1,721,063 research outputs found
Profil Video Prof. Agus Dwi Anggono, S.T., M.Eng., Ph.D
No full textProf. Agus Dwi Anggono, S.T., M.Eng., Ph.D merupakan guru besar program studi Teknik Mesin. Beliau lahir di Kudus, 17 Juni 1976 lalu menempuh pendidikan strata 1 di Material dan Struktur UMS (1999), strata 2 di Material dan FEM UGM (2009), strata 3 di Computational Mechanic dan FEM Universiti Tun Hussein Onn Malaysia (2014), serta profesi insinyur di Teknik Mesin UMS (2018). Publikasi ilmiahnya telah dimuat di berbagai jurnal ilmiah serta karya bukunya ada di beberapa penerbit dengan hak kekayaan intelektual sebanyak 4 buah
Drop test analysis of fuselage section of R80 commuter aircraft by using finite element method
No full textPREDIKSI SHRINKAGE UNTUK MENGHINDARI CACAT PRODUK PADA PLASTIC INJECTION
No full textPlastic injection merupakan proses manufactur untuk membuat produk dengan bahan dasar plastic atau dalam kesempatan ini polypropylene. Pada proses tersebut seringkali terjadi cacat produk seperti pengerutan, retak, dimensi tidak sesuai dan kerusakan saat produk keluar dari mould, sehingga banyak material yang terbuang percuma. Meskipun cacat produk tersebut dipengaruhi banyak factor, tetapi yang paling utama adalah masalah shrinkage, atau penyusutan material setelah terjadi pendinginan. Sangat penting untuk melakukan prediksi lebih awal terjadinya penyusutan setelah pendinginan untuk menghindari cacat produk. Dalam penelitian ini akan dilakukan prediksi shrinkage yang akan digunakan untuk material polypropylene dengan cara perhitungan standar. Pembuatan modeling dalam bentuk 3D (tiga dimensi) injection molding baik cavity maupun corenya dengan menggunakan CATIA, kemudian dilakukan analisis dengan software MoldFlow untuk pembuatan mesh dan memberikan batasan panas pada komponen sehingga dapat diketahui mode penyusutannya. Analisis ini akan memberikan gambaran tentang distribusi panas pada mould dan memberikan tentang gambaran aliran fluida. Pada analisis tersebut dapat dilihat gejala terjadinya cacat produk, jika hal itu terjadi maka perlu dilakukan perubahan shrinkage, sampai diperoleh hasil analisis yang baik
Combined method for die compensation in sheet metal forming
No full textSheet metal forming is one of the prominent methods to convert blank sheet
material into a product. In sheet metal forming, proper allowance of its tools
must be given to the elastic recovery, due to the nature of elastic property which
is called springback. When stamped sheet components are removed from the
forming tools, the internal stresses will rest, and a new equilibrium state will
be reached. As a result, the final shape of the drawn part will deviate from
the shape imposed by the forming tool. Therefore, it is very important that
springback be accurately predicted and compensated. In the industry, this is a
costly and time consuming process of product shaping and redesigning the tools
manually. The goal of this research is to develop a compensation procedure that
can perform this optimization process, using the combination of Displacement
Adjustment (DA) and Spring Forward (SF) methods. Both are based on an
iterative procedure. The method is needed for guiding die design to compensate
for springback in a backward direction and then to compensate springback in a
forward direction. This new approach is then called Combined Method for Die
Compensation (CMDC). The testing of CMDC has been conducted in 2D model
of U-bending and 3D shape of S-rail model adopted from Numisheet 2008. The
result shows that CMDC is able to reduce error in every cycle of the total five
cycles. The result of reduction in shape deviation is 66% to 73% for the 2D
model compensation, and for the 3D model, 55% reduction in shape deviation
can be reached. The CMDC method can be further implemented and integrated
in a commercial FEM software to assist the optimization process to improve the
precision of stamping products
Design and static analysis of the outer rear door dies of Rajawali R2 SUV by using CATIA V5
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Analisa Kekuatan Sambungan Baja ST 37 Dengan Variasi Ampere 120, 160, 200, Menggunakan Metode SMAW Wet Underwater Welding
Get PDFObjectives of the research are to investigate the welding strength of ST37 steel and to investigate the micro/macro structure of welding cross section. The welding process was conducted by using SMAW wet underwater welding. The welding of the research was connected two materials of ST37 steel with the thickness of 5 mm. The underwater welding carried out in the square water tank with the dimensions of L = 1 m, W = 0.5 m, H = 0.5 m and water level of 0.2 m. Electric current during the welding process varied from 120, 160 and 200 ampere.
Micro photo is done by using Euromax photo, Holland type. While the tensile test is performed by using SANS Universal Testing Machine. Highwood HWMMT-X7 hardness machine test is used to test the hardness of welding specimens. From the micro photo, it was shown clearly that in the HAZ was found grains of perlite and ferrite, where as in the weld nugget area was dominant of Bainit ( B ), Ferrite Grain Boundary (FGB) and Martensite ( M ).
The results showed that the greater the applied current generated voltage decreases and the harder the level of violence in the area weld nugget. On specimens 120 A produces a maximum voltage of 354,45 Mpa with the highest hardness of the specimen 200 A point 0 at 353,5 HVN
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