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1、本科毕业设计外文资料翻译系 别： 工程技术系 专 业： 机械设计制造及其自动化 姓 名： 学 号： 2012 年 4 月 25 日外文资料翻译译文Microwave in walnut shell materials tensile mechanical properties of impact studyAbstractTaking the picking fresh walnuts as the research object, the microwave walnut break hull test, break hull rate of 87.65%; And of microwave
2、 effects on the walnut shell materials tensile mechanical properties of influence, and the results showed that the microwave processing, walnut shell material elastic modulus, tensile strength and mechanical indexes and processing there were no significant changes before. In addition, also in walnut
3、 shell tensile mechanical properties of the tested and won the walnut the tensile strength of the place relict limit to 1. 47 M Pa, for sure walnut emerged inflationary pressure in microwave needed to provide the reference.Keywords: microwave; Break hull; The whole shell tensile; Mechanical properti
4、es0 PrefaceWalnut machinery of the existence of high rate of broken emerged, the kernel rate is low has been restricted walnut realize mechanization production and processing of the important reason of our country, the development of walnut industrial caused certain influence. Therefore, explore new
5、 methods for realizing mechanization walnut emerged industrialization and export income, increase the economic benefit has urgent practical significance. At present, the technology for walnut mechanization emerged research focus on the gap emerged, blow for extrusion emerged, methods and the applica
6、tion of finite element method for related mechanical design emerged, but still has broken rate is high, the whole kernel rate low. In addition, the emerging technology used in the research is also emerged nuts is in the ascendant, such as YangRui etc in walnut laser irradiation behavior by the numer
7、ical analysis and simulation, explores the laser technology shelling mechanism; LiXiaoXia explores the buckwheat shell microwave method; ZhangLi, Yang fu Ephraim with microwave technology, realize the board of chestnut shell.The author on the basis of previous studies, of microwave technology functi
8、on mechanism of walnut emerged proposes that emerged walnut microwave method is feasible. This paper is to study this paper further discusses the front, to search for microwave processing technology parameters (power, time, humidity and temperature) in walnut shell material mechanics and the influen
9、ce law of nature, studied the microwave technology role walnut shell material stretching before and after the mechanical properties of differences, and determine the seam walnut the tensile strength of the limit in, to determine the walnut microwave emerged inflationary pressure and further guidance
10、 for microwave technology parameters are selected to provide the reference.1 Walnut microwave break hull testWalnut is primarily through microwave microwave break hull role in walnutmeat, its internal water molecules in alternating under the influence of electromagnetic field polarization orientatio
11、n for high frequency shift, the internal walnut in short time produce very high quantity of heat form high pressure water vapor, when water vapor pressure of the pressure of walnut is inflation pressure is greater than the ultimate tensile stress walnut, walnut burst. Therefore, the density of the n
12、ut shell is its internal structure formed an important guarantee of high pressure; The walnuts contain moisture is internally generated the material basis of high pressure water vapor; Microwave technology parameters (power, time and temperature, etc) is able to rupture external power of walnut. The
13、refore, it is necessary to walnut microwave technology needed to break hull parameters were tested.1.1 materials and equipmentTest is just picked off cortical JinLong 1 cotton walnut as the research object, the walnuts moisture content of 21%, to prevent water loss, will test sample in a plastic bag
14、 sealed stored in the refrigerator for refrigeration.W LD 07S-08 type glanze microwave ovens, microwave role, power and temperature are time adjustable; Vernier gauges.1.2 test methodThe three factors 3 level completely combination test, each portfolio selection three shape, size close of walnut sim
15、ilar as repeated samples. Before the test test walnut trunnion, diameter, caliper size. The end, observation and rupture of walnut recorded.1.3results and analysisWalnut microwave break hull situation as is shown in table 1. Table 1 walnut microwave break hull test results Group numberTemperaturePowerWTimeminBroken shell /%1503002100250300366.7350300433.345050021005505003100650500466.77507002100850700366.795070041001060300266.71160300366.712603004100136050021001460500310015605004100
