留学作业Research report范文带专家评论

到这里我们已关于研究报告写作说了很多, 但百闻不如一见因此。因此,下面我们提供一份标准的研究报告的范文,而且我们的代写report专家还给出了评论。查看这篇范文之后,研报写作不再是一个问题!

标题页:

research report格式

摘要页:

Abstract

A simple apparat us is constructed in order to fatigues test heated nichrome wire under cycled strain. The purpose of the fatigue testing is to examine how the life span of hot nichrome wire varies with different temperatures, pretension treatments, strains, and clamp geometries. The resulting data from these tests are meant to provide the basis for improving the design of hot nichrome wire cutters used in a wide range of manufacturing processes. The theory and results of the strain cycling process are also briefly discussed.

research report范文

目录相当于指南针,能让读者一秒定位自己需要查阅的部分,所以这里的格式一定要统一,在每一次修改正文后都别忘了更新目录页,尤其是检查一下对应页码是都有误。

研究报告图的列表,这个列表确定了每个图的名称,排序号,以及图所在的页码。如果在你的报告中存在表格的话,你也需要把它放到这个列表中,或者在这个列表下面另做一个关于表格的列表也行。

1 Hot Wire Cutters: Superior Forming Tools

The increasing demand for plastic foams makes it desirable to improve the designer’s ability to process various foamstocks into finished parts. Earlier methods involve band saws and circular saws to cut the stock into an approximate shape. Details are then smoothed out by sanding. However, during the last 30 years, hot nichrome wire has become a more popular tool than conventional saws. Rather than separating material by tearing through it mechanically, the hot wire cutter melts the plastic foam as the two come into contact…

专家评论:简介部分阐述了存在的问题,研究的动机以及在该研究中要处理的目标。如果增加具体的图可以帮助读者快速地确定关键点,图文作为补充内容展示,会把问题描绘地更具体更清晰。

1.1 Disadvantages of Hot Wire Cutters

…Two major features diminish the practicality of the hot wire cutter when compared to that of mechanical cutting.

Tolerance. Because nichrome wire is thin and flexible, fast cutting operations may put a slight bend in the wire. The desired wire shape is linear. Hence, the cut may not follow the intended course by an amount dependent on the curve of the wire. The problem may be lessened by pre-tensioning the wire prior to clamping the ends. However, pre-tensioning lessens the life span of the wire.

Fatigue life. All cutting tools wear out or break after a certain amount of working time. Saw stend to last longer than hot wires. For manufacturers, this limitation of nichrome wires is expensive. Every time a cutting tool breaks, the production process must stop. Replacement of the part may take hours. This disruption idles the manufacturing operation and may be costly.

1.2 Research objectives

This investigation seeks to identify some approaches to prolonging the working life of nichrome wire in plastic foam cutting porcesses. Several viarables known to influence nichrome wire life are discussed theoretically and plotted against the life span of the hot nichrome wire. The variables include (1) temperature, (2) wire deflection, (3) wire pretension, and (4) clamp geometry. An apparatus for testing these influences is described, test results are given. And design suggestions are drawn from the results.

专家评论:注意结构清晰可以帮助读者更容易进入所述问题,在简介之后作者定义了具体的研究目标及其目的。

2 Theoretical Conditions of Fatigue

Each of the key variables that influence working life of nichrome wire may be understood in its theoretical design context by examining the forces at work.

2.1 Wire temperature

The temperature of nichrome wire may lead to degradation of the wire temperature for two resons. First, at high temperatures, most metals will evaporate. The typical operating range for nichrome cutting wire is between 250°C and 600°C …

2.2 Intrinsic Strain

The nichrome wire is often placed under the tension before it is clamped in place. This practice is followed because it lessens wire deflection during cutting and thus improves tolerances…

2.3 Clamp Geometry

The clamp geometry influences the strain distribution and magnitude at ends of nichrome wire. In contrast to the extrinsic strain caused by wire pre-tensioning and deflection, clamp geometry gives rise to local strain at the clamp edges…

专家评论:该理论部分概述了相关的物理原理,并且关键的变量也被引入,并且在该部分实验设备被介绍。在结果部分,作者提供有关数据来支撑自己的想法,但最好也是以图标形式补充介绍。

5 Discussion

Results of the test show that the main cause of nichrome wire failure is strain, as the wire cuts the sample and is deflected, D/L mm. The variables studied were found to influence wire life, Q, as follows.

5.1 Clamp Geometry

Clamp geometries affected both the life of the wire and the location of the most common wire failure. For example, in clamp geometry No. 1, the wire consistently failed in the region of maximum deflection, when bending over a rounded edge…

5.2 Wire Temperature

Although temperature variations did not notably influence the strength of the nichrome wire, hotter wires did reduce cutting drag, causing less deflection in any given material. This pattern can be seen…

5.3 Pretension

Pre-tensioning, as seen in Figures 4-8, significantly decreased the Fatigue life (Q) of the nichrome wires. Altough pretension is desirable for maintaining tolerance at higher cutting speeds, it does…

专家评论:讨论部分是用来解释实验结果并回复在简介中提到的问题的,接下来的总结部分着重强调了研究结果。

Conclusion

Designers for hot nichrome wire cutters should configure and produce the cutters in such ways as to minimize the strain placed by cutting materials on the wire. In this study, the four major factors of clamp geometry, wire temperature, cutting speed, and wire pretension have been shown to affect wire fatigue life in different ways. On the basis of these factors, the following design guidelines should be followed…

专家评论:结论部分判断了结果及其影响,并说明了研究的主要成果。

研究报告是对现有知识系统的补充,在研究过程中,研究者需要记录详细的研究过程与发现。随着步入大学,很多学生都需要撰写研究报告。但是要想写一份比较专业的研究报告常常令很多人头疼。如果在读完这篇文章之后,你还是有点迷糊,又怕不能把所有的事情都考虑进去,我们可以负责人地告诉你,现在有我们为你Edu Janes解决这一难题,我们的专家都是有着数十年report代写经验的专业人才, 服务的客户多不胜数,完全只得你的信赖。

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