| 1. | Allowable flexural stress
容许弯曲应力 |
| 2. | The relationship between the flexural stress field and the vertical and horizontal loading is also discussed in details respectively . the result shows that the flexural stress of the western china is about several hundred mpa
结合中国大陆西部的地质特征，讨论了挠曲应力场在板块垂向上的变化规律，分析了垂向荷载和水平荷载对挠曲应力场的影响。 |
| 3. | Based on the lithosphere rheology , we use a 3d method in space domain to calculate the flexural stress field of the continental lithoshpere in western china . in this thesis , the vertical variation of the flexural stress field is presented
本文在前人研究的基础上，依据岩石圈流变学理论，在空间域采用垂直和水平受力的多个变刚度的三维有限差分方法来计算弹性板的挠曲，从而求得相应的挠曲应力场。 |
| 4. | The vertical loading plays a major role in the state of the flexural stress . beneath the mountain belts , the compression decreases and changes to extension from the top of the elastic plate to the bottom . the change of the flexural stress beneath the basin is vice versa
从弹性板顶部向下，造山带下方的挤压逐渐减小，到中性面以下变为拉张，然后张应力逐渐增大，在弹性板底部达到最大；盆地下方的变化则与之相反。 |
| 5. | Lastly , with the fatigue equation , the paper establishes the fatigue stress coefficient which is used in the load stress calculation for lean concrete as undersurface of cement concrete pavement , and the structure coefficient of flexural tensile strength which is used in the flexural stress check for lean concrete as base of asphalt pavement
利用得出的疲劳方程，建立贫混凝土作为水泥混凝土路面下面层荷载应力计算的疲劳应力系数，以及作为沥青路面基层时，进行层底弯拉应力验算的弯拉强度结构系数。 |
| 6. | The work done in this paper is mainly as follows : ( 1 ) the wide beam should intrude to the wall at some length to make the flexural stress uniform along beam section width , thus make full use of the beam ' s bearing capacity and avoid the shear failure in the concrete joint . and it also prevents stress focus and concrete crack in the local shear wall
关于宽梁与薄墙肢节点，可以得出以下几点初步结论：宽梁应该深入墙肢一定的深度，以使宽梁截面的弯曲应力沿着梁截面宽度分布均匀，充分发挥宽梁的抗弯能力，同时避免节点区混凝土的剪切失效，也避免剪力墙的局部因为受到的应力过大而拉裂。 |
| 7. | Second , many mechanical properties are tested , for example , tensile strength and tensile modulus , flexural strength and flextural modulus and impact strength . by the analysis of the tensile stress - strain curves and the flexural stress - strain curves , the results are as follows : 1 ) the voluminal content of fibre of composite making by vacuum assistant resin injection is more than other composites . 2 ) the mechanical properties of the needlepunching nonwoven fabric reinforced polymer composite are superior to these of the calendering nonwoven fabric reinforced polymer composite
首先，采用不同的增强材料(针刺非织造布和热轧非织造布) 、不同的基体材料( 961树脂和306树脂)和不同的成型工艺方法(手糊法、真空袋法和真空辅助成型法)制造出了一系列非织造布增强复合材料，然后对它们的拉伸强度、拉仲弹性模量、弯曲强度、弯曲弹性模量和冲击强度等力学性能进行了测试，并分析了它们的拉伸载荷? ?位移曲线和弯曲载荷? ?位移曲线，结果表明真空辅助成型工艺能大大提高纤维的体积含量；针刺非织造布增强复合材料各项力学性能优于热轧非织造布增强复合材料。 |
| 8. | Therefore the flexural stress covers a large percentage of the total stress field . the study of the flexural stress field of the continental lithoshpere in western china will contribute a lot to the understanding of the tectonic evolution of continental lithosphere and the global plate tectonics
研究中国西部大陆岩石圈的挠曲应力场对于了解该区总应力场的性质、研究板内造山运动和青藏高原隆升以及地球动力学都具有非常重要的意义，有助于理解构造运动的动力机制和大陆岩石圈的运动特征。 |
