力学的

In this dissertation, the mechanical behavior of the metal adhesively bonded composite joints under loading have been systematically investigated by numerical calculation methods and experiments, and effects of shape dimensions and physical parameters of joints on stress distribution and strength of adhesively bonded joints have been placed emphasis upon.

本文在对国内外关于金属-胶层复合材料接头力学性能数值研究及发展现状进行综述的基础上，运用有限元法并结合实验手段主要研究了胶接接头承载后的力学行为，综合考虑了几何尺寸和物性参数对接头强度和应力分布的影响，并运用层次分析法对胶接质量进行综合评估，综合考虑接头形式，制造工艺，操作人员素质等因素的影响。

The stress distribution of adhesively-bonded metal/metal single lap joints under tensile shear loading is analysed using elastic-plastic finite element method .The influence of lap length on the strength of adhesively bonded metal joints which are bonded with phenolic resin and acrylic resin respectively is discussed in detail. It is shown that adhesive has great influence on the stress distribution of the lap region. With the increment of lap length, the stress concentration of adhesive layer decreases.

本文在对国内外关于金属-胶层复合材料接头力学性能数值研究及发展现状进行综述的基础上，运用有限元法并结合实验手段主要研究了胶接接头承载后的力学行为，综合考虑了几何尺寸和物性参数对接头强度和应力分布的影响，并运用层次分析法对胶接质量进行综合评估，综合考虑接头形式，制造工艺，操作人员素质等因素的影响。

Using polyurethane as matrix and carbon black as conductive medium, electric conductive master batch was prepared with the blend method, and the carbon black /polyurethane blend conductive fiber was prepared with melt spinning method.

研究表明：随着碳黑含量的增加，导电性增强，但纤维的力学性能、可纺性下降，当碳黑质量分数为16％时，其导电性和力学性能较好；分散剂的含量对纤维导电性也有一定的影响

We find that a region of negative specific heat describing the character of gravity also exists in canonical ensemble, which is remarkably distinguished from the result of traditional statistical mechanics that the specific heat must be positive in that ensemble, implying that the gravitating system may also be described by canonical one.

2在正则系综中，我们同样根据广义统计力学对引力Toy模型进行了研究，发现也会出现类似于微正则系综中的负比热现象，这明显区别于传统的统计力学中比热必须非负的结论，从而得出在Tsalllis统计下正则系综也可以描述引力系统的结论。

This course introduces basic knowledge of Analytical Mechanics and theory of movement stability, and focuses on dynamics knowledge related tightly with engineering technique such as orbit moment in central gravitation field, electromechanical coupling dynamics, rigid-body dynamics, gyroscopic dynamics, manipulator dynamics et al.

本课程较系统地叙述了分析力学和运动稳定性理论的基础知识，着重介绍与工程技术密切相关的动力学知识，如中心引力场中的轨道运动、机电耦合系统动力学、刚体动力学与陀螺力学、机械臂的动力学分析方法。

In order to study impact mechanical properties of the basalt fiber reinforced concrete, the BFRC specimens with 0、0.1% and 0.3% fibre volume content were prepared. The Φ100mm split hopkinson pressure bar apparatus was adopted tocarry out the impact compressive experiment. The dynamic stress-strain curves were obtained. The impact mechanics performance of BFRC were studied through analyzing the impact compressure strength and deformation.

摘 要：为了研究玄武岩纤维混凝土（basalt fiber reinforced concrete，简称BFRC）的冲击力学性能，制备了纤维体积掺量分别为0、0.1%和0.3%的BFRC试件，采用Φ100mm分离式霍普金森压杆（split hopkinson pressure bar，简称SHPB ）设备对BFRC试件进行了冲击压缩试验，得到了BFRC的动态应力应变曲线，从冲击压缩强度和变形两方面研究了不同应变率下BFRC的冲击力学性能。

The studyshows that Chetaev's model for mechanicalsystems with non-holonomic con-straints can be reduced to three essential factors:(1)a kind of direct sum ofjet bundles according to the constraints,(2)D′Alembert's principle,(3)pos-tulate of ideal constraints.The first among the three factors only has geomet-ric significance and the second is a fundamental physics principle independentof any constraints.

研究表明，非完整约束力学系统的Chetaev模型归结为三个要素：(1)射丛按约束的直和分解；(2)D′Alembert原理；(3)理想约束条件，其中(1)仅具有几何意义，(2)为与约束无关的基本物理原理，而(3)是对约束力学系统的限制条件。

Firstly,according to the mechanical properties of soft clays and the traffic load induced dynamic deviator stress ,the static failure deviator stress was determined.

首先通过确定车辆荷载引起的动偏应力和土层的力学指标计算出静力破坏偏应力，然后通过考虑土物理力学性质、循环荷载次数的累积变形公式计算软土地基中各土层在车辆荷载作用下引起的残余累积应变，最后用分层总和法计算总沉降。

In spite of the granular nature, soil has traditionally been modeled as a continuum. This continuum mechanics cannot get the precise solution while soil\'s nonlinear, discontinuous, large deformation, and strain localization behavior are considered. The discrete element method is based on discontinuum theory, and is pioneered by Cundall.

土是由多相介质组成的离散颗粒集合体，尽管研究者早已在土的散粒状属性上达成共识，但关于土体力学性质的研究还经常沿用连续介质力学方法，这种基于连续体小变形假设的方法在求解实际土体非线性、非连续、大变形、应变局部化问题时往往无法得到精确解答。

The mechanical analysis showed that the effect of the DMSO was better than glycerol and glycerol/water.

动态力学和拉伸力学性能测试结果表明，经过DMSO的增塑，有效降低了淀粉的玻璃化转变温度，改善了材料的韧性，增塑效率要好于甘油及甘油／水复合增塑体系。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。