Composite is a material consisting of two or more components which have characteristics mild and relatively strong. This study used bagasse fiber which is widely produced in sugar industry. Treatment of bagasse fiber by soaked in alkaline solution (NaOH) for 2 hours to remove the cork / wax attached to the fiber. Manufacture of composite by hand lay up. The matrix used in this study is epoxy. The fraction volume of composite between bagasse fiber and epoxy are 4%: 96%, 8%: 92% and 12%: 88%. The mechanical properties tested is tensile strength. The tensile test refers to ASTM D638 type 4. The highest tensile test composite resulted at the fraction volume composite of bagasse fiber with epoxy 12%: 88% i.e. 28.43 MPa.

The Eichornia crassipes fiber have potentially as a composite reinforcing material. The advantage of composites with natural fibers like to light weight, corrosion resistance, water resistance, attractive performance, and without machining process. The purpose of using natural fiber as an alternative material to replace glass fiber composite material with Eichornia crassipes fibers are friendly and cheap. The research material used Eichornia crassipes fiber, NaOH, Etanol, and H2O. Processing of Eichornia crassipes fiber is washing with water, natural drying ± 10 days in eviromental, fiber taking with steel brush. Dry fibre were subjected to 10%, 20%, 30% NaOH and ethanol solution with variations of immersion time of 2, 4, 6 hours, neutralization with H20, and drying at room temperature. The Single fiber tensile test specimens were made with variations of treatment type in NaOH and Ethanol solution (10%, 20%, 30%), immersion time of 2, 4, and 6 hours. Single fiber test specimens refer to standard ASTM D 3379. Optimum tensile strength test results on NaOH treatment 20% variation of immersion time 4 hours: 28.402 N / mm2 and on ethanol treatment 20% variation of immersion time 2 hours: 48.197 N / mm2.

Tempe merupakan makanan tradisional yang sudah lama dikenal di Indonesia. Industri rumahan keripik tempe masih menggunakan cara tradisional yang kurang efisien. Tujuan perancangan mesin ini adalah untuk meningkatkan produksi kripik tempe dengan variasi sudut pisau 10°, 20° dan 30°. Massa irisan tempe dikategorikan kriteria A (hasil irisan utuh 75-100%, kriteria B (hasil irisan setengah utuh 40-74%), kriteria C (hasil kurang dari setengah utuh <40%), kriteria D (tidak teriris). Mesin ini menggunakan 3 pisau yang bisa disetting sesuai tebal atau tipis irisan dan dengan variasi sudut pisau 10 °, 20 ° dan 30 °. Sudut pisau 30° lebih efektif daripada sudut pisau 10 ° dan 20 ° karena menghasilkan 258,854 gr kriteria A. Ketebalan potongan 2 mm menggunakan sudut pisau 30° lebih baik dalam hal kriteria irisan tempe teriris utuh namun kurang baik karena irisannya terlalu tebal.

This study of the influence of variations in pulley diameter driven on shallot chopper machines against the chaff yield capacity is motivated by the production and consumption of shallots in Indonesia is quite high, so it takes a red onion chopper machine to facilitate the handling and processing. The purpose of this study was to make a shallot chopper machine, to analyze the effect of variations in pulley diameter on the yield of onion chopping, and to analyze the results of onion chopping. In this study, the analyzed were chopper speed with variations in pulley diameter driven 6 inch, 7 inch, 8 inch and 1½ inch drive pulley diameter. The test method uses 200 grams of shallots per experiment with repetitions three times the experiment with variations of pulley driven 6 inches, 7 inches, and 8 inches. After testing, an analysis of the data obtained in the form of chaff yield capacity is completed. The best test results were obtained using variations in pulley diameter driven by 6 inches with a chopping yield capacity of 3.77 grams / second.

Hasil las harus mempunyai kekuatan sambung yang kuat, ini dikarenakan konstruksi las biasanya digunakan untuk menahan beban. Pemilihan bentuk kampuh las yang tepat merupakan salah satu hal yang harus diperhatikan, karena akan mempengaruhi kualitas hasil sambungan. Tujuan penelitian ini adalah menganalisis hasil dari pengelasan dengan variasi kampuh X, V dan U terhadap kekuatan tarik dan struktur makro. Spesimen penelitian yang digunakan adalah baja karbon rendah dengan ukuran sesuai standar ASTM-E8 yaitu 5 mm x 20 mm x 200 mm. Pengelasan SMAW dilakukan dengan elektroda E6013 diameter 3,2 mm, arus 80A. Hasil uji kekuatan tarik tertinggi diperoleh pada kampuh V yaitu 455,68 MPa dan yang terendah pada kampuh X yaitu 382 MPa. Berdasarkan hasil pengujian makro, daerah HAZ yang paling lebar adalah pada kampuh X sebesar 23,05 mm, dan daerah HAZ terkecil pada kampuh V yaitu 20,08 mm. Berdasarkan hasil penelitian, bentuk kampuh las paling ideal adalah kampuh V.