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Frequency: 12 issues per year
ISSN: 2250–3005 (online version)
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International Journal of Computational Engineering Research

(IJCER)

 

Articles

 

Research Article  open access
Design and Analysis of a Rocker Arm
Jafar Sharief || K.Durga Sushmitha
India
Paper Indexed : : 03.3005/05110105
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 11 (November 2015)

Abstract

Rocker arms are part of the valve-actuating mechanism. A rocker arm is designed to pivot on a pivot pin or shaft that is secured to a bracket. The bracket is mounted on the cylinder head. One end of a rocker arm is in contact with the top of the valve stem, and the other end is actuated by the camshaft. In installations where the camshaft is located below the cylinder head, the rocker arms are actuated by pushrods. The lifters have rollers which are forced by the valve springs to follow the profiles of the cams. Failure of rocker arm is a measure concern as it is one of the important components of push rod IC engines.Present work finds the various stresses under extreme load condition. For this we are modeling the arm using design software and the stressed regions are found out usingAnsys software. Here in this thesis we are observing that by changing different materials how the stresses are varying in the rocker arm under extreme load condition. And after comparing results we are proposing best suitable material for the rocker arm under extreme load conditions.

Keywords: Ansys, camshaft, pro-e and rocker arm

Research Article  open access
Stress Analysisofa Centrifugal Super ChargerImpeller Blade
Mohammed irafanuddin || K. Durga Sushmitha
India
Paper Indexed : : 03.3005/051106010
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 11 (November 2015)

Abstract

A supercharger is an air compressor that increases the pressure or density of air supplied to an internal combustion engine. This gives each intake cycle of the engine more oxygen, letting it burn more fuel and do more work, thus increasing power. Power for the supercharger can be provided mechanically by means of a belt, gear, shaft, or chain connected to the engine's crankshaft. Superchargers are a type of forced induction system. They compress the air flowing into the engine. The advantage of compressing the air is that it lets the engine squeeze more air into a cylinder, and more air means that more fuel can be added. Therefore, you get more power from each explosion in each cylinder. Here in this project we are designing the compressor wheel by using Pro-E and doing analysis by using FEA package. An attempt has been made to investigate the effect of pressure and induced stresses on the blade. By identifying the true design feature, the extended service life and long term stability is assured. A structural analysis has been carried out to investigate the stresses, strains and displacements of the blade. An attempt is also made to suggest the best material for an blade of a turbocharger by comparing the results obtained for different materials. Based on the results best material is recommended for the blade of a turbocharger.

Keywords: Air compressor, Ansys, FEA package and supercharger

Research Article  open access
Engendering sustainable socio-spatial environment for tourism activities in the south eastern nigeria: the place of environmental planning and management process.
Edmund A. Iyi || Celestine, O. Aniagolu || Benneth C. Ugwuanyi
Nigeria
Paper Indexed : : 03.3005/0511012017
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 11 (November 2015)

Abstract

The South Eastern part of Nigeria was a single state of the twelve states of Nigeria before 1976 – East Central State. Presently, the area is made up of five states. This Paper presents a study carried out to assess the possibility of knitting the once-one-state and presently five states, together to form a tourist destination worthy of international importance. Although the unprecedented dearth of infrastructural development in the zone continues to be a subject of discussion, little attention has been given to investigate the place of synergized intervention. Descriptive analysis was employed, in which the tourism potentials in the zone that are of national recognition were itemized. Data were collected on available amenities, resident population and accessibility of such potentials. Existing literature on various Environmental Management Systems were explored to elicit a system that is capable of affording a sustainable environment for tourism matters in the zone. The study revealed that the zone exhibits similar socio-economic and physical characteristics that are replete with potentials for improvement for optimum tourism utility in the entire zone. Several measures were advanced in the study to achieve this, chief of which is the adoption of the Environmental Planning and Management (EPM) process.

Keywords: Tourism destination, national significance, tourism potentials, EPM-process.

Research Article  open access
Strong (Weak) Triple Connected Domination Number of a Fuzzy Graph
N.Sarala || T.Kavitha
India
Paper Indexed : : 03.3005/0511018022
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 11 (November 2015)

Abstract

A subset S of V of a nontrivial fuzzy graph G is said to be strong (weak) triple connected dominating set, if S is a strong (weak) dominating set and the induced sub graph is a triple connected. The minimum cardinality taken over all strong (weak) triple connected dominating set is called the strong (weak) triple connected domination number and it denoted by stc (wtc).we introduce strong (weak) triple connected domination number of a fuzzy graphs and obtain some interesting results for this new parameter in fuzzy graphs.

Keywords: Connected dominating set, Fuzzy graphs,triple connected dominating set, strong (weak) triple connected dominating set

Research Article  open access
Development of a Cassava Starch Extraction Machine
Olutayo, L. A || Mogaji K.O || Fasoyin S.A
Nigeria
Paper Indexed : : 03.3005/0511023028
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 11 (November 2015)

Abstract

Cassava starch extraction machine that is easy to assemble, operate and maintain was developed and tested. The major components of the machine are hopper, mixing unit, extraction chamber which houses the screw conveyor (auger) and sieve, discharge outlets and the power unit. The machine was powered by 2 Kw electric motor. The working principle of the machine is by feeding cassava mash and water through the hopper, under gravity they both fall freely into the mixing unit, the rotated stirrers mixed the mash and water properly before it is discharged to the extraction chamber where the screw conveyor move and rotates it over a sieve thereby causing the moist starch to viberate.The machine was tested with 5kg TMS 30572 cassava mash with different water quantity (10 – 22)litres. It was observed that at 18litres of water and 120rpm stirrers speed. The output capacity was 25.2kg/hr and the extraction efficiency was 80%. The total cost of production of the machine was N86,400.00. The machine is recommended for small and medium producers of cassava starch

Keywords: Development, cassava starch, extraction, machine, production cost

Research Article  open access
The Myth of Softening behavior of the Cohesive Zone Model Exact derivation of yield drop behavior of wood
T.A.C.M. van der Put
Netherlands
Paper Indexed : : 03.3005/0511029043
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 11 (November 2015)

Abstract

It is shown that the postulate of strain softening of the fracture stress is based on the error to regard the nominal stress to be the actual, ultimate stress, at the actual area of the fracture plan. Strain sof-tening called yield drop is elastic unloading of the actual elastic stress at the intact, not ltimate, elas-tic loaded part of the specimen, outside the fracture zone. It appears that the Griffith theory only applies for the first yield drop until half unloading and further fracture follows from a ultimate stress criterion A small-crack merging mechanism explains precisely the "softening" called yield drop curve.

Keywords: wood, timber, fracture mechanics, limit analysis, strain softening, yield drop, fictitious crack model, cohesive zone model, continuum damage mechanics, small crack merging mechanism, molecular deformation kinetics,