x 3.5 cm strip plate which is rolled. In order to withstand the impact of water on the blade, a 7 mm shaft is used and a nominal bearing life of 10274 hours. The resulting rotation is continued with a pulley with a diameter of 30 mm, 180 mm and with a belt type V material JIS K 6323 A 34.

DESIGN, BUILD, AND TESTING TRANSPORTATION WHEELS FOR TRANSPORTATION OF PALM OIL FRUIT IN PEATLAND

To increase the collection of oil palm yields on peatlands, the team made a design and tested the fruit vehicle using a double garden jeep. The design that is done is to make an iron wheel equipped with fins made of angled profile iron. To increase the diameter of the wheel, the standard wheels are given spokes from a 0.5 mm strip plate and are welded to the outside of the wheel with fins. The stress analysis results in the critical area show that the stress that occurs is lower than the allowable stress. The shear stress on the strip plate connected to the wheel is much less than the allowable shear stress(3 kg/cm2 ≤300 kg/cm2). Then the compressive stress that occurs is also smaller than the allowable stress (200.5 kg/cm2 ≤ 300 kg/cm2) however, the bending stress that occurs in the fins is much greater than the allowable stress (1413 kg/cm2 ≤ 400 kg/cm2), it is necessary to make additional reinforcement part fins every 10 cm. After the wheels are produced, testing is carried out by transporting 1100 kg of the palm fruit. From the results of these trials, it can be concluded that the wheel design fulfills the needs.