|Title: The Cooling Rate Effect on the Buckling Strength and Elastic Properties of Heated Martensitic Stainless Steel Columns|
|Author(s): Ali Sadiq Yasir
|Pages: 01-07||Paper ID: 122203-4747-IJMME-IJENS||Published: June, 2012|
Abstract: The buckling strength of slender columns its important property especially for columns that subjected to axial compressive forces. In this paper, we study the effect of cooling rate after heating over (Ac3) for martensitic stainless steel columns on the buckling strength and elastic properties for different type of fixing for column. The results show that the best buckling strength occurs when using very slow cooling rate (inside furnace), that the buckling strength increased about (31%) and elastic modulus increased about (25%) because the slow cooling increase the formation of pearlitetic microstructure that had high strength and good elastic properties . The very fast cooling rate (in salt water) decreased the buckling strength about (46%) and elastic modulus about (51%) because the fast cooling rate increase the formation of martensitic microstructure that had high hardness and low buckling strength and low elastic properties.
|Keywords: Buckling strength, elastic modulus, martensitic stainless steel, cooling rate|
|Full Text (.pdf) | 488 KB|
|Title: Modeling of the impact on cylindrical composite shell as continuous patch loading|
|Author(s): Farzin Firouzabadi, Amran Ayob, M.R.Arjmandi, Soheil Gohari, Nayeleh Deirram
|Pages: 08-13||Paper ID: 1210003-7575-IJMME-IJENS||Published: June, 2012|
Abstract: Due to great properties, Composite materials are utilized in many applications in advance and accurate industries such as aerospace and fuel vessel structures. In contrast with all of the composite advantages, susceptibility of these materials to impact damage became a major concern recently. The aim of this research is to study the dynamic response of the composite cylindrical shell subjected to impact by modeling the impact loading as a continuous patch loading on the contact surface of cylinder. Radial deflection of the cylinder as of the most important parameter in dynamic response has been studied in this research using analytical approach and FEM method. In analytical approach proper governing equations are derived and represented in Matlab. In the second approach we used finite element analysis and ABAQUS software to determine the accuracy of the results obtained analytically. The present study concludes that, amount of the radial deformation of cylinder is at its highest value in contact point and it will decrease gradually by getting far away from impact point on circumferential path on the cylinder surface.
|Keywords: Cylindrical Composite shell, Finite element analysis, Impact, Radial Deflection|
|Full Text (.pdf) | 185 KB|
|Title: Industrial Benchmarking: A Critical Research and Practices in Automotive Manufacturing Unit|
|Author(s): Mohammad Israr, Anshul Gangele
|Pages: 14-26||Paper ID: 1210503-1919-IJMME-IJENS||Published: June, 2012|
Abstract: This paper is based on a survey conducted on top management’s awareness and understanding of benchmarking in Indian automotive manufacturing companies. The main objective of this paper is to provide empirical evidence on top management’s awareness and understanding of the benchmarking technique and its role towards business survival and competitiveness. To achieve this objective, the authors developed a questionnaire comprising of fifthteen questions, checked for reliability and validity by experts and practitioners. The survey results and findings revealed that almost 17% are in the very good category, about 55% of the respondents companies are still in the moderate category, nearly 22% are in the low category and 6% have very little understanding and knowledge as regards to benchmarking. In summary, the survey analysis showed large majority of the Indian companies involves in the automotive manufacturing sector still experiencing lack of knowledge as regards to the benchmarking concept and its role towards enhancing their business process effectiveness and competitiveness. The paper culminates with discussions and conclusions, focusing on recommending the steps that should be taken by the Indian government through its agencies such India Productivity Corporation (IPC) and Small & Medium Industry Development Corporation (SMIDEC) in encouraging more companies to use the benchmarking A Survey on Benchmarking Understanding and Knowledge Among Indian Automotive Components Manufacturing SMEs 386 technique in their pursuit to survive and be more competitive in the local, regional and global market.
|Keywords: Benchmarking, competitiveness, survey, performance, survival, customer satisfaction|
|Full Text (.pdf) | 116 KB|