This was due to three reasons : ( 1 ) baso4 particles were rigid inorganic particles , which could hinder the retraction of polymer molecules and decreased the elasticity . ( 2 ) a bad compatibility between baso4 and tpu , small interface adhesive force and the phase interface ready to separate . ( 3 ) during high content of baso4 , the tenacity of filament mainly depended on tpu , so that the strength decreased with the content of tpu in filament down 这是因为： baso _ 4属于刚性粒子，阻碍tpu大分子链的回缩，降低了纤维的弹性； baso _ 4与tpu相容性极差，共混时容易形成相界面，界面结合力小，受外力作用时相与相间容易发生分离，使纤维的力学性能下降； baso _ 4在高含量下，纤维强度主要由聚合物的力学性能决定，随着baso4含量的增加， tpu所占比例下降，从而在宏观上表现出纤维的力学性能下降。
The pressureless infiltration technique means that the spontaneous infiltration of the refined molten al or al - si alloy into the power bed , contains the filler reinforcement particle and k2tip4 , occurred at 900 to fabricate sicp / al or sicp / al - si composites , without the aid of any externally applied pressure or vacuum , only by its gravity 无压自浸渗法是指在不借助任何外力作用下，把熔炼好的铝液，经精炼，调温后，浇入经过预热，含有增强体颗粒与助渗剂的混合体粉末中。
The mechanical parameters were evaluated by cure fitting of the experimental data . from this model , the deformation , stress of the grape skin and the change of the inner - pressure was obtained . it was found that the change of the volume for unit of force is a constant 并利用该模型对葡萄受到压缩外力作用时，外力、变形、内压改变量和葡萄皮应力之间的关系进行了计算和分析，得到了体积改变量的变化值是一个常数，使得各力学量与葡萄总体变形量的关系是非线性关系的结论。
( 6 ) conclusion was obtained by the analyzing the mechanics environment and the stability of the lanslide on the right bank after the dam built : the value of the rock mass stress increased and the tensile stress region obviously reduced , the direction of the principal stress was unchangeable the dam and the landslide were stable under the dangerous condition ( the reservoir and at the same time the earthquake was viii ) , but when the water lever suddenly fell and did not think of other force , safe factor evidently reduced , the dam and the landslide will be destroyed under the most dangerous condition ( the water lever suddenly fell and at the same time the earthquake was vi ) ; the stability of the landslide will be destroyed by the horizontal thrust under the most dangerous condition or ; the physical and mechanical parameter will be reduced due to long period filter , the landslide will be destroyed too ( 6 )建坝工程荷载条件下河谷岩体力学环境分析及右岸古滑坡体的稳定问题分析得出：建坝后河谷的岩体应力量值明显增高，同时左岸的张应力区的范围及量值明显减小，主应力的方向依然与模型的底边界垂直；大坝建成后逐渐蓄水阶段以及同时考虑本区最强地震力的作用等各种不同的工况条件时，滑坡体及坝体总体上仍处于稳定状态；水位骤降时，在未考虑其他外力作用的情况时，滑体的安全系数将显著降低。若考虑水位骤降及本区最大地震力的共同作用，坝体将在滑坡体下滑推力的作用下产生破坏；建坝后水平推力对右岸古滑坡体稳定性的影响分析可以看出，在最危险的工况条件下，坝体及滑坡体也将处于临界状态；在长期渗透变形的作用下，由于滑带的物理力学参数的降低而有可能导致坝体失稳破坏。
Afm - based single molecule force spectroscopy and optical tweezers can be used to study the molecule - level mechanical problems of polymer materials , which include the strength and elastic properties of single polymer chain , force - induced conformation transition of polymer chain , interaction among polymer molecules , adsorption strength and conformation of polymer chain on solid substrates , nanometer - scale viscoelasticity measurement and nano - tribology of polymer surfaces 摘要基于原子力显微技术的单分子力谱法和光钳法可用于研究聚合物材料分子层次上存在的力学问题，包括聚合物分子链的强度、弹性性质及外力作用下的构象转变、分子间相互作用、聚合物分子的界面吸附以及聚合物表面的纳米粘弹性和纳米摩擦学等问题。
Then at the elastic - plastic state taking advantage of the brace and eccentric distant , we can control the inelastic deformation of the braced frame . the reinforced concrete frames with eccentric brace conform with the earthquake - resistant principle and its seismic properties have improved remarkably . during the lowly circular and repeated loading , the load - bearing , deformation , and ductility of the eccentrically braced reinforced concerete frames were measured 偏心支撑钢筋砼框架的设计意图是当结构在抵抗外力作用时，在弹性阶段结构有较高的抗侧刚度，而当结构进入弹塑性阶段时，利用支撑和耗能段梁的变形使结构的非弹性变形可控，体现了抗震结构“先刚后柔”的原则，使钢筋砼框架的抗震性能得到有效地改善。
