力学

The premary tests show that three of them can obviously improve the mechanical properties of soft PVC/L-CaCO3 materials;however, they almost heve no effect on PP/L-CaCO3 blends. This suggests that the coupling effect of the aluminates be not only re...

初步试验表明，有3种铝酸酯可明显提高软质PVC／L－CaCO_3共混物的力学性能，但4种铝酸酯对PP／L－CaCO_3共混物的力学性能均无改善，说明铝酸酯的偶联作用不但与它们的分子结构有关，而且和偶联的对象有关。

This article focuses on research of prediction of rock-burst happened in Cangling extreme long-tunnel engineering, comparison of tunnel carving details in the performing stage and prevention measures.

通过对苍岭特长隧道岩爆问题的预测研究和施工阶段洞身开挖情况对比，以及针对本工程的岩爆防治措施研究，探讨了岩爆预测判据对苍岭隧道工程的适用性，揭示了苍岭隧道围岩的岩性特征和初始应力场，掌握了苍岭隧道岩爆发生的烈度和基本分布规律，提出了对岩爆问题的工程防治措施，另外，根据工程区地质条件和岩石物理力学性能参数，建立了相应的地质力学模型，采用有限元法建模反演分析，其结果与通过钻孔水压致裂试验测得的地应力结果比较，显得较为吻合，并得到施工阶段通过洞壁应力恢复法分析结果的验证，验证表明理论模型和有限元模型的适用性及分析应力场是较为准确和合理的，并在此基础上对苍岭隧道岩爆进行分段预测和采取了较有成效的工程防治措施，具有较高的工程应用价值。

The problem of spherical cavitated bifurcation was examined for a class of incompressible generalized neo-Hookean materials, in which the materials may be viewed as the homogeneous incompressible isotropic neo-Hookean material with radial perturbations.

[1]上海大学数学系，上海市应用数学和力学研究所，上海200072 [2]上海大学数学系，上海市应用数学和力学研究所，上海200072／／烟台大学数学与信息科学系，山东烟台264005

In this dissertation, the mechanical mechanism of soil-roots composites is studied through numerical simulation and experimental study.

本文从复合材料细观力学的角度，对植物根系加固土壤的力学机理进行了数值计算和实验研究。

Thunderstorm downbursts, experimental device, horizontal wind velocity, vertical distribution horizontal distribution

欢迎访问《实验力学》编辑部网站！徐挺，陈勇*，彭志伟，楼文娟，孙炳楠。雷暴冲击风风洞设计及流场测试。实验力学，2009，(6)：505~512

In order to meet the new anchoring technology development required for the mechanical parameters of bolt body put forward a special request, I plant developed the advanced technology of equipment has been improved so that the bolt will not only meet the molding geometry, at the same time on mechanical parameters, the limit is to ensure the anti-rally, but also to enable an extension rate of bolt technical requirements.

为适应锚固技术发展的新需要，对锚杆体的力学参数提出了特殊的要求，我厂开发了先进的工艺对设备进行了改进，使成型的锚杆不仅满足几何尺寸，同时在力学参数上，既保证了极限抗拉力，又使锚杆的延伸率达到技术要求。

This study is based on physical printer's design. We could study dynamic effects ( including geometry and reaction) of pick roller/paper, pad/paper and plate/feed rollerconstrained by the conditions of five different feeding angle (65 、70 、75 、80 、85 ). Also we could obtain the relations of those design parameters and understand their interactions.

本研究以实际的印表机设计为蓝本，探讨在五种不同进纸角度(65 ，70 ，75 ，80 ，85 )的条件下，取纸滚轮对纸张的力学行为及几何关系、分纸垫与纸张几何关系、进纸档片及进纸滚轮对纸张的力学行为及几何关系，进而取得这些设计参数的关系式及了解其相互间的交互作用。

The microstructure and the mechanical properties of extruded pipes, as well as the blanks, were alsoanalyzed. The results demonstrate that there are a lot of fibred tissues in extruded pipes which will increaseits mechanical properties along axial direction. And the strength of thedeformed material is much higher than the former.

对挤压前坯料和成型管坯分别进行金相显微分析，扫描电镜分析以及力学性能分析，结果表明：通过等温热挤压得到的管坯在轴向有明显的纤维状组织，极大地改善了其轴向力学性能，挤压管坯的强度比通过锻态钻孔得到的管坯有显著提高。

The properties of the flash butt welding joint achieved the level of the foreign experiment results. It can meet the requests of the correlation technology condition.

高锰钢辙叉与钢轨闪光对焊接头的抗拉强度达钢轨母材的60%左右；冲击韧性值也在钢轨母材冲击值的60%以上，其接头力学性能接近或达到了国外加过渡层闪光对焊接头力学性能的水平。

Meanwhile, the microstructures and mechanical properties of friction welded drill pipes have been compared with those of hot-upsetting drill pipes.

试验结果表明，采用摩擦焊接及焊后调质热处理工艺制造的DZ60地质钻杆焊接接头的常规力学性能指标均高于地矿部DZ60地质钻杆管材的技术标准规定的数值，并优于采用现行热墩粗工艺制造的钻杆管材的力学性能数值。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。