| 1. | The new engineering concept known as damage tolerance has been developed to provide quantitative guidance for this purpose .
一个新的工程概念即损伤容限正发展起来，为这个目的提供了定量的指导。 |
| 2. | Further more , the tic pinned at the tips of the crack and impeded the crack propagation
此外，还有tic杂质颗粒对于裂纹的钉扎。材料具有一定的损伤容限。 |
| 3. | And the effect of integrity parameter correlative is analyzed . by studying the damage tolerance and durability of aeroplane wings and strengthened planes , the quantitative result of correlative analysis is given
同时也分析了完全性参数相关的影响，并通过对飞机机翼加劲板的损伤容限和耐久性的研究，给出相关分析的定量计算结果。 |
| 4. | Then an integrated application program including some functional modules such as residual strength analysis , crack growth analysis , principle structure elements database management , material properties database management etc , with friendly interfaces and favorable windows styles , is developed by using these classes . finally all of the typical structures described in the " damage tolerance design handbook " have been analyzed
在此基础上研制了具有友好界面和良好windows风格的损伤容限分析与评定应用程序，并完成了《设计手册》中给定的全部典型开裂结构的实例化，实现了对这些结构的裂纹扩展分析和剩余强度分析。 |
| 5. | The work of this thesis has shown that the object - oriented damage tolerance program does require much less time and is indeed more suitable than procedure - oriented programming in damage tolerance analysis of engineering structures . furthermore , the damage tolerance analysis classes have excellent ability in hierarchy and extension , so they are great valuable in engineering and will be used more widely in the future
本文工作表明，采用面向对象技术所建立的损伤容限分析类库具有良好的继承性和可扩充性，不仅可以使软件性能和适用性得到显著提高，而且还可以大大缩短软件开发周期，在工程上具有良好的应用价值和应用前景。 |
| 6. | As it is difficult to obtain the accurate analytical solutions for the stress constraints of general 3d cracks , we have conducted systemically detailed researches on the out - of - plane stress constraint by finite elements ( fe ) and proposed a two - parameter description of non - through thickness 3d crack fields . several problems in damage tolerant design were also investigated based on continuum mechanics and probability theory
三维应力约束对精确预测结构破坏不可缺少,因此,本文采用三维有限元等方法基于连续介质力学、概率论等理论,对典型三维裂纹尤其是非穿透裂纹系统深入地开展了三维应力约束理论计算、三维裂纹端部应力场描述以及结构三维损伤容限设计的研究。 |
| 7. | Considering the influence of material original flaw , the thesis gave the 4 # 125t crane of no . 3 steel - making plant of maansan steel co . for example to analyze the designing and remaining life of the crane ' s girder by using damnification limits design method . the method was based on the theory of rupture dynamics and the principle of disrepair - security
本文以马钢第三炼钢厂4 # 125t铸造起重机主梁下盖板大面积可见裂纹情况为例，考虑材料初始裂纹的影响，在断裂力学理论和破损?安全设计原则的基础上，采用损伤容限设计法来重新计算铸造起重机的设计寿命；并对正在服役的铸造起重机计算其剩余寿命，为铸造起重机的安全运行提供了较可靠的理论依据。 |
| 8. | Three dimensional braided composite is one kind of textile composite . structures with complex shape can be manufactured easily by three dimensional braiding technologies . three dimensional braided composite has higher impact resistance and higher damage tolerance than other textile composite have
三维编织复合材料是纺织复合材料的一种，三维编织技术可以制造任意复杂形状的构件并且三维编织复合材料具有更高的抗冲击性能和损伤容限，使三维编织复合材料的研究受到高度的关注。 |
| 9. | For the fine solution of this problem , the author has made an attempt to introduce the object - oriented technique to damage tolerance analysis . a set of basic and auxiliary classes , based upon some important concepts of object - oriented technique , which can be directly used for the development of programs of damage tolerance analysis has been designed and implemented by c + + language
为此，本文将面向对象的程序设计方法引入到损伤容限分析中，运用面向对象观点对损伤容限分析方法和数据需求作了全面分析，设计了一套损伤容限分析的基本类库和辅助类库，建立了损伤容限分析的对象模型，并采用c + +语言进行了实现。 |
| 10. | The fem model was accurate and effective by using submodel and error estimation technique that ensured the reliability of calculation and analysis . the thesis got the measure of critical flaw and designing life of the girder . in addition , the thesis calculated the remaining life of the girder while the flaw reaching 150mm
结合有限元分析结果和损伤容限设计方法，本文计算了马钢第三炼钢厂4 # 125t铸造起重机主梁下盖板的临界裂纹尺寸，及初始裂纹为0 . 5mm时主梁的设计寿命，并估算了在裂纹尺寸达到150mm时主梁的剩余寿命。 |
