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Articles by H. Mobli
Total Records ( 3 ) for H. Mobli
  K. Kheiralipour , A. Tabatabaeefar , H. Mobli , S. S. Mohtasebi , S. Rafiee , A. Rajabipour and A. Jafari
  In this study, two theories for terminal velocity of fruits were proved by authors as KHAT1 and KHAT2 theories. Terminal velocity of Redspar apples was experimentally measured using water column and video camera. Some apple characteristics that affect on terminal velocity of apple based on proved theories were determined using standard methods. There is found that the most effective characteristics on apple terminal velocity were density and volume. The best equation for terminal velocity of Redspar apples was found with R2 = 0.69.
  S.S. Mohtasebi , H. Afshari and H. Mobli
  Due to the requirements of advanced industries to use lighter materials at high speed, static analysis of stress and strain can not be applied as a complete and powerful method, the dynamic behavior of the system should also be considered, however, the results should be confirmed by experiment. In this research, first, in order to investigate the effects of flywheel on natural frequency of crankshaft, the crankshaft, by using ANSYS software, was modeled in two cases; with flywheel and without flywheel at free-free condition. In the second phase, experimental modal analysis; the way that gives particularization of system responses, was applied to measure Frequency Response Function FRF). To do the experiments, the crankshaft was hanged in the laboratory and impact testing was applied to obtain FRF by a two channels FFT analyzer. Since the FRF is independent from input forces and actually it shows the inherent characteristics of the structure at the measuring points, FRF was measured just at drive points for each crankshaft. Finally, based on theoretical and experimental results, it is concluded that the cast-iron crankshaft is better to be used in NISSAN-2400 engines than steel crankshafts.
  K. Kheiralipour , A. Tabatabaeefar , H. Mobli , S. Rafiee , A. Sahraroo Sahraroo , A. Rajabipour and A. Jafari
  Several physical properties as physical characteristics, mechanical, hydrodynamic and nutritional properties of two apple varieties (Redspar and Delbarstival), were determined and compared using Duncan`s multiple ranges test. Physical characteristics such as: average fruit length, width, thickness, the geometric, arithmetic and equivalent mean diameter, projected area, surface area, sphericity index, aspect ratio, fruit mass, volume, true density and moisture content, were determined for both varieties. The coefficient of static friction on plastic, plywood and galvanized iron, flesh firmness, failure stress, modulus of elasticity were found. The terminal velocity, coming up time, bouncy and drag forces, as hydrodynamic properties and total dry matter, total soluble solid, pH and titratable acidity, as nutritional properties, were determined. It was concluded that most of properties of two apple varieties was statistically different at the one percent probability level.
 
 
 
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