| 1. | Numerical simulation of fracture propagation of rock under uniaxial tension
岩石单轴拉伸破坏过程的数值模拟 |
| 2. | Based on test results , numerical simulations on uniaxial tension at 480 and different strain rate have been conducted
在试验研究基础上，利用chaboche粘塑性模型模拟高温下( 480 ) 、不同应变速率的单轴拉伸。 |
| 3. | Recommendations for the presentation of plastics design data - mechanical properties - creep in uniaxial tension or compression with particular reference to solid plastics
塑料设计数据表示方法推荐标准.第1部分:机械性能.第1节:蠕变.第1小节:单轴拉伸或压缩蠕变 |
| 4. | The thickness is only 200um , and the width of the test part is 300u . m . it is first time nationally to use such a small specimen to measure mechanical properties of materials with uniaxial tension test
本文采用的拉伸试样，厚度只有200 m ，试验段宽度为300 m ，对如此微小的试样进行单轴拉伸试验以得到其应力应变曲线在国内还是首次。 |
| 5. | The contents of this study are as follows : 1 . the techniques of mechanical property test that have been used for mems are summarized . the method and process of the uniaxial tension test methods are described in details
论文主要包括以下几个方面的内容： 1 )综述了国内外mems材料力学性能的测试方法及进展，特别是对单轴拉伸作了详细的概括与分析，为本文的研究工作提供参考。 |
| 6. | 3 . base on the single axes stretching experiment data of pmma sample with holes , validating the experiment data , we can get the rule that influenced by the stress and time together of the pmma sample ' s crazing damage density
3 、基于有孔洞pmma试件的单轴拉伸实验结果，对所得数据进行综合武汉理工大学硕士学位论文分析，得到有孔洞pmma试件银纹损伤密度随应力和时间共同影响的演化规律。 |
| 7. | Based on the previous and through the uniaxial tension damage experiment and comparing to the uniaxial compression damage experiment , the paper makes research on the anisotropism of the damage and the difference of the damage between the uniaxial tension and the uniaxial compression , combining with orthogonal anistropic damage model and exponent function damage developing equation . through the formulae deduction , the damages caused by the same absolute value tension and compression strain have the comparing character in some extent and corresponding decay coefficient
本文在前人研究的基础上，通过单轴拉伸损伤试验，及其与单轴压缩损伤试验的比较，进一步结合正交异性损伤模型与指数函数损伤演变方程，对混凝土体中损伤的各向异性以及单轴拉伸和单轴压缩情况下损伤的差异性进行了研究探讨，经过公式推导，提出绝对值相等的拉、压应变产生的损伤具有一定的可比性，并给出了进行可比性换算的折减系数。 |
| 8. | This paper mainly study two kinds of smart materials which are both reinforced by chopped carbon fiber mat but use two different kinds of polyester resin as matrix and discuss the influence of content of carbon fiber on conductivity . focus on the relationship between strain and volume resistivity under tensile condition influenced by the factors such as resin matrix and fiber content
研究了其含量与导电性之间的关系；重点对不同基体树脂材料及不同碳纤维含量等因素对复合材料在单轴拉伸条件下，拉伸状态下应变与体积电阻率之间的变化关系进行了研究；确定了电阻率与应变之间变化的数学关系。 |
| 9. | The technique that used to measure the mechanical properties for mems is different from the traditional one considering the size scale . a uniaxial tension test system for test the mechanical property of mems materials is presented in this thesis . the strain is measured by interference strain / displacement gauge ( isdg )
本文介绍了新近研制的用于测量微电子机械系统mems材料的机械性能的单轴拉伸试验系统，采用激光干涉技术测量试样应变，得到材料从开始变形直至破坏的全历程应力应变曲线。 |
| 10. | Early age cracking of concrete has re - emerged as an important issue all over the world in recent years . the stress , due to restrained volume change related to thermal deformation and shrinkage in the early age concrete , is the main driving force for the deleterious cracking in the construction stage . during the development of the stress , creep , a very important property of concrete , is always developing . creep contributes to 40 ? - 50 ? reduction of the elastically induced stress in the restrained specimen . ring test , a qualitative test , can provide information to assess the potential for cracking of different concrete . an overview of ring test developed in recent years and mechanism of uniaxial tensile creep test is described in this paper at first . then , an innovative test equipment based on ring test is outlined
近年来混凝土早期裂缝问题再次引起全球工程界的广泛关注.早期混凝土由于体积变形受到约束而产生的应力是导致混凝土开裂的主要因素.在混凝土应力发展的同时,混凝土徐变也在同时发生着变化.有研究表明,徐变能减少40 ? - 50 ?的早期应力.圆环试验是用于定性评价混凝土材料抗裂性能的试验方法之一.本文首先分析了圆环试验和单轴拉伸徐变试验的原理,创造性地将圆环试验用于测量早期混凝土的干缩徐变,并设计了试验方案 |
