外文翻译--微波对核桃壳体材料拉伸力学性质的影响研究

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1、中文 3300 字 ,2180 单词 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 study Abstract Taking the picking fresh walnuts as the research object, the microwave walnut break hull test, break hull rate

2、 of 87.65%； And of microwave 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.

3、 In addition, also in walnut 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

4、 tensile； Mechanical properties 0 Preface Walnut 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 in

5、fluence. Therefore, explore new 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 e

6、merged, methods and the application 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 ir

7、radiation behavior by the numerical 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

8、, of microwave technology function 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 ma

9、terial mechanics and the influence 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 inflationa

10、ry pressure and further guidance for microwave technology parameters are selected to provide the reference. 1 Walnut microwave break hull test Walnut is primarily through microwave microwave break hull role in walnutmeat, its internal water molecules in alternating under the influence of electromagn

11、etic field polarization orientation 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 burs

12、t. Therefore, the density of the nut 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 rup

13、ture external power of walnut. Therefore, it is necessary to walnut microwave technology needed to break hull parameters were tested. 1.1 materials and equipment Test is just picked off cortical JinLong 1 cotton walnut as the research object, the walnuts moisture content of 21%, to prevent water los

14、s, will test sample in a plastic bag 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 method The three factors 3 level completely combination test, each portfolio selectio

15、n three shape, size close of walnut similar as repeated samples. Before the test test walnut trunnion, diameter, caliper size. The end, observation and rupture of walnut recorded. 1.3results and analysis Walnut microwave break hull situation as is shown in table 1. Table 1 walnut microwave break hull test results Group number Temperature PowerW Timemin Broken shell /%