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The damage represents complex mechanism. In this research based on T300/HT3 laminate structure, fatigue life is predicted phenomenologically, dealing mainly with in-plane stresses without accounting for out-of-plane failures such as craze. Fatigue modulus, based on damage mechanics, is used as a physical parameter which helps to describe the basic fatigue behaviors of unidirectional laminates and obtain expressions for cumulative damages defined by strains and stress. Based on some typical fatigue test data for unidirectional composite laminates, residual modulus sequence is found out.

本文以T300/HT3复合材料层压结构为研究对象，从唯象的观点出发，以损伤力学为基础构造损伤函数，考虑了剩余刚度和应变比率对复合材料的疲劳性能的影响，以这些变化着的机械性能作为损伤变量，建立了复合材料的疲劳损伤模型，基于层压板拉—拉疲劳试验数据，拟合出损伤模型中的参数，从而得到层压板拉—拉疲劳损伤变化规律，并建立损伤变量与内部损伤及疲劳寿命的联系，从而预测常幅应力作用下疲劳寿命。

The structure model of 5, 10, 15, 20-meso-tetraphenylporphyrin has been optimized by the first-principle calculation. The result shows that the angle between the benzenes and the porphine plane is 55°, and the rotation of the benzenes lead to a slight bending of the porphine plane.

利用第一性原理确定了四苯基卟啉分子的结构模型，结果表明分子中的苯环与卟吩骨架的夹角为55°，且笨环的自由旋转导致卟吩骨架略微偏离平面形状。

Based on the trigonometrical theory, the out-plane displacement can be obtained by measuring the in-plane displacement, and then the elasticity thermal stress of the chip is evaluated when the application of the temperature field is repeated.

根据三角法测量技术原理，将离面位移的测量转化为面内位移的测量，从而获得了芯片受热后的翘曲形变和弹性应变分布。

And it is easy that such sport plane is collected, can play at any time and place, conceal very convenient also, if do not have good guiding, such sport plane is used by minor play maize game, see maize movie, that grows to teenage health, the bad influence that estimates generation hard to the society.

而且这样的游戏机收藏容易，随时随地都可以玩，隐藏起来也很方便，如果没有良好的引导，这样的游戏机被未成年人用来玩黄色游戏、看黄色电影，那对青少年的健康成长、对社会都将产生难以估计的不良影响。

In this article the bulldozing shovel-soil contact system was studied by two-dimensional finite element method. The distributions of the stress and strain in soil were analyzed separately under plane stress situation as well as plane strain situation.

本文运用二维有限元方法对推土铲－土壤接触系统进行了研究，分别分析了平面应变问题和平面应力问题中土壤所产生的应力及应变分布状况；对比了它们在两类平面问题中的差异。

The coarsened structure perpendicular to primary crack plane exhibits better propagation resistance than that parallel with primary crack plane, but it seems that crack propagation property at high temperature can not be improved by changing γ′precipitates morphology.

颗粒形态不会改变裂纹扩展路径及微观机制，粗化结构的疲劳裂纹扩展阻力随温度升高而降低的趋势比原始结构剧烈，同时与主裂纹面垂直的粗化结构具有比与主裂纹面平行的粗化结构更好的疲劳裂纹扩展抗力，但通过改变γ′形态似乎不能改善高温下裂纹扩展性能。

Replacing the total reflecting mirror in the plane-parallel resonator by a compound TIR prism (so-called a plane-compound TIR prism resonator or a TIR prism resonator for short), the offset of output faculae was resolved satisfactorily.

根据泵浦光在聚光腔中的传播规律，提出了一种适合于小型化器件的相交圆柱聚光腔的设计方法。本文通过大量的实验和理论研究，完成了工程化的小型Cr〓：YAG被动调Q重频热传导自然冷却：YAG激光器的结构和参数设计，并确定了器件的最佳工作点，最后完成了样品机的生产。

The results show that some twin crystals and honeycomb structures appear in the shear plane and many kinds of deformation mechanism exist such as extruding, kinking and so on. When annealed at 550 ℃ for 2 h, the recrystal gains are observed in the shear plane. Especially the side receives the cut of guillotine, the size of recrystal grain is very thin, corresponding with the recrystal grains obtained by cold rolling at 80% deformation rate.

结果表明：经剪切变形后，切面处形成一种独特的带状变形孪晶和蜂窝状变形组织，且存在挤压、扭折等多种变形机制的作用；合金在550 ℃退火2 h后，切面出现许多再结晶晶粒，且在承受剪床切口的一边再结晶晶粒非常细小，相当于冷轧变形80%后的再结晶晶粒尺寸。

In short, this study has systematically researched the mechanical properties of rockmass structural plane by employing new theories and methods, and has made creativeachievements in controlling rock mass structural plane and raising the stability ofunderground stopes and tunnels. It is of great referential value for the design,construction and production of rock mass works, and so is it for enterprises in raisingeconomic benefits and ensuring production safety.

总之，本文采用新理论、新方法，系统地研究了岩体结构面的力学特征，对控制岩体结构面的方法、手段和措施及提高地下采场、巷道的稳定性等方面的研究取得了创造性成果，本文对解决岩体工程的设计、施工和生产中存在的问题，提高企业经济效益和确保生产安全等都具有十分重大的意义。

In this paper, Shenyang Fumin Bridge main girder to carry out innovative design of the traveling carriage, Based on the similar design of traveling carriage , adopted under the former anchor beam arc settings to resolve the fate of the plane rotation problem , makes the main truss rod assembly by universal application of the cradle of the space cable plane cable-stayed bridge girder construction.

摘 要：本文对沈阳市富民桥主梁的施工挂篮进行创新设计，参考同类挂篮的成功设计思路的基础上，通过将前锚梁下缘设置弧形来解决索的平面转动问题，使得主桁由万能杆件拼装的挂篮应用于空间索面的斜拉桥主梁施工中。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。