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modern engineering material
相关语句
  现代工程材料
     Modern engineering material and prospect of its research
     现代工程材料研究特点及展望
短句来源
     The definition, content and importance of modern engineering material were discussed, the characteristic of its recent research was summarized and the development of its research was looked forward, enlightenment to the researchers in modern engineering material science was hoping to given.
     阐述了现代工程材料的定义、包含内容及对其研究的重要性 ,并对近期现代工程材料研究的特点做了总结和展望 ,以期给现代工程材料的研究者以启迪
短句来源
  “modern engineering material”译为未确定词的双语例句
     As a modern engineering material quickly developed in the latter half of the 20th century, non-metallic Fiber Reinforced Plastic Concrete is renowned for its wide applications.
     非金属纤维增强塑料是本世纪后半期迅速发展起来的新型工程材料材,应用前景十分广阔。
短句来源
  相似匹配句对
     Modern Manufacturing Engineering
     现代制造工程
短句来源
     On Engineering
     论工程
短句来源
     Important Frontiner of Modern Engineering
     当代工程技术的重要前沿
短句来源
     MODERN IT
     摩登数码
短句来源
     Modern;
     教育现代化是中国现代化之母。
短句来源
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  modern engineering material
Finally, fire resistance is an important driver in the aim to achieve wider use of wood as a modern engineering material.
      


This article presents a new anti-corrosive and wear-resistant treatment technique for modern engineering materials.

本文是介绍现代工程材料防腐和耐磨处理新技术。

Ferroelectric ceramics are an important class of modern engineering materials and have received increasing attention for their distinctive properties and applications For example, they are used as modulators, deflectors, optical memories imaging devices and so on With the wider use of the materials and harsher requirement of their performances, the study of coupling electric and mechanical behavior has attracted great interests The main effort of this paper is to obtain the constitutive relation...

Ferroelectric ceramics are an important class of modern engineering materials and have received increasing attention for their distinctive properties and applications For example, they are used as modulators, deflectors, optical memories imaging devices and so on With the wider use of the materials and harsher requirement of their performances, the study of coupling electric and mechanical behavior has attracted great interests The main effort of this paper is to obtain the constitutive relation of ferroelectric ceramics It is well known that ferroelectric ceramics take on ferroelectric phases when the temperature is below the Courier point Domains appear during the ferroelectric transformation Experiments have shown that domain switching is the main source of nonlinearity in ferroelectric ceramics, which is also the base of the theory proposed in this paper In the model, ferroelectric ceramics are treated as an agglomerate of domains, and each grain is supposed to be a single domain and assumed as an inclusion The Orientation Distribution Function, or noted as ODF, is used to describe the domain patterns The Helmholtz free energy and the complementary Helmholtz free energy of a constituent element are obtained by expanding the Mori-Tanaka mean field theory The classic internal variable theory was also extended and applied to analyze the constitutive relations of ferroelectric ceramics Finally a theoretical constitute law in terms of the internal functional theory was developed to describe the nonlinearities and hysteresis in the ferroelectric behavior By way of taking ODF as Fourier's expansion, we obtained the yielding conditions and the evolution equations of ODF The proposed constitute relation is simplified to an in-plane problem in the paper, so that ODF can be simplified as one dimensional Fourier′s expansion Two simple loading cases, electric field loading and compressive stress loading, are considered for the numerical calculation Numerical results based on the theory are compared to the experimental results, which indicates that the theory is reasonable and applicable The theoretical results give insight into the evolution of the microstructures associated with domain switching and into the source of the observed hysteresis of ferroelectric ceramics In this model, there are two contributions to the nonlinearities One is the direct effect of domain switching induced by either stress or electric field, and the second is the dependence of the macroscopic piezoelectric coefficients of the ceramics on the overall polarization of the ferroelectric materials It must be pointed out that the constitutive law was only compared with the uniaxial experimental data, therefore, it must be substantiated by the multiaxial loading data though so far there are not any available data from multiaxial testing for the ferroelectric ceramics

在居里温度以下,铁电陶瓷呈铁电相,具有许多取向不同的铁电畴,取向分布函数描述了铁电畴的取向分布情况文中推广了经典的内变量理论,采用宏细观相结合的方法,建立了铁电陶瓷的宏观行为与细观结构的关系,给出了铁电陶瓷的屈服条件,屈服面的演化规律及取向分布函数的演化规律计算得出了与实验比较符合的电位移-电场关系曲线及应变电场-蝶形关系曲线

Based on the fundamental requirements of manufacturing technology for engineering material shaping and manufacturing processing in modern engineering education, the paper strives to embody the interraction and integration of different disciplines, combines theory with practice, creativity and moderneducational technology. Under the conditions of broad engineering background,course system is set up with main teaching contents of modern engineering material shaping and manufacturing processing base. This...

Based on the fundamental requirements of manufacturing technology for engineering material shaping and manufacturing processing in modern engineering education, the paper strives to embody the interraction and integration of different disciplines, combines theory with practice, creativity and moderneducational technology. Under the conditions of broad engineering background,course system is set up with main teaching contents of modern engineering material shaping and manufacturing processing base. This system is characterized by creative teaching, features of interraction and integration of different disciplines, and realization of the integration of practices and experiments.

文章以现代工科教育中制造技术对工程材料成型和制造工艺基础的基本要求为出发点 ,力求体现各学科的交叉、融合 ,使理论、实践、创新和现代教育技术有机地结合在一起 ,并在此基础上构建了在大工程背景下 ,以现代工程材料成型与制造工艺基础为主要教学内容 ,以创新教学为特色 ,体现各学科的交叉、融合特点 ,实习实验一体化的课程体系

 
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