Sampah plastik adalah salah satu masalah lingkungan yang ada di Indonesia. Sampah plastik meupakan jenis sampah yang sulit terurai, sehingga perlu penanganan khusus untuk pengolahan masalah tersebut. Salah satu alternatif yang ditawarkan yaitu dengan pembuatan mesin pencacah plastik. Salah satu dalam manufaktur suatu mesin yaitu menrancang dan menganalisa komponen yang digunakanan. Mata pisau merupakan salah satu komponen penting pada mesin pencacah plastik. Simulasi model dari mata pisau sendiri perlu dilakukan untuk menganalisa kinerja dari mata pisau tersebut saat proses kinerja mesin tersebut. Permodelan simulasi dilakukan menggunakan software CAE. Bentuk meshing pada permodelan mata pisau yaitu menggunakan tetrahedral dan rasio meshing yaitu mendekati 1. Hasil yang didapatkan dari proses permodelan mata pisau yaitu tegangan maksimum Von mises pada pembebanan 300N, 500N dan 700N berturut turut sebesar 6,752 x 10-3 MPa, 2,845 x 10-3 MPa dan 1,575 x 10-3 MPa. Sedangkan besaran displacement pada variasi pembebanan 300N, 500N dan 700N berturut turut memiliki nilai 6,752 x 10-2 mm, 1,125 x 10-1 mm dan 1,575 x 10-1 mm. Safety factor pada simulasi ini dihasilakan yaitu memiliki nilai 15 yang artinya aman untuk semua variasi pembebanan karena memiliki nilai lebih dari 1.
The characterization of strain rate effects near glass transition temperature (T g ) gives important information on flow behavior of metallic glasses (MGs). For this purpose, the tensile strain rate jump test was carried out near glass transition temperature to evaluate the flow behaviors of ZrCoAl(Si) MG ribbons. The primary thermal analyses showed that the Si minor addition into the ZrCoAl alloy leads to the betterment of thermal stability and the glass forming ability (GFA), correlated with the small size of Si atoms and subsequent formation of denser atomic clusters and thermodynamically liquid stabilization in the system. The tensile strain rate jump test indicated that minor adding of Si element decreases the sensitivity of glassy alloy to the flow stress and improves the stability of amorphous structure under increase in the strain rate and applied temperature. It was also observed that the viscosity behavior is more stable with the increase of the strain rate and temperature in the Si-added sample, implying the high capability of viscoplastic response in this state.
The amount of plastic waste each year will increase by 10% every year which is a problem for a country. Therefore, proper processing of plastic waste needs to be done. Before being processed into plastic waste processing, it is necessary to have a chopping process using a plastic chopping machine. The plastic chopping machine has an important component, namely the chopping knife. Before carrying out the knife manufacturing process, it is necessary to validate the design of the blade that is used with its loading. Model simulation using software is one way to quickly validate the model. This study aims to determine the effect of loading variations on stress, strain, deformation and safety factors of the model. The use of ANSYS R17.2 software is used to analyze the chopping machine knife model with a variation of 5kg / hour, 10kg / hour, 20kg / hour and 50kg / hour capacities. The result is that the stress, strain and deformation parameters have an increase in value with increasing loading variations. The greatest values of stress, strain and deformation are in the variation of 50kg / hour respectively 64.995 Pa; 336.76 and 56,358 x 10-11mm. The value of the safety factor for all variations of loading has a value of 15. The value of the safety factor means that the design of the plastic chopping knife is safe to use up to a loading of 50kg / hour
Allen key merupakan alat bantu untuk mengencangkan, melonggarkan dan melepas baut bekepala segi enam. Alat bantu harus mampu menahan beban dan menahan kontak. Simulasi pemodelan allen key dilakukan untuk mengetahui pengaruh deformasi dan angka keamanan dari sebuah desain. Software ANSYS R19.2 membantu untuk menganalisis pemodelan. Parameter deformasi, regangan, tegangan mengalami kenaikan disetiap variasi pembebanan dengan nilai terbesar pada variasi beban 325N nilai deformasi sekitar 8,9135mm, Regangan sebesar 2,2 x 10-3mm, tegangannya sebesar 4,54 x 102Mpa. Angka keamanan setiap variasi pembebanan adalah 15, nilai tersebut menunjukkan desain, variasi yang diberikan dan jenis material aman untuk digunakan sampai pembebanan 325N.
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