Mehran Moradi
Assistant Professor, Mechanical Engineering Department, Isfahan University of Technology
[ 1 ] - Analysis of PVC Frames Cutting by Guillotine and Presenting Solution on Preventing Imperfection
PVC frame cutting process by guillotine is a common method that attracted attention of car parts and PVC decorating furniture producers. In this paper, the effects of main parameters such as cutting speed, lubricants and cutting frame holder pressure force on PVC frame section surface smoothness is investigated by experimental methods on a specified PVC frame sample and then by FEM simulation u...
[ 2 ] - Numerical Determination of the Forming Limit Diagram for 304 Stainless Steel Based on Phase Change in Deep Drawing Process
Up to now a large number of models have been developed to measure or predict the damage in equipments. Some of these models have been implemented in ABAQUS software. To implement damage parameters in the software, it is necessary to perform complex and expensive practical tests. One of these damage models is Forming Limit Diagram (FLD).The purpose of this research is deriving required parameter...
[ 3 ] - Propagation of Crack in Linear Elastic Materials with Considering Crack Path Correction Factor
Modeling of crack propagation by a finite element method under mixed mode conditions is of prime importance in the fracture mechanics. This article describes an application of finite element method to the analysis of mixed mode crack growth in linear elastic fracture mechanics. Crack - growth process is simulated by an incremental crack-extension analysis based on the maximum principal stress c...
[ 4 ] - حل عددی فرایند فورج شعاعی چندپاسة سوپرآلیاژ اینکونل 718 و مقایسة آن با نتایج تجربی
فرایند فورج شعاعی از جمله فرایندهای فورج قالب‌باز است که برای افزایش استحکام و کاهش عیوب داخلی استفاده می‌شود. از این فرایند جهت کاهش قطر محور‌ها، محورهای پله‌دار و ساخت لوله‌هایی با پروفیل داخلی استفاده می‌گردد. هدف از این مقاله، شبیه‌سازی یک مدل ترمومکانیکی به‌صورت یک آنالیز کوپل دینامیک - حرارت جهت پیش‌بینی نیروی لازم انجام فرایند فورج اینکونل 718[i]، تأثیر دمای اولیه بر نیروی مورد نیاز فورج...
[ 5 ] - Pattern of Residual Stress in Rail by FEM Analysis and Strain Gage Sectioning Technique
Final step of rail manufacturing is cold rolling straightening process and it hassignificant effects on mechanical properties, straightness, flatness and development of residualstresses. Measurement of residual stresses after straightening process is obligated by railmanufacturing standards. In the present investigation, an attempt has been made to evaluateresidual stresses after straightening ...
[ 6 ] - Simulation of a Microgripper with Electrothermal Actuator Using COMSOL Software Based on the Finite Element Method
Micro-electro-mechanical systems (MEMs) are Combination of electrical and mechanical components in Micron dimensions. In recent years, holding, actuating methods and handling of MEMs components such as microgripper, microsensors and etc. have been deeply studied. Microgrippers for handling, positioning and assembling of micro components are very useful so that for clamping need actuation create...
[ 7 ] - Analytical, Experimental and Finite Element Investigation of Internal Pressure Effect in Hydroforming Process on Metallic Bellows Produced from Thin Wall Tube of Austenitic Stainless Steel Grade 316L
One of the bellows producing method is hydroforming process .Whereas some factor of hydroforming process specially internal pressure affects on final characteristics produced bellows such as bursting, wrinkling and wall thickness distribution. In this paper the effect of internal pressure factor in final quality of produced bellows will be investigated. In simulation of process, ABAQUS/Explicit...
[ 8 ] - تحلیل انتشار امواج الاستیک درون هدایت کننده کریستال فونونیک فولاد- اپوکسی به‌کمک روش تفاضل محدود بر مبنای جابه‌جایی
In order to obtain transmission spectra through a phononic crystal as well as its waveguide, a new algorithm is presented in this paper. By extracting displacement-based forms of elastic wave equations and their discretization, Displacement- Based Finite Difference Time Domain (DBFDTD) algorithm is presented. Two numerical examples are solvcd with this method and the results are compared with t...
[ 9 ] - Simulation of a Microgripper with Electrothermal Actuator Using COMSOL Software Based on the Finite Element Method
Micro-electro-mechanical systems (MEMs) are Combination of electrical and mechanical components in Micron dimensions. In recent years, holding, actuating methods and handling of MEMs components such as microgripper, microsensors and etc. have been deeply studied. Microgrippers for handling, positioning and assembling of micro components are very useful so that for clamping need actuation create...
[ 10 ] - Analytical, Experimental and Finite Element Investigation of Internal Pressure Effect in Hydroforming Process on Metallic Bellows Produced from Thin Wall Tube of Austenitic Stainless Steel Grade 316L
One of the bellows producing method is hydroforming process .Whereas some factor of hydroforming process specially internal pressure affects on final characteristics produced bellows such as bursting, wrinkling and wall thickness distribution. In this paper the effect of internal pressure factor in final quality of produced bellows will be investigated. In simulation of process, ABAQUS/Explicit...
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