cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota bandung,
Jawa barat
INDONESIA
Mesin
Published by Institut Teknologi Bandung
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Arjuna Subject : -
Articles 539 Documents
 35   36   37   38   39 
KAJI EKSPERIMENTAL DAN NUMERIK TENTAN G FAKTOR KETANGGUHAN RETAK MODUS I DAN II PADA LAMINATE KARBON/EPOXY SERAT TERANYAM IGN Wiratmaja Puja; Rochim Suratman; Aditianto Ramelan; Hariadi Tri Prasetia
Mesin Vol. 15 No. 3 (2000)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This paper presents experimental and numerical analysis on the influence of crack orientations to the fracture toughness of mode I and mode II for woven type carbon/epoxy four ply laminate. The experimental procedure is carried out through off axis tensile test (ASTM D 3039-76) with nine variation of crack orientations i.e. 5°, 10°, 15°, 30°, 45° 65°, 75°, 80°, and 90°. Three rail shear test (ASTM D 4255-83) is utilized for zero degree crack orientation. The stress and strain contours around crack tips are obtained numerically using the finite element method. Numerical and experimental results of the mode I (KI) and mode II (KII) fracture thoughness are presented in graphical form as a function of crack directions. Adopting Wu's(11) Criteria for unidirectional lamina and Hahn's[6] Criteria for general anisotropic lamina, a new mixed mode fracture toughness criteria is developed for woven fiber matrix laminate.
KAJI EKSPERIMENTAL PENGARUH WAKTU PENAHANAN CAIR TERHADAP PEMBENTUKAN GRAFIT BULAT PADA PROSES PENGECORAN BESI COR NODULAR 700 R Suratman; R Widodo
Mesin Vol. 15 No. 3 (2000)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Nodular graphite on iron casting can be formed because of the present of Mg element from 0.02% - 0.05%, which is alloyed with iron base material to form FeSiMg through inoculation effect. At the pouring stage, especially in continuous production, Mg in the melting fluid and its inoculation effect decrease so that the formed graphite will not round as expected and certainly weaken its mechanical properties.This writing discuss the maximum holding time for the melting fluid in a ladle to assure acceptable mechanical properties, through experimental analysis of roundness of nodular graphite and tensile strength of the material by casting it in every 2 minutes right after adding the Mg element.By referring to the decreasing Mg, iron fluid can be held up to 100 minutes, provided that the iron fluid contain maximum 0.01% Sulfur and maintained to the lowest holding temperature without ignoring pouring temperature standard for iron, maximum temperature in the ladle set 1400 "C. However, the tensile strength will be decreased to the acceptable value only up to 24 minutes, as a result of refraction of graphite that is affected by decreasing inoculation effect.
FRACTURE BEHAVIOR OF ACRYLONITRILE-BUTADIENE-STYRENE RESIN Husaini Husaini; Kikuo Kishimoto
Mesin Vol. 15 No. 3 (2000)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In this research, mixed mode loading testing of actylonitrile-butadiene-styrene (ABS) resin was carried out by using a compact tension shear specimen which was attached to a special loading device. The angle between the loading axis and the crack surface was varied from 90o (Mode I) to 0° (Mode I1). Two types of ABS resin were examined. The first one (ABS-I) has a butadiene rubber content of 18 wt % in the form of small particles of diameter about 200 nm. The second one (ABS-2) has the same overall butadiene rubber content but a bimodal particle distribution with diameters of 200 nm and 500 nm. Crack initiation and propagation was observed by using a video microscope. The results show that the fracture angle for both materials under mixed mode loading coincides with the values predicted by the maximum hoop stress criterion. To obtain the stress intensity flzctors, numerical analyses of compact-tension-shear specimen were conducted using a two dimensional finite element analysis. Fracture behavior of ABS resins under mixed mode loading was almost the same as that under mode I loading for lower value of mode 11 component. However, for higher mode II component, shear type fracture occurred at initial crack tip.
PEMODELAN DAN SIMULASI SALURAN MOTOR BAKAR TORAK DUA LANGKAH DENGAN ALIRAN GAS TAK TUNAK T. A Fauzi Soelaiman; Rachmat K Bachrun; Arthur M Mangaranap
Mesin Vol. 16 No. 1 (2001)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A two-stroke engine is one of the commonly used energy conversion systems for transportation.The process inside the cylinder and the transport passages can be simulated with mathematical models with certain assumptions. In modeling and simulating a two-stroke engine, the flows in the passages are modeled as unsteady gas flows. The unsteady gas flows are important in a twostroke engine since they affect the intake and exhaust processes of the working fluid. The results of the simulation can be used for analyzing or tuning the intake and exhaust passages of a two-stroke engine. As an example, the program was applied for a two-stroke engine MK1.
STUDI ANALISIS EFISIENSI ENERGI DAN TEKNO EKONOMI PENGERINGAN BUTIRAN MULTI TAHAP J. P Sitompul; S Sumardiono; M. W Sariyanto
Mesin Vol. 16 No. 1 (2001)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This paper concerns on analysis of energy in drying operation, because energy is crucial and determines process efficiency throughout. Further, techno-economy is also studied for drying agricultural product, such as paddy, in a multi-stage deep-bed dryer with focussing in study two-stage one. Thermal and drying efficiency have been evaluated from experiment data. Moreover, the techno-economy in view of energy consumption for drying operation is also considered . The analysis shows that the increasing of bed height for constant drying air temperature will significantly increase thermal and drying efficiency as well as energy consumption for dryer operation. Further, thermal efficiency, drying efficiency and energy consumption decreases with increasing the inlet drying air temperature which in turn reducing of drying cost operation. The study shows that the two-stage deep-bed dryer have higher thermal and drying efficiency and lower energy consumption compared to one-stage dryer.
CIRI GETARAN MEKANIK DAN ARUS CATU PADA MOTOR LISTRIK INDUKSI 3-FASA AKIBAT EKSENTRISITAS CELAH UDARA Indra Nurhadi; Andi Isra Mahyuddin; M Ahmarudin
Mesin Vol. 16 No. 1 (2001)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This paper discusses theoretical and experimental study to determine the signature of stator supply current and stator vibration of 3-phase induction motor resulting from airgap eccentricity. Based on the theoretical study it can be formulated that the signature due to eccentricity is affected by number of slots on the rotor and the stator as well as slip, defined as "Principal Slot Harmonics (PSH)" and "Dynamics Eccentricity Components (DEC)". To study its feasibility for practical use a set of experiments was performed and the predicted signature was identified. Using the test rig, it was demonstrated that the magnitude of PSH and DEC in stator current and body vibration increase due to eccentricity.
Perancangan, pembuatan dan pengujian Sensor Sudut Cerdas (Intelligent Angle Sensor) Muljowidodo Muljowidodo; Muhammad Nur Muhadi
Mesin Vol. 16 No. 1 (2001)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Angle sensor has been used in many systems demanding angle information of moving object. Angle sensor reported here has no damping as well as filtering system, therefore vibration information inherently in the construction of sensor will be included in the measured data. Algorithm in the intelligent control system will calculate the angle value separated from any vibration data, and the results have been compared to the ideal value where no vibration occurs during measurement.
STUDI PERBANDINGAN METODE MODAL TESTING KLASIK DAN MODAL TESTING KOMPLEKS DENGAN METODE ANALITIK DALAM IDENTIFIKASI ARAH WHIRLING ORBIT SISTEM ROTOR. Bagus Budiwantoro; Zulhendri H
Mesin Vol. 16 No. 2 (2001)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The classical modal testing theory has been widely and successfully used for modal parameter identification of structures of all kinds, except rotating machinery. In this paper a new modal testing theory is explained to separate the rotor vibration into positive and negative frequenc regions. The dynamic characteristics of nonrotating structures in negative frequency region have no meanings, but the dynamic characteristics of rotor systems in negative frequency region havesignificant physical meanings. Since all dynamic characteristics of rotor systems are closely related with rotor rotations, the directivity of modes is very important in rotor dynamics. The frequency response function are obtained by the new modal testing method using complex notation can be used to identify the directivity of modes such as forward and backward. Applications of the classical and complex modal testing method are compared with the analytical method to identify the whirl directions of single/multi rotor systems.
PENYUSUNAN PROGRAM BANTU BERBASIS MEH DAN METODE PSEUDO-MODAL UNTUK ANALISIS DINAMIK SISTEM POROS-ROTOR I Wiratmaja Suweca; I Komang Jaya Santika
Mesin Vol. 16 No. 2 (2001)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This paper presents a strategy in analyzing shaft-rotor dynamics system based on finite element and pseudo-modal methods by using MATLAB® programming language. The validation of computer program developed in this study is carried out by comparing the results with those obtained in the reference [1]. The computer program then is used to analyze the dynamic behavior of the electric generator 1FC 1801 produced by PT PINDAD (Persero). The validations of the computer program's results with those obtained in reference [1] have shown a very good agreement. The application of the computer program in analyzing the dynamic behavior of electric generator type 1FC 1801 has shown that the rotor dynamic system has no critical speed in the range of its operational speed.
PERANCANGAN MEKANISME MOTOR STIRLING BERKAPASITAS 1 kW Toto Hardianto; Djoko Suharto; Tatacipta Dirgantara
Mesin Vol. 16 No. 2 (2001)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Stirling engine is an external combustion engine for converting the thermal energy into mechanical energy. This engine uses a Stirling cycle, which theoretically could have high thermal efficiency, which is as high as a Carnot cycle operating at a similar condition.This paper deals with a design process of Stirling engine's mechanism stressing on the kinematics and dynamics aspects. Thermodynamics and geometry parameters are the inputs required for designing the Stirling engine's mechanism. Material aspect has not been included in the design. The main parameters analyzed are: engine's rotational speed, working temperature, cylinder's pressure, inertial forces and power output.The results of the design are useful to give an overall picture of the main dimensions of a Stirling engine. Detail calculations are still needed for more advanced design.

Page 37 of 54 | Total Record : 539

 35   36   37   38   39 

Filter by Year

1982 2025


Reset
Filter By Issues
All Issue Vol 30 No 2 (2025) Vol 30 No 1 (2024) Vol 29 No 2 (2023) Vol 29 No 1 (2023) Vol. 28 No. 1 (2019) Vol 27, No 2 (2018) Vol. 27 No. 2 (2018) Vol. 27 No. 1 (2018) Vol 27, No 1 (2018) Vol 26, No 2 (2017) Vol 26, No 2 (2017) Vol. 26 No. 2 (2017) Vol 26, No 1 (2017) Vol. 26 No. 1 (2017) Vol 25, No 2 (2016) Vol. 25 No. 2 (2016) Vol. 25 No. 1 (2016) Vol 25, No 1 (2016) Vol 24, No 2 (2009) Vol. 24 No. 2 (2009) Vol 24, No 1 (2009) Vol. 24 No. 1 (2009) Vol. 23 No. 2 (2008) Vol 23, No 2 (2008) Vol 23, No 1 (2008) Vol. 23 No. 1 (2008) Vol 23, No 1 (2008) Vol 22, No 2 (2007) Vol. 22 No. 2 (2007) Vol. 22 No. 1 (2007) Vol 22, No 1 (2007) Vol 21, No 2 (2006) Vol. 21 No. 2 (2006) Vol 21, No 1 (2006) Vol 21, No 1 (2006) Vol. 21 No. 1 (2006) Vol. 20 No. 2 (2005) Vol 20, No 2 (2005) Vol 20, No 1 (2005) Vol. 20 No. 1 (2005) Vol 19, No 2 (2004) Vol. 19 No. 2 (2004) Vol. 19 No. 1 (2004) Vol 19, No 1 (2004) Vol 18, No 2 (2003) Vol. 18 No. 2 (2003) Vol. 18 No. 1 (2003) Vol 18, No 1 (2003) Vol. 17 No. 3 (2002) Vol 17, No 3 (2002) Vol. 17 No. 2 (2002) Vol 17, No 2 (2002) Vol. 17 No. 1 (2002) Vol 17, No 1 (2002) Vol 16, No 3 (2001) Vol. 16 No. 3 (2001) Vol 16, No 2 (2001) Vol. 16 No. 2 (2001) Vol 16, No 1 (2001) Vol. 16 No. 1 (2001) Vol 16, No 1 (2001) Vol 15, No 3 (2000) Vol. 15 No. 3 (2000) Vol. 15 No. 2 (2000) Vol 15, No 2 (2000) Vol 15, No 1 (2000) Vol. 15 No. 1 (2000) Vol 14, No 3 (1999) Vol. 14 No. 3 (1999) Vol. 14 No. 2 (1999) Vol 14, No 2 (1999) Vol. 14 No. 1 (1999) Vol 14, No 1 (1999) Vol 13, No 3 (1998) Vol. 13 No. 3 (1998) Vol. 13 No. 2 (1998) Vol 13, No 2 (1998) Vol 13, No 1 (1998) Vol. 13 No. 1 (1998) Vol. 12 No. 3 (1997) Vol 12, No 3 (1997) Vol 12, No 2 (1997) Vol. 12 No. 2 (1997) Vol 12, No 1 (1997) Vol 12, No 1 (1997) Vol. 12 No. 1 (1997) Vol. 11 No. 3 (1996) Vol 11, No 3 (1996) Vol. 11 No. 2 (1996) Vol 11, No 2 (1996) Vol 11, No 1 (1996) Vol. 11 No. 1 (1996) Vol. 10 No. 1&2 (1994) Vol 10, No 1&2 (1994) Vol 9, No 1&2 (1990) Vol. 9 No. 1&2 (1990) Vol 8, No 1&2 (1989) Vol. 8 No. 1&2 (1989) Vol 7, No 1&2 (1988) Vol. 7 No. 1&2 (1988) Vol 6, No 1&2 (1987) Vol. 6 No. 1&2 (1987) Vol. 5 No. 1&2 (1986) Vol 5, No 1&2 (1986) Vol 4, No 3&4 (1985) Vol. 4 No. 3&4 (1985) Vol. 4 No. 1&2 (1985) Vol 4, No 1&2 (1985) Vol. 3 No. 2&3 (1984) Vol 3, No 2&3 (1984) Vol 3, No 4 (1984) Vol. 3 No. 4 (1984) Vol 3, No 1 (1984) Vol. 3 No. 1 (1984) Vol. 2 No. 2&3 (1983) Vol 2, No 2&3 (1983) Vol 2, No 4 (1983) Vol. 2 No. 4 (1983) Vol 2, No 1 (1983) Vol. 2 No. 1 (1983) Vol 1, No 1 (1982) Vol. 1 No. 1 (1982) More Issue