Development of Methodology for Main Pipelines Linear Section Stress-Strain State Сhanges Assessment
Liubomyr Zhovtulia,
Andriy Oliynyk,
Andriy Yavorskyi,
Maksym Karpash,
Iryna Vashchyshak
Issue:
Volume 2, Issue 6, November 2017
Pages:
66-71
Received:
29 August 2017
Accepted:
26 September 2017
Published:
1 December 2017
Abstract: The linear section of main oil and gas pipelines, which are potentially the most dangerous type of pipeline networks, was selected as the object of investigation. A technique for assessing the stress-strain state of the pipeline was developed. Underground pipeline deformation process was mathematically modeled according to the set of points displacement. The process of the underground pipeline points position determination process, estimation of the interpolation accuracy of the underground pipeline spatial position, interpolation step and smoothing parameters determination were described.
Abstract: The linear section of main oil and gas pipelines, which are potentially the most dangerous type of pipeline networks, was selected as the object of investigation. A technique for assessing the stress-strain state of the pipeline was developed. Underground pipeline deformation process was mathematically modeled according to the set of points displac...
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Improvement of Lubrication and Cooling in Grinding by Effective Controlling of Air Boundary
Sujit Majumdar,
Suraj Kumar,
Debasish Roy,
Samik Chakraborty
Issue:
Volume 2, Issue 6, November 2017
Pages:
72-81
Received:
5 September 2017
Accepted:
26 December 2017
Published:
16 January 2018
Abstract: The presence of air around a rotating grinding wheel impedes the effective entry of coolant into grinding zone. Therefore, a proficient method is required to minimize this air boundary before the impingement of fluid-jet into the grinding zone. This paper is an experimental study for finding the better effective method of controlling the air boundary around the wheel. Further, two different techniques of suppressing the air barrier has been studied experimentally and statistically towards improving the cutting fluid action in grinding. Fuzzy models are developed to interpret the relationship between the variables and responses. Experiments are conducted on a horizontal surface grinding machine with the application of scraper board and pneumatic barrier separately behind the flood cooling nozzle. The surface roughness and other mechanical properties of these two methods and traditional flood cooling method are compared. The experimental results specified that the tangential force and the requirement of specific energy are reduced by maximum 25% and 20% respectively by the scraper board (SB) with the comparison to the pneumatic barrier (PnB) method for achieving the equivalent surface quality when tested by positioning them at 60° location from grinding zone. Hence, use of scraper board at close proximity to grinding zone is recommended.
Abstract: The presence of air around a rotating grinding wheel impedes the effective entry of coolant into grinding zone. Therefore, a proficient method is required to minimize this air boundary before the impingement of fluid-jet into the grinding zone. This paper is an experimental study for finding the better effective method of controlling the air bounda...
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Finite Element Simulation of Deep Drawing of Aluminium Alloy Sheets
Shaik Himam Saheb,
M. Sree Hari,
Annam Vijay Kumar
Issue:
Volume 2, Issue 6, November 2017
Pages:
83-102
Received:
5 October 2017
Accepted:
1 November 2017
Published:
16 January 2018
Abstract: More and more automobile companies are going for weight reduction of their vehicles for fuel economy and pollution control. The objective of the present study is to determine the effect of blank temperature on forming behaviour of sheets and damage factor of aluminium sheet alloys of 6061 and 7075 at elevated temperatures. Although the aluminium alloys have high-strength to weight ratio and good corrosion resistance, the low formability of aluminium sheets limits their use in some products with complex shapes, such as automotive body parts. The elevated forming process is intended to overcome this problem. An insight into such a study will throw light on the different temperatures required by the above materials when they are made into TWBs. Using ANSYS a series of simulations were carried out in the present investigation on the formability behaviour of deep drawing of aluminium alloys in the temperature range 200-500°C.
Abstract: More and more automobile companies are going for weight reduction of their vehicles for fuel economy and pollution control. The objective of the present study is to determine the effect of blank temperature on forming behaviour of sheets and damage factor of aluminium sheet alloys of 6061 and 7075 at elevated temperatures. Although the aluminium al...
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