It is thus concluded that SAWI can effectively delay the cracking of asphalt pavement due to its low modulus, high toughness and elasticity, as well as good seepage-preventing capability.
各项性能试验表明，SAWI具有低模量、高韧性、高粘性、防渗等优点，可以有效地延缓沥青路面的开裂。
Experimental results reveal that the addition of ZrO〓 to O'-Sialon leads to improvement in modulus of rupture, elastic modulus, but decrease in high temperature strength. When ZrO〓 addition does not exceed 30wt%, there is an increase in fracture toughness.
研究结果表明：在O'-Sialon中引入ZrO〓，可以提高O'-Sialon-ZrO〓材料的室温抗折强度及弹性模量，但不利于材料高温抗折强度的提高，ZrO〓的引入不超过30wt％时，可以提高材料的断裂韧性。
Good toughness and damping properties were expected by decreasing the cross linkage density of RPUF, on the other hand, the increase of elastic modulus and reducing of influence of filler in toughness were hoped through superfine particulars dispersed well.
本文的基本思路是一方面通过降低RPUF的交联密度以达到良好的韧性和阻尼性能，另一方面通过良好分散的超细颗粒体增强RPUF的弹性模量，并降低对RPUF韧性的影响。
The results were as follows the airdried density (moisture content of wood is 12%), the basic density and the ovendry density were 0.583 g·cm-3, 0.462 g·cm-3 and 0.507 g·cm-3 respectively, the airdried density was at the medium level in domestic wood species; the shrinkage coefficient of radial, tangential and volumetric were 0.099%, 0.183% and 0.296% respectively, the maximum swelling were 4.106%, 7.958% and 12.627% respectively; the ratio of tangential shrinkages to radial shrinkages was 1.5-1.9; the toughness was 52.12 kJ·m-2; the hardness of cross, radial and tangential section were 41.53 MPa, 31.41 MPa and 35.51 MPa respectively; the compressive strength parallel to grain was 44.50 MPa; the modulus of elasticity in static bending and the bending strength were 12.63GPa and 127.31 MPa respectively; the shearing strength parallel to grain of radial and tangential were 8.76 MPa and 10.54 MPa respectively; the cleavage strength to grain of radial and tangential were 124.3 N·mm-1 and 138.6 N·mm-1 respectively.
结果表明大叶栎木材的气干密度（含水率为12％）、基本密度和全干密度分别为0.583 g·cm-3、0.462 g·cm-3和0.507 g·cm-3，气干密度属于国产木材的中等级水平；径向、弦向和体积干缩系数分别为0.099%、0.183%、0.296%，湿胀率依次为4.106%、7.958%和12.627%，差异干缩为1.5-1.9，其尺寸稳定性较好；冲击韧性为52.12 kJ·m-2，端面、径面和弦面硬度分别为41.53 MPa、31.41 MPa和35.51 MPa，顺纹抗压强度为44.50 MPa，抗弯弹性模量和抗弯强度分别为12.63 GPa和127.31 MPa，径面和弦面顺纹抗剪强度分别为8.76 MPa和10.54 MPa，抗劈强度依次为124.3 N·mm-1和138.6 N·mm-1。
In the present work, aqueous gelcasting-hot pressing technique to prepare SiC matrix laminated composites with superior properties was firstly realized. The composites with about 130μm matrix layers and 8μm interfacial layers were prepared. The strength, apparent fracture toughness, work of fracture, work of fracture, elastic modulus of the composites at room temperature reached to 729.86MPa, 20.58MPa. m〓, 3185.75J/m〓, 2744.84J/m〓, 290.10GPa, respectively. The strength at 1250℃ was 442.2MPa. The interfacial shear strength the composites at room temperature was 60.13MPa. The residual strength of the composites after 50 thermal cycling between 1250-1300℃ and about 300℃ was 89.3％ of as-received ones, and residual strength of the composites after heat treatment for 20 hour in gasfired condition in wind tunnel was 92.5％ of as received ones. These met the properties of combustor liner materials in airplane engine.
中文题名碳化硅基层状复合材料结构设计、制备与强韧性研究副题名外文题名 Investigation on structure design，preparation and toughening mechanism of silicon carbide matrix layered composites 论文作者袁广江导师陈大明教授学科专业材料学研究领域研究方向陶瓷基复合材料学位级别博士学位授予单位北京航空材料研究院学位授予日期2002 论文页码总数133页关键词碳化硅陶瓷材料陶瓷复合材料馆藏号BSLW /2003 /TB332 /11 本文从设计碳化硅基层状复合材料宏观结构出发，对层状复合材料的基体层和界面层材料性能以及它们之间的匹配关系进行了系统研究，并进一步探讨了显微组织、宏观组织与材料性能之间的关系。
The mechanical properties at room temperature and strengthening and toughening mechanisms of La2O3-TiC/W were investigated. The results show that co-addition of La2O3 and TiC improves hardness, elastic modulus, flexural strength and fracture toughness compared with pure tungsten.
结果表明：与纯钨相比，La2O3和TiC显著提高材料的硬度、弹性模量、抗弯强度和断裂韧性；La2O3-TiC/W复合材料抗弯强度在TiC的质量分数为5%时出现最大值898MPa，断裂韧性在TiC的质量分数为10%时出现最大值10.07MPa.m1/2。
Sol-gel technique preformed the best solution of almost perfectly dispersersed single nanoparticles in epoxy matrix, which enhances the toughness and Young`s modulus of nanocomposites simultaneously. Moverover, special attention was paid to the interface property between carbon fiber and nanocomposites by means of single fiber fracture test and laser Raman spectrum. The results showed that nanoparticles did contribute to the interface interaction between carbon fiber and nanocomposites. The fiber-matrix adhesion could be improved significantly by well dispersed nanoparticles in both DGEBA and AG-80 epoxy resins.
研究结果表明，与纳米橡胶增韧的环氧复合材料相比，不论是通用型环氧树脂还是高性能环氧树脂，均匀分散的无机刚性纳米粒子都能够显著提高碳纤维/环氧树脂的表面粘接强度；均匀分散的无机刚性纳米粒子能够有效防止碳纤维/环氧复合材料在应力作用下过早脱粘失效，从而降低了纤维复合材料对内部缺陷的敏感性。
METHODS: The aluminaglasscomposite was prepared respectively at 1400℃ and 1450℃ by fast or slow temperature elevation speed. The properties were measured, including density, thermal expansion coefficient, threepoint bending strength, fracture toughness, modulus of elasticity and Vickers hardness of AGC.
采用高速率升温至1400℃、1450℃，低速率升温至1400℃、1450℃ 4种方法烧结制备氧化铝玻璃复合体，对比测定AGC的密度、热膨胀系数、三点弯曲强度、断裂韧性、弹性模量和维氏硬度。
The existence of decay and hollow in tree trunks made density, bending modulus of elasticity, bending strength and toughness of wood decreased by 11.4%, 9.5% and 14.3%, 22.9%, respectively, which led to serious harm to the strength of trunk, Therefore, strength loss should be the key index in assessing the hazard of trees.
腐朽和空洞的存在使树干密度、抗弯弹性模量、抗弯强度和冲击韧性分别降低了11.4%，9.5%，14.3%，22.9%，树干强度损失严重，在评价中应把强度损失作为危险性评价的关键指标。
Research on stochastic elastic modulus of initial damage detection; 2. Meso mechanical analysis of effect of initial damage on ductile fracture initiation toughness of steel; 3. Effect of initial damage on ductile fracture initiation toughness of different microstructures of steels
在几组混凝土试件中，采用掺入不同量的引气剂的试验方法，人为地制造随机的细微空隙，以模拟不同程度的损伤，通过测定几组不同损伤程度混凝土试件的弹性模量和绘制试件受力变形曲线，计算了单轴拉伸情形下的初始损伤和峰值应力所对应的损伤。
Main characteristics of cemented carbide are as following:(1） High hardness and strength; （2)High modulus of elasticity; (3) Stable them; tai property:(4) Law Impact toughness and thermal
硬质合金的主要特点有：（1）高的硬度和耐磨性；（2）高的弹性模量；（3）较稳定的化学性质；（4）较低的冲击韧性和热膨胀系数。
Various mechanic performances of asphalt pavements directly depend on modulus of asphalt (or viscosity), yield strength and toughness.
沥青的弹性模量（粘度）、屈服强度及韧性直接决定了沥青路面的各种力学与使用性能。
To analyze the characteristics of TBCs such as residual stress, bond strength, fracture toughness, and crack propagation ratio, the Young's modulus and Poisson's ratio are important parameters.
为确定热障涂层的残余应力、结合力、断裂韧性、疲劳裂纹扩展速率等性能和特性，需要知道其杨氏模量和泊松比。
According to the profiles of the indentation, radial crack size and related equations, the microhardness Hv, Young's modulus E, cracking threshold, and fracture toughness hade been evaluated.
根据维氏压痕的断面轮廓、径向裂纹尺寸和相关的计算表达式，测试了显微硬度Hv和裂纹萌生的临界载荷值，评估了该准晶材料的杨氏弹性模量E和断裂韧性。
Load deflection curves are plotted from the data obtained in the modulus of rupture test in order to determine the toughness indexes by the ASTM method, and the flexural toughness factor and equivalent flexural strength by the Japanese Standard method using four point bending beam.
基于美国ASTM及日本JCI方法，用四点弯曲梁测得了抗弯初裂强度、抗弯拉强度和抗弯韧性等。
The dimensionless net pressure, difference of Yang's modulus and fracture toughness between reservoir and salutatory barrier also affected the behaviors of hydraulic fracture.
产层与突变体之间的弹性模量差异、断裂韧性差异以及缝内净压力无因次量是影响裂缝走向的重要因素。
Results show that proper intensive microwave irradiation has little influence on the mechanical properties of larch wood, which results in no more than 10 percent decrease in modulus of elasticity and impact toughness of larch wood compared with the untreated wood.
结果表明，适当的高强度微波辐照对落叶松木材的力学性能影响不大，弯曲弹性模量和冲击韧性下降不足10%；
Many characteristic points and the characteristic parameter can be determined from the stress-strain entire curve of concrete, including peak strength and peak strain, first crack strength and first crack strain, elasticity modulus, toughness index, fracture energy.
通过混凝土拉伸应力&应变全曲线，可以确定混凝土的多个特征点及特征参数，包括峰值强度和变形、初裂强度和变形、弹性模量、韧性指数、断裂能。
Two kinds of fiber, which are AR-glass fiber with high elasticity modulus and polypropylene fiber with low elasticity modulus, have been added into the concrete in order to reduce the plastic shrinkage cracks of the early age as well as enhance the toughness of the concrete.
为减少混凝土早期塑性收缩裂缝及提高混凝土韧性，采用了在混凝土中混合掺加两种纤维的方法，即高模量的耐碱玻璃纤维和低模量的聚丙烯纤维。
The addition of Mo is found improving the elastic modulus, hardness and fracture toughness of the composites.
Mo的加入改善了复合材料的杨氏模量、硬度和断裂韧性。