An Experimental Study on Composites Machining Using Abrasive Water Jet Technology

2009 ◽  
Vol 407-408 ◽  
pp. 582-585
Author(s):  
Hai Tang Cen ◽  
Lu Xing Chi ◽  
Hui Li
Keyword(s):  
Experimental Study ◽  
Thermal Effects ◽  
Conventional Technique ◽  
Empirical Models ◽  
Abrasive Water Jet ◽  
Optimal Parameters ◽  
New Materials ◽  
Tool Wear Rate ◽  
Hole Quality ◽  
Awj Cutting

Composite when machined with conventional technique often results in fibre damage, interlaminate failure, poor hole quality and high tool wear rate. The flexibility and cool cutting characteristics of the AWJ make it an important tool for cutting applications of new materials such as composites. It has been shown that using AWJ cutting with optimal parameters for Bakelite, interlayer GFRP and normal GFRP can be a viable and effective alternative with good kerf quality and few problems such as thermal effects, delamination and burr. The empirical models of the levert of GFRP has revealed that AWJ technology has a great of advantages on machining complicate shaped and interstitium workpieces

Experimental Study of Thermal Effects in the Sterilization of Disperse Systems

2001 ◽  
Vol 32 (4-6) ◽  
pp. 5
Author(s):  
A. A. Dolinsky ◽  
Yu. A. Shurchkova ◽  
B. I. Basok ◽  
T. S. Ryzhkova
Keyword(s):  
Experimental Study ◽  
Thermal Effects ◽  
Disperse Systems

Deposition Prediction of Debris Flow Alluvial Fan Based on Experimental Study

2012 ◽  
Vol 518-523 ◽  
pp. 4819-4822
Author(s):  
Jin Feng Liu ◽  
Shun Yang ◽  
Guo Qiang Ou
Keyword(s):  
Experimental Study ◽  
Debris Flow ◽  
Statistical Method ◽  
Laboratory Experiments ◽  
Empirical Models ◽  
Alluvial Fan ◽  
Disaster Prevention ◽  
Average Accuracy ◽  
Hazardous Area ◽  
Debris Flow Disaster

The deposition prediction of debris flow hazardous area is very important for organizing and implementing debris flow disaster prevention and reduction. This paper selected the data base from laboratory experiments and applied the multiple regression statistical method to establish a series of empirical calculation models for delimiting the debris flow hazardous areas on the alluvial fan. The empirical models for predicting the maximum deposition length (Lc), the maximum deposition width (Bmax) and the maximum deposition thichness (Z0) under the condition of different debris flow volumes (V), densities (rm) and slopes of accumulation area (θd) were establised. And the verification results indicated that the established models can predict the debris flow hazards area with the average accuracy of 86%.

Thermal effects on GFRP rebars: experimental study and analytical analysis

2009 ◽  
Vol 43 (6) ◽  
pp. 775-788 ◽  
Author(s):  
Abdelmonem Masmoudi ◽  
Radhouane Masmoudi ◽  
Mongi Ben Ouezdou
Keyword(s):  
Experimental Study ◽  
Thermal Effects ◽  
Analytical Analysis ◽  
Gfrp Rebars

Computational and Experimental Study of Laser Microwelding Processes for Electronic Packaging

2001 ◽  
Author(s):  
Wei Han ◽  
Ryszard J. Pryputniewicz
Keyword(s):  
Experimental Study ◽  
Electronic Packaging ◽  
Thermal Effects ◽  
Resistance Welding ◽  
Alternative Methods ◽  
Number Of Components ◽  
Computational Data ◽  
Computational Methodology ◽  
Laser Microwelding

Abstract Advances in microelectronics depend on reliable packaging. As sizes of components decrease and number of components per package increases, demands on interconnections, or joining, of two parts, e.g., wire to tab, or tab to tab, increase rapidly. Since traditional joining techniques, such as resistance welding, may no longer produce satisfactory microinterconnections, alternative methods are being developed. One of such methods is based on laser microwelding. In this paper, we discuss fundamental processes involved in laser microwelding, outline a computational methodology to simulate thermal effects produced, describe facilities used, present results, and summarize correlations between the experimental and computational data for applications in electronic packaging.

Miniaturization of injection abrasive water jet machining process

2006 ◽  
Vol 220 (11) ◽  
pp. 1697-1705 ◽  
Author(s):  
H Orbanic ◽  
B Jurisevic ◽  
D Kramar ◽  
M Grah ◽  
M Junkar
Keyword(s):  
Water Jet ◽  
Heat Sinks ◽  
Machining Process ◽  
Process Efficiency ◽  
Abrasive Water Jet ◽  
Element Analysis ◽  
Abrasive Particles ◽  
Cutting Head ◽  
Simulation Based ◽  
Awj Cutting

This contribution presents the possibilities of applying abrasive water jet (AWJ) technology for multi-material micromanufacture. The working principles of injection and suspension AWJ systems are presented. Characteristics of this technology, such as the ability to machine virtually any kind of material and the absence of a relevant heat-affected zone, are given, especially those from which the production of microcomponents can benefit. A few attempts to miniaturize the AWJ machining process are described in the state-of-the-art preview. In order to develop and improve the AWJ as a microtool, a numerical simulation based on the finite element analysis is introduced to evaluate the effect of the size abrasive particles and the process efficiency of microsized AWJ. An ongoing project in which an improved mini AWJ cutting head is being developed, is presented. Finally, the possible fields of application are given, including a case study on the machining of miniaturized heat sinks.

Numerical Simulation and Experimental Study on Thermal Effects of 2.94 μm Er:YAG Laser

2012 ◽  
Vol 32 (6) ◽  
pp. 0614002 ◽  
Author(s):  
杨经纬 Yang Jingwei ◽  
王礼 Wang Li ◽  
吴先友 Wu Xianyou ◽  
江海河 Jiang Haihe
Keyword(s):  
Numerical Simulation ◽  
Experimental Study ◽  
Thermal Effects ◽  
Er:Yag Laser

Compressive Strength of Concrete from Lightweight Bubbles Aggregate

2015 ◽  
Vol 754-755 ◽  
pp. 348-353 ◽  
Author(s):  
Norlia Mohamad Ibrahim ◽  
Leong Qi Wen ◽  
Mustaqqim Abdul Rahim ◽  
Khairul Nizar Ismail ◽  
Roshazita Che Amat ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Compressive Strength ◽  
Natural Resources ◽  
Concrete Structure ◽  
Concrete Mixture ◽  
New Materials ◽  
Concrete Mixtures ◽  
Compressive Strength Of Concrete

Compressive strength of concrete is the major mechanical properties of concrete that need to be focused on. Poor compressive strength will lead to low susceptibility of concrete structure towards designated actions. Many researches have been conducted to enhance the compressive strength of concrete by incorporating new materials in the concrete mixture. The dependencies towards natural resources can be reduced. Therefore, this paper presents the results of an experimental study concerning the incorporation of artificial lightweight bubbles aggregate (LBA) into cementations mixture in order to produce comparable compressive strength but at a lower densities. Three concrete mixtures containing various percentages of LBA, (10% - 50% of LBA) and one mixture used normal aggregate (NA) were prepared and characterized. The compressive strength of LBA in concrete was identified to be ranged between 39 MPa and 54 MPa. Meanwhile, the densities vary between 2000 kg/m3 to 2300 kg/m3.

Influence of Machining Parameters of the Drilling Polymers UHMW-PE and PTFE

2015 ◽  
Vol 1120-1121 ◽  
pp. 1297-1301 ◽  
Author(s):  
Breno Ferreira Lizardo ◽  
Luciano Machado Gomes Vieira ◽  
Juan Carlos Campos Rubio ◽  
Marcelo Araújo Câmara
Keyword(s):  
Thrust Force ◽  
Polymeric Materials ◽  
Machining Parameters ◽  
New Materials ◽  
Hole Quality ◽  
Tool Geometries ◽  
Dimensional Deviation ◽  
Fiber Metal ◽  
Ultra High Molecular Weight ◽  
Quality Surface

Over the years, with the increasing development of engineering materials, the emergence of new composites, fiber metal laminated, biomaterials, metal alloys etc., and with demand for products less expensive, less polluting and more efficient, the manufacturing engineering also needs to develop to be able to process these new materials. Materials and tool geometries, intelligent mechanisms, modular machines, also follow this setting. To that end, this work comes to raise the main parameters that influence in the hole quality surface of finished product. Were used two polymeric materials, ultra high molecular weight polyethylene (UHMW-PE) and polytetrafluoroethylene (PTFE), two feed rates, three rotations and three tool geometries, allowing to identify which of these parameters have greater influence on the thrust force and the characteristics of the finished product and dimensional deviation.

Experimental study on abrasive water jet machining of AA5083 in a range of thicknesses

2018 ◽  
Vol 8 (3) ◽  
pp. 218 ◽  
Author(s):  
Gurusamy Selvakumar ◽  
Shanmuga Sundaram Ram Prakash ◽  
Nagarajan Lenin
Keyword(s):  
Experimental Study ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Abrasive Water Jet Machining
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