Since passed patent 1991, attrition agitate frit is received (FSW) the aluminium alloy that applies already extensively at joint high strenth. Aviation industry has begun to use this technology, the airbus that includes one of Europe's biggest airline, the frit that how applies attrition agitate in research receives a technology to reduce production cost. Technology of aluminium alloy joint -- attrition agitate frit is received (FSW) offerred improvement degree has exceeded arc solder or riveting, have the frit with taller, lighter intensity to be received, and treatment efficiency is taller. Receive to the aluminium alloy frit of special union particularly effective, frit receives the form decrescent of the process, but frit is received thick sectional, such treatment frit receives prop to have wonderful physical characteristic. In the process in FSW (graph 1) , what by the axis shoulder and whorl state shot sell composition one is cylindrical tool, rotate and insert the juncture between two metals. Gyral axial shoulder and needle are sold will produce heat, but unapt fuse the metal and oxidation, make material becomes soft however but model, form air hole, have the solid look of subtle grain material. In order to smash, agitate and forging means, produce the miniature structure joint with a more exquisite talent that compare a mother, this process even can the aluminium alloy that joint is illogical, FSW joint can have rivet the double intensity of joint. Graph 1: Attrition agitate frit is received in, axial shoulder places the face in the metal, by attrition produces heat, sell agitate to produce hot, model to change material to realize frit to receive when the needle. (the picture is offerred by Eclipse Aviation company) aviation industry already used FSW technology FSW to already applied on all sorts of industry, include spaceflight industry. This technical application is received slower in commercial aircraft, because spaceflight manufacturer is before the investment that has huge fund, must decide the dependability of this technology. So far, only one is located in new Mexico city Abukuiji the spaceflight manufactory of city -- Eclipse Aviation company uses this technology. Eclipse Aviation company made 6 people jet " Eclipse 500 " , this company report points out, because large element uses the beneficial result of the sources of energy that FSW produces, having an advantage economically. This technology can have used the joint length in 1000 meters successfully, need is many fill solder or do not defend crowded, do not need a solderer to have solder excellently technology, also do not need abrade, brush divide or pickling. Graph 2: The model of multiple geometry much physics that attrition agitate frit receives, three-dimensional heat analyses coupling to flow to agitate of 2 dimension axial symmetry be informed this advantage, airbus company of Europe plans to introduce this technology to come its production factory. Riveting job rate is slow, belong to labor concentrated model, with soldering continuously means replaces riveting to be able to reduce cost quickly not only, still can gain higher joint strength. However, because air bus is on experience, need to bear taller stress and have briefer fatigue life, this technology must ensure exceedingly reliable on product line. This technology reachs all sorts of operation factor in a lot of respects, the heat that can affect whole and solder character, be like: Speed of appearance of diameter of raw material, tool, tool, choice, solder floating rate reachs next pressure. Use the data in commercial plane, machine program must maximize. Frit of use COMSOL imitate is received above all, the mathematical model result that research plans to want to build a FSW, the computational temperature that use airbus engineer sees easily frit is received distributings the change that reachs miniature structure. Carry out this model to make airbus engineer easy, study the group builds tool of simulation of user interface of a graph, so they can see frit receives the temperature character of the path and final strength. Study a group with COMSOL Multiphysics imitate three-dimensional hot issue, for computational thermal current, will calculate with mode of 2 dimension axial symmetry the generation of flow and hot field. (graph 2) computation of this hot analysis is three-dimensional temperature field is in from pressurization the hot flow of tool surface, grab the effect that the tool flows, hot attrib border condition, and the heat that material solders is characteristic. When the model squashs, temperature distributings stand by tool surface to arrive from three-dimensional border the field region in 2 dimension model. It is the 2 dimension section plane that passes through axial shoulder ground next, the whirl that analyses data flows. Final step is, from this section plane the heat of computational whole journey fuses, and remand three-dimensional analysis. This analysis uses specific module interface, the heat that uses 2 dimension and three-dimensional model is conducted reach chemical project module and tool, and coupling commutation factor. Use 2 dimension to build modular field to be able to save computational memory and time, result and shed the photograph of complete and three-dimensional model of field to come than having 1% only the error of 2% , the process that synchronism solves an analysis will assure faster better convergent outcome. To make this technology is carried out easily, research group use COMSOL Script builds graphical user interface (graph 3) . From next pulling menu chooses material, can decide miniature structure (the material in the character of Micro-structural) and material library affects, the user is OK also the value of set geometry appearance, and revise parameter. The program can be worth automatic scale according to the temperature on the differentia on cross section isothermal, calculate next structure of consistency material miniature. Final scale is three-dimensional hot profile, the engineer can be calculated different statistical data, sell endmost frit to receive material temperature in humeral stage and needle for example, or it is power or caloric output. COMSOL builds a model to ask in the light of the model, understand very easily why COMSOL Multiphysics is optimal choice, it is to be used easily not only, still can connect physical quantity of 2 dimension axial symmetry arrives three-dimensional physical quantity, other software accomplishs this a little bit very hard. COMSOL Multiphysics connects research group is developed very easily also be based on MATLAB (MathWorks company product) the platform about miniature construction material. The person that the tool of COMSOL Script allows to use builds user graph interface, the engineers that use an airbus execute the function of this model. The airbus funds the 2nd acting plan, allow to study the group improves a model, undertake an analysis to structure of the heat of this project and miniature. COMSOL Multiphysics has stretch ability to simplify complex physics program, it is the substantial with this indispensable job. In addition, FSW is a very complex process, study the group still wants to do much experimentation to undertake test and verify, make this model more reliable, accurate. COMSOL is in China, in company of copy science and technology (CnTech Co. , what the market with the solution by right of individuation, mature CAE product line, professional Ltd) popularizes ability and strong technology to supported a service to win courtyard of domestic numerous scientific research to reach an industry so is consistent approbate, at present almost all and famous university and banner of the Chinese Academy of Sciences leave country the CAE that each institute already chose to use COMSOL Multiphysics to regard its as scientific research analysis is main tool. As in company of copy science and technology (CnTech Co.
, ltd) combines a center in technology of each branch of the whole nation, CAE, CAE grooms of the center hold water, offer more professional more considerate this locality to change technical service, at present numerous enterprise also chooses COMSOL Multiphysics to regard the analysis of the enterprise as the tool in succession, applied whole world is the most advanced production technology, enhance the core competition ability of the enterprise finally, made sure the company grows continuously. Yu Ruidian's Stockholm held water 1986 about COMSOL COMSOL company, already was in Belgian, Denmark, Finnish, France, Germany, Norwegian, Switzerland, England and American hemp city, California to wait at present establish a branch. The other information about the company can refer to Www.
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