Berbagai kerajinan tangan dapat dikembangkan di masyarakat, salah satunya kerajinan tangan berbahan komposit yaitu menggunakan resin sebagai bahan utamanya. Metode pengecoran atau manufaktur bahan komposit ini memiliki variasi sesuai dengan resin yang digunakan atau peruntukkan komposit itu sendiri. Metode manufaktur ini dapat diaplikasikan oleh masyarakat dengan mudah, sehingga komposit yang dihasilkan dapat dimanfaatkan sebagai kerajinan tangan yang memiliki nilai tambah. Pelatihan metode manufaktur material komposit sebagai kerajinan tangan ini diberikan kepada Komunitas Riverside, Desa Suko, Kecamatan Sukodono, Kabupaten Sidoarjo. Pada prinsipnya pelatihan ini mengaplikasikan metode pengecoran sebagai dasar teknis aplikasi kerajinan tangan berbahan komposit. Pelatihan dilakukan dengan memberikan pengetahuan dasar tentang bahan resin dalam bentuk ceramah atau presentasi, kemudian dilakukan praktek metode manufaktur material komposit tersebut sehingga menghasilkan kerajinan tangan yang bernilai tinggi. Hasil kerajinan tangan berbahan komposit yang dihasilkan antara lain adalah gantungan kunci, bros, dan magnet hiasan kulkas.
Barge is one type of ship that is widely used to transport various cargoes. One type of barge is a deck crane barge, barges with shear leg cranes or full rotating cranes. In the construction design, it is necessary to calculate the strength to avoid construction failure. One of the methods used to construction calculations is the finite element method. The finite element method is one of the most widely used numerical methods for engineering calculations. In this study, the strength of the deck crane barge was calculated using the finite element method. SHELL181 and BEAM189 elements were used in this study to simplified the modelling. The results of modeling with the finite element method produce that the maximum stress occurs at the connection between the bulkhead girder and the transverse frame (bracket), at Node 625. The construction strength of the deck crane barge model with a crane capacity of 250 tons (model 1) below the permissible stress, the value is 151.01 MPa. And the stress of the deck crane barge with a crane capacity of 350 tons (model 2) is 190.92 MPa, the stress exceeds the permessible stress.
LPG is one of the gas fuels needed in daily life after the government has converged the use of fuel oil to fuel gas. The distribution of 12 Kg LPG in remote and outermost areas is still often hampered by the delivery process. Constraints in the distribution of 12 Kg LPG caused prices to become unstable. Government program to reach out and equal distribution of goods by making jalur tol laut. One of the sea toll fleets is the pioneer container ship that transports containers from remote and outermost areas. One alternative to transporting 12 Kg LPG is to use dry containers as a means of transportation. The transportation of 12 Kg LPG using containers goes through the design stages and structural analysis to determine the feasibility of the construction. Containers with a length of 20 feet are capable of carrying 126 12 Kg LPG cylinders, with an additional deck construction in the middle of the container with a deck plate thickness of 2 mm. By using the ANSYS APDL software, the analysis of the strength of the additional construction structure in the container is still below the required allowable stress of 103.23 N/mm2 and the actual deflection that occurs is 0.516 mm.
AbstrakPerkembangan teknologi dalam bidang material dan konstruksi menghasilkan banyak inovasi, salah satunya adalah sandwich plate system. Sandwich plate system merupakan sebuah material yang dibentuk oleh dua material yang berbeda menjadi ke dalam satu layer. Sandwich plate system terdiri dari face berupa plat dan core berupa komposit. Cangkang kerang merupakan salah satu bahan limbah yang dapat digunakan sebagai filler pada core. Material komposit yang digunakan sebagai core merupakan campuran antara serbuk cangkang kerang sebagai filler dan resin sebagai matrix. Perpaduan antara serbuk cangkang kerang dan resin, menghasilkan material komposit yang kuat. Sandwich plate system dengan menggunakan core dari serbuk cangkang kerang dan resin menghasilkan kekuatan yang baik dan dapat diaplikasikan pada konstruksi geladak kapal. Material dengan menggunakan filler serbuk cangkang kerang sebesar 20% dari berat resin menghasilkan tegangan maksimum pada geladak sebesar 53.32 N/mm 2 , dan 53.20 N/mm 2 dengan filler sebesar 30% dari berat resin. Kata kunci: sandwich, cangkang kerang, kapal, kekuatan AbstractThe development of technology in the field of materials and construction produces many innovations, one of them is a sandwich plate system. A sandwich plate system is a construction element composed of two or more material layers. The sandwich plate system consists of two faces made of steel plate and a core made of composite material. Sandwich plate system consists of face that from plate and core form composite. Clam shells are one of the waste materials that can be used as filler on the core. The composite material part is made of a mixture of clam shell powder as a core, and resin as a matrix. The combination of clam shells powder and resin, produces strong composite materials. Sandwich plate system using core from clam shells powder and resin produce good strength and can use in ship deck. The material using 20% clam shells powder as filler of the resin weight has maximum stress 53.32 N/mm 2 on the deck and 53.20 N/mm 2 for 30% of filler by weight of the resin.
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