FLOW SIMULATION IN ABRASIVE WATER JET MACHINING OF GFRP COMPOSITE: THE EFFECT OF OPERATING PRESSURE AND STANDOFF DISTANCE ON KERF WIDTH
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN MECHANICAL AND ROBOTICS ENGINEERING
Author(s): ANJAIAH D , DEEPAK D , YAGNESH SHARMA N
Abstract: Abrasive Water Jet (AWJ) machining is a relatively new nontraditional machine tool used in machining of fiber reinforced composite. The quality of machined surface depends on various operating and material parameters. In the present work the effect of operating pressure and distance of the tool tip from target called the standoff distance (SOD) on AWJ characteristics is simulated using computational fluid dynamics (CFD). Computational domain was modeled based on experimental results of machining on Glass Fiber Reinforced Polymer (GFRP) composite. CFD results are compared with experimental output. The chosen parameters were found to have significant influence on the kerf width of work piece in AWJ machining. The effect on flow velocity in the domain is analyzed for the jet flow consisting of the mixture of garnet abrasives and water. It is found that distribution of jet velocity increases radially on work piece with the increase of SOD as well as operating pressure that result in wideni
- Publication Date: 09-Mar-2014
- DOI: 10.15224/978-1-63248-002-6-80
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A NOVEL DESIGN OF LIGHTWEIGHT ALUMINUM TUBULAR CRASH-BOX FOR CRASHWORTHINESS APPLICATION
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN MECHANICAL AND ROBOTICS ENGINEERING
Author(s): ABDEL MAGID HAMOUDA , FARIS TARLOCHAN , KHALIFA AL-KHALIFA , S.V. PERUMAL
Abstract: During a collision, the specific structures such as the frontal longitudinal and crash-box deforms plastically while absorbing substantial amount of kinetic energy. This energy absorbing characteristic has been designed in vehicles to reduce the severe injury of occupant. The design of such structures are very important because if these structures deform due to very high forces there is high risk to biomechanical damage of the vehicle occupants. Hence it is of upmost importance that the design of such structures maximizes the energy absorption while maintaining the peak force below an allowable threshold. The current work aims to design a new multi tube thin walled crash-box with these two crashworthiness performance measures being given much attention. The distance of the first plastic fold for the axial crushing was determined by simulation and this was used as a design input. This resulted in a near to ideal elastic-plastic behavior, increasing energy absorption and stable crushing
- Publication Date: 09-Mar-2014
- DOI: 10.15224/978-1-63248-002-6-81
- Views: 0
- Downloads: 0