Jurnal POLIMESIN最新文献

{"title":"Studi kekuatan sambungan las terhadap material baja TRS 500 menggunakan variasi gerakan eletroda","authors":"M. Asiri, Mardin Husen, Bahdin Ahad Badia, Muhammad Syafrun","doi":"10.30811/jpl.v18i2.1828","DOIUrl":"https://doi.org/10.30811/jpl.v18i2.1828","url":null,"abstract":"One of the most important processes in the metal, machinery, and manufacturing industries is the process of joining metals called welding processes. The movement of the welding electrode can affect the strength of the joint on the welding results. This study aims to determine the results of the strength of a single V-butt joint welding joint using straight electrode movement, circular electrode movement and zigzag electrode movement on TRS 500 steel plates. The welding process is carried out on 6 mm thick steel plates using the SMAW welding process with welding currents 75-95 A, E7016 electrode wire in 1G (down hand) position. Dimensions of specimens and procedural tensile testing procedures in SNI 07-0371-1998 tensile test rods for metal materials referred to JIS Z 2241. From testing the results of welding using electrode movement variations there is an influence on tensile strength and hardness which indicate that the tensile strength of joints the highest welding occurs in the straight electrode (without swing) welding which has the highest average tensile strength of 728.17 MPa and strain of 13.17%, while the lowest tensile testing value of zigzag electrode movement (swing pattern Z) with the average tensile stress value an average of 672.83 MPa and a strain of `13.21%. The value of hardness in the area of heat influence (HAZ), the highest average value of Rockwell hardness is found in the results of welding straight electrode movement of 70.40 N / mm 2 , while the lowest hardness values in welding circular electrode movement with an average hardness value of 69.10 N / mm 2 .","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116980748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preliminary study on the use of solar energy to drive biomass briquetting machines","authors":"Dicky Risky, A. Setiawan, M. Yusuf","doi":"10.30811/jpl.v18i2.1913","DOIUrl":"https://doi.org/10.30811/jpl.v18i2.1913","url":null,"abstract":"Indonesia is highly potential in biomass resources. However, the use of biomass as energy resource is still limited and inefficient. One of the best strategies in optimizing biomass energy utilization is through densification methods where biomass density increases, and costs associated with transportation and storage are reduced. To carry out densification of biomass waste, reliable tools are required. Biomass waste is usually found in rural areas where inadequate transportation access and the unavailability of electricity networks are often the issues too. On the other hand, Indonesia has abundant sunlight intensity throughout the year to be utilized as a renewable energy source. This study examines opportunities for the utilization of solar energy (PV systems) to drive biomass briquette machines in the rural areas. This research was carried out through several stages including literature study, data collection on the intensity of solar radiation, and calculation and preparation of machine design. The target is to prepare a design for the briquettes pressing machine powered by solar energy. This preliminary investigation concluded that the briquette pressing machine with a production capacity of four briquettes in a single press, was able to be operated using 100 Wp solar panels equipped with a 12-volt 33Ah battery. To drive a hydraulic jack, a 12-volt DC actuator is used at low speeds. The machine is capable of producing briquettes in the form of cubical with the size of 2.5 x 2.5 x 2.5 cm.","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121580418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of indoor test-rig to measure dynamic forces and moments on tire contact path of family car","authors":"Bukhari M. Kasim, Ilyas Yusuf, M. Mawardi","doi":"10.30811/jpl.v18i2.1917","DOIUrl":"https://doi.org/10.30811/jpl.v18i2.1917","url":null,"abstract":"The vehicle's suspension system is designed to absorb shocks from road disturbance. The dynamic behavior of a tire suspension depends on many factors. Some main factors are vehicle load, speed, steering angle, road disturbances and the amount of tire elasticity. The dynamic behaviour of the tire is very difficult to observe when the vehicle is traveling on the road. To overcome this problem, in this paper, a test rig will be designed to be able to observe changes in tire dynamic properties experimentally for family car type. The design concept is based on the sprung and un-sprung mass dynamics. This research was conducted by five methods; study mechanism of measuring the tire dynamic behaviors, design of test equipment construction, simulations, and analysis of construction strength. The spring mass construction is designed to have 1 degree of freedom which is able to move the translation in a vertical direction to indicate changes in car body height. On the other hand, the un-sprung mass construction is designed to have 3 degrees of freedom that can move translation in the vertical direction, rotation in the z axis and rotation in the x axis. Movement in the vertical direction is to simulate a tire jump, rotation on the z axis is to simulate the steering angle and rotation on the x axis is to simulate the camber angle. The design result shows that the design construction not only saves to handle all forces and moments but can also fulfill functions to simulate the dynamic response of the car model. Simulation result shows maximum stress is point on C-D bar that is 7.13 N/mm 2 . This value is less than allowable shear stress which is 37N/mm 2 . By all simulation result, it can be concluded that all materials used are saved for this construction.","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127590448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisa pengaruh perlakuan kimia pada serat terhadap kekuatan impak charpy komposit serat sabut kelapa bermatriks epoxy","authors":"Z. Zulkifli, I. B. Dharmawan, Wahyu Anhar","doi":"10.30811/jpl.v18i1.1583","DOIUrl":"https://doi.org/10.30811/jpl.v18i1.1583","url":null,"abstract":"Penggunaan serat sabut kelapa pada material komposit akan menaikkan nilai komersial dari perkebunan kelapa. Kekuatan komposit berpenguat serat alam dipengaruhi oleh penyebaran serat, interaksi antara serat dengan matriks, bagaimana serat itu diperoleh, ukuran serat, dan bentuk serat. Untuk memperoleh ikatan yang baik antara matriks dan serat dilakuan modifikasi permukaan serat. Alkalisasi pada serat alam adalah metode yang telah digunakan untuk menghasilkan serat berkualitas tinggi. Penelitian ini menganalisis dan mengetahui pengaruh perlakuan kimia pada serat  terhadap kekuatan impak material komposit diperkuat serat sabut kelapa bermatriks epoxy . Adapun tahapan pada penelitian ini yaitu dilakukan perendaman serat sabut kelapa pada larutan NaOH dengan konsentrasi 10%, 15%, dan 20%, selama 2 jam, lalu serat dicuci dengan menggunakan larutan H 2 O 2 dengan konsentrasi 3% selama 1 jam. Adapun hasil dari penelitian ini yaitu perlakuan alkalisasi terhadap komposit serat sabut kelapa mempengaruhi sifat kekuatan impak dari material komposit dengan kekuatan impak dan energi serap material komposit memiliki hubungan terbalik terhadap jumlah konsentrasi larutan alkalinya. Makin tinggi konsentrasi larutan alkalinya yang diberi pada serat akan menyebabkan makin kecilnya energi serap dan kekuatan impak dari material komposit berpenguat serat sabut kelapa. Kata kunci : komposit, serat sabut kelapa, NaOH, H2O2, kekuatan impak Effect of chemical treatment of composite coir fiber with epoxy matrix on the Charpy impact strength Abstract The use of coconut fiber in composite materials will increase the commercial value of coconut plantations. The strength of a natural fiber-reinforced composite is influenced by the spread of the fiber, the interaction between the fiber and the matrix, how the fiber is obtained, the size of the fiber, and the shape of the fiber. To obtain a good bond between the matrix and the fiber surface fibers are modified. Alkalization of natural fibers is a method that has been used to produce high-quality fiber. This study analyzes and examines the effect of chemical treatment on fiber on the impact strength of composite materials reinforced with epoxy coconut fiber coir fiber. The stages in this study were first carried out soaking coconut coir fiber in NaOH solution with a concentration of 10%, 15%, and 20%, for 2 hours, then the fiber was washed using H 2 O 2 solution with a concentration of 3% for 1 hour. The results of this study are the alkalization treatment of coconut coir fiber composites affecting the impact strength properties of composite materials where the impact strength and absorption energy of composite materials have an inverse relationship to the amount of alkaline solution concentration. Where the higher the concentration of the alkaline solution given to the fiber will cause the smaller the absorbing energy and the impact strength of the composite fiber-reinforced coconut fiber.","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132913512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of infill pattern, infill density, printing speed and temperature on the additive manufacturing process based on the FDM technology for the hook-shaped components","authors":"N. Tho, Tong Cong Minh, Nguyen Phat Tai","doi":"10.30811/jpl.v18i1.1445","DOIUrl":"https://doi.org/10.30811/jpl.v18i1.1445","url":null,"abstract":"The additive manufacturing technology based on the principle of material addition is an important technology in product design, manufacturing, and development. In addition, the trend in the recent future of this technology will be a major step to develop in the rapid manufacturing industry. Among the rapid prototyping technologies, the most popular FDM (fused deposition modeling) technology has been widely applied in the practice. The quality of rapid prototyping technology in general as well as FDM technology in particular mainly depends on the parameters in the prototyping and operational process. In this paper, the optimum parameters of the prototyping process based on the FDM technology are identified to improve the tensile strength of 3D printing products with PLA and PLA-copper materials. The parameters are chosen in the process of doing the experiments such as infill pattern, fill density, print speed, and print temperature. Then, based on Taguchi analysis technique, the experimental planning method is employed for design and optimization, with the support of Analysis of Variance (ANOVA) to evaluate and identify the influence of parameters on the tensile strength of the printed hook-shaped product. The results highlighted that the maximum tensile force of the sample is printed with PLA-Copper material with the optimum parameters is infill density of 75%, printing speed of 65 mm/s, and temperature of 185°C.","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122405793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kekuatan lentur komposit sandwich kayu bakal lambung perahu sebagai core dan polyester serat gelas sebagai skin","authors":"Azwar Yunus, S. Saifuddin, M. Marzuki, Dahlul Arifin","doi":"10.30811/jpl.v18i1.1579","DOIUrl":"https://doi.org/10.30811/jpl.v18i1.1579","url":null,"abstract":"Penggunaan kayu sebagai bahan baku perahu nelayan memiliki beberapa kelemahan yaitu kekuatan dan ketahanan air yang kurang baik. Akibatnya, umur pakai perahu tidak ekonomis sehingga membutuhkan teknologi material komposit sandwich. Kayu dilapisi dengan komposit polyester serat gelas pada kedua permukaannya. Tujuannya untuk meningkatkan kekuatan kayu, memproteksi penyerapan air, serta melindungi paparan matahari. Hal ini menguntungkan, karena badan perahu tidak perlu dicat dan dilapisi dengan lapisan seng pada bagian lambungnya yang selama ini sering dilakukan para nelayan. Artikel ini mengkaji kekuatan lentur bahan komposit sandwich menggunakan beberapa jenis kayu (Damar Laut dan Merbau serta Sengon dan Damasui) sebagai core , komposit polyester dan gelas sebagai skin . Specimen uji dibuat dengan metode hand lay up dengan ketebalan core  8  mm dan skin 1 lapisan pada masing - masing permukaan (1 mm) kemudian dibentuk mengikuti standart ASTM C 1341. Pengujian lentur menggunakan Universal Testing Mechine Galdabini. Hasilnya menunjukkan bahwa bahan core kayu Sengon (lunak) menghasilkan peningkatan kekuatan lentur yang sangat signifikan hingga 92 %  dibandingkan core kayu Damasui dengan peningkatan hanya 5.1.%. hasil pengujian juga menunjukkan bahwa kekuatan dipengaruhi oleh ikatan pada bagian sambungan interface permukaan core dan skin yang berhubungan dengan kemampuan resin berpenetrasi ke dalam permukaan kayu untuk mengasilkan sambungan yang baik dan padu. sedangkan core kayu Merbau dan Damar Laut proses sandwich  menghasilkan peningkatan kekuatan lentur  sekitar 14 %. Maka, kayu Sengon yang telah dilapisi dengan komposit polyester serat gelas memenuhi syarat mekanik dan fisik sebagai bahan perahu. Demikian juga dengan ke 3 jenis kayu lainnya, kekuatan lenturnya juga mengalami peningkatan. Kata kunci: kayu perahu, sifat mekanik, kekuatan lentur, komposit sandwich,  polyester  serat gelas. The flexural strength of the combination of wood sandwich composite boat hull as a core and glass fiber polyester as a skin Abstract Wood as raw material for boat making has some limitation for mechanical and physical properties. The sandwich composite material technology will apply to solve the case, where the wood will be coated with glass fiber polyester composites on both surfaces to increase the strength, protect water absorption and sun exposure. So, the body of boat does not need to be painted and coated with a layer of zinc on the hull, which has often been done by fishermen. This article examines the flexural strength of sandwich composite materials, using several types of wood (Damar Laut and Merbau and Sengon and Damasui) as cores and glass fiber polyester composites as skins. Specimens were produced by  hand lay-up method (core thickness of 8 mm and skin 1 layer on each surface) and preparing specimen according to ASTM C 1341. The results showed that the Sengon (soft) wood core material produced a very significant increase in flexural strength of up t","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122126726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengaruh temperature dengan konsentrasi elektrolit terhadap hasil elektroplating tembaga pada baja karbon rendah.","authors":"Muhammad Ab, Rudi Kurniawan","doi":"10.30811/jpl.v3i2.1452","DOIUrl":"https://doi.org/10.30811/jpl.v3i2.1452","url":null,"abstract":"","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130106509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perancangan dan pembuatan prototipe robot bermain bola takraw (software).","authors":"Ariefin Ariefin","doi":"10.30811/jpl.v3i2.1449","DOIUrl":"https://doi.org/10.30811/jpl.v3i2.1449","url":null,"abstract":"Bagian elektronik robot adalah hardware dan software yang mutlak harus ada agar robot lebih sederhana dan lebih mudah memodifikasinya. Software robot bermain bola takraw menggunakan hardware board DT51 dengan mikrokoatroler AT89C51. Part 1 dari AT89C51 digunakan untuk menggerakkan motor, Port A untuk sensor limit switch dan sensor jalur, Port B umuk sensor posisi keranjang Software-nya menggunakan bahasa assembly dirancang mampu memberikan  respon kepada  4(empat) buah motor DC, 2(dua) motor untuk pergerakan maju, mundur, belok kiri, belok kanan dan berhenti. 2(dua) motor untuk penembak bola dan pengambil bola. Software dirancang untuk menunda 3 detik dan kemudian memberi respon terhadap penyimpangan jalur; agar robot tidak terlalu bergoyang saat kembali berbelok ke jalur yang benar. 9(sembilan)  buah sensor photo transistor: 3(tiga) buah untuk sensor jalur dan 6(enam) buah untuk sensor posisi keranjang, 3(tiga) buah sensor limit switch 2(dua) buah untuk tanda pengambilan bola dan l(satu) buah untuk tanda bahwa bola sudah ditembakkan. Sebuah software pengendali robot yang  dihasilkan dengan menggunakan bahasa pemograman tingkat rendah (low level language) yaitu bahasa assembly di loading Ice board DT51 dengan menggunakan software DT51L. Kemudian software dan board DT51 dioperasikan dalam model Stand Alone yang dapat menjalankan program secara otomatis fika power pada DT51 dihidupkan.","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134234511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisa umur pahat karbida dengan menggunakan Bahasa pemograman C++","authors":"Ilyasin Yusuf, B. Bukhari","doi":"10.30811/jpl.v3i2.1446","DOIUrl":"https://doi.org/10.30811/jpl.v3i2.1446","url":null,"abstract":"","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"273 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114944136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hardening pada baja aisi C 1045.","authors":"A. Ismy","doi":"10.30811/jpl.v3i2.1450","DOIUrl":"https://doi.org/10.30811/jpl.v3i2.1450","url":null,"abstract":"Sifat mekanik suatu logam tidak hanya tergantung dari komposisi kimia; tetapi juga pada struktur mikro dan proses perlakuan akhir. Pengerasan (hardening) adalah salah satu bentuk perlakuan panas dimana pengerasan dilakukan dengan memanaskan baja di daerah austenit, kemudian didinginkan cepat. Untuk itu telah disiapkan 15 buah. material uji baja AISI CI045 dengan pengaruh perbedaan temperature austeniusasi 800,850, 900, 950, 1000° C dan media pendingin air, oli SAE 20/40 dan emulsi Satu bual: material yang tidak dikeraskan digunakan  sebagai pembanding peningkaian kekerasan. Komposisi karbon pada baja AISI CI045 adalah 0,43 - 0,50%. Hasil penelitian memperlihatkan bahwa kecenderungan peningkatan kekerasan terjadi tidak hanya dipengaruhi oleh naiknya temperature pemanasan tetapi juga laju pendinginan, dimana kekerasan optimum diperoleh pada temperature 850°C, holding time 15 menit dan pendinginan air, yaitu HV = 572,2. Kekerasan maksimum dengan media pendingin  emulsi diperoleh nilai kekerasan HV = 427,8 juga   pada temperature 950° C.","PeriodicalId":166128,"journal":{"name":"Jurnal POLIMESIN","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128697963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}