This research use advanced optical fiber sensor to detect or measure the residual stress existin composite materials.
本文的残余应力实验研究是运用先进的光纤传感器来测定复合体中纤维残余应力。
When mixed into the same carbon fiber quantity is 1.0%, differ age material's AC impedance chart is discrepancy very much, along with to hydrate age's add, C-S-H gel isa great deal of form, the solution resistance at the concrete is gradually aggrandizement, the carbon fibre of here qua transmit electricity quality disperse would leading effect of conductance, along with the add of exterior load, the transmit electricity quality of concrete is almost nothing change, till breakage, resistance change rate tempestuousness add, and that the resistance change rate along with inside stress linearity add of corbon fibre concrete in elasticity phase, when near peak value load, resistance rate just gradually add, indicate the test sample would be about to breakage.
当碳纤维体积掺量同为1.0%时，不同龄期材料的交流阻抗谱相差很大，随着水化龄期的增长，C-S-H凝胶大量形成，水泥基材料中的溶液电阻逐渐增大，此时作为导电性分散相的碳纤维将起电导的主导作用。随着外部荷载的增加，基准水泥基材料的导电性几乎无变化，直到破坏时，电阻变化率剧烈增大，而碳纤维水泥基材料在弹性阶段其电阻变化率随内部应力线性增加，当接近峰值荷载时，电阻率才逐渐增大，预示试件即将破坏。
Because of large difference in coefficients of thermal expansion between graphite fiber and magnesium matrix, there was high residual stress in matrix near the interface.
由于石墨纤维和碳化硅颗粒与镁基体的热膨胀系数相差很大，在界面区域基体中存在较高的残余应力。
As polypropylene fiber has virtues of good mechanics properties and enduring chemic corrasion, which can be used improve resisted tensile stress and toughness.
聚丙烯纤维是一种弹性模量低于水泥基基体的有机合成纤维，由于聚丙烯纤维具有很好的力学性能，耐化学侵蚀的优点，它可望用于改善基体的抗拉性能与韧性性能。
In this modified model, the effect of the stress concentration on the end stress in the fiber end region is considered, the average matrix strain is used to substitute for the so-called far field strain in the previous shear lag model. The change of the deformation states from elasticity to plasticity is considered and the interfacial shear stress and fiber axial stress are derived.
修正的模型合理考虑了纤维根区域应力集中对根应力的影响；用基体平均应变代替了经典剪切滞后模型中的远场应变；考虑了基体变形状态从弹性到塑性的变化，给出了塑性区上的表面剪切应力和纤维轴向应力的表达式。
Contraposed to the disadvantage of anchor monitoring, a novel fiber optic Bragg pre-stress sensor is adopted in this paper, based on the analysis of the using pre-stress sensor s.
针对预应力锚索检测的问题，在分析预应力传感器研究现状的基础上，提出了采用光纤 Bragg光栅传感技术进行锚索监测的新方案，详细介绍了光纤 Bragg光栅锚索预应力监测系统的工作原理及主要构成、进行了工程现场与常规的电测技术的对比实验。
This unique formulation gives it the strength of fiber glass with the flexibility of polyester. Compared with other geofabrics, Fiberglass -Polyester paving mat has the following advantages: it is easy to install, non-shrink and non-stretch, good high temperature stability can be milled and reused in asphalt mixtures. At the same time, the layer composed by the paving mat and adhesive asphalt can prevent the infiltration of surface water into the pavement structure and disperse stress.
聚酯玻纤布是玻璃纤维和聚酯纤维的混合物，具有良好的抗拉强度、延伸率低、高温稳定性好、与沥青及沥青混合料的相容性好，施工方便，易回收，同时聚酯玻纤布与沥青复合夹层有良好的防水性能和分散应力集中，聚酯玻纤布具有玻璃纤维的强度及聚酯纤维的韧性。
From these data, the formula for dust-cleaning flow velocity through the fiber and the detachment stress were inferred.
为了深入认识气箱式脉冲袋式除尘器的清灰机理，按可压缩气体绝热状态和等温状态分别计算了脉冲质量流量和气箱中气体压力、密度的变化，进一步推导出穿过滤袋的清灰气流速度方程和清灰剥离力方程。
Maximum fiber stress and maximum strain are calculated for increments
因负荷的增加，需要计算最大纤维应力和最大
The fiber Bragg grating was stickled to the free arm of the double cantilever and its stress response was obtained when adding load to the free end of the double cantilever.
将光纤Bragg光栅贴于双悬梁的梁端面，在双悬梁的自由端部施加载荷，对光纤Bragg光栅的应力响应特性测试。
The bond stress distribution of carbon fiber reinforced polymer/plastics tendon in reactive powder concrete along bond length was studied. Based on experimental research, relations of CFRP tendon stress-strain, CFRP tendon load-slip and bond stress distribution along bond length could be presented. The equations of bond stress distribution function of position were gained due to the test results.
通过试验研究了碳纤维增强复合材料筋在活性粉末混凝土中粘结应力沿埋长的分布，得到了CFRP筋在RPC中的应力－应变关系、荷载－滑移关系以及粘结应力沿埋长的分布曲线，并建立了粘结应力的位置函数计算式。
According to a great deal of tests, each mechanics property and anti-cracking performance of polypropylene fiber cement stabilized macadam were investigated systemically. The main content includes:(1) The formulae of shrinkage stresses of semi-rigid base course were deduced. This thesis analyzed each influencing factor of the maximum value of shrinkage stress and the cracking rule of semi-rigid base course. At the same time, the corresponding prevention measures of the cracks were presented.
通过大量试验，对聚丙烯纤维水泥稳定碎石的各种力学性能和抗裂性能进行了系统的研究，主要内容包括：(1)推导了半刚性基层收缩应力的计算公式，对影响最大收缩应力的各种因素及半刚性基层收缩裂缝产生的规律进行了分析，提出了相应的路面裂缝防治措施。
We recognized that in the machining process of the specimen, slanting reinforce fiber will be cut off, then the structured integrity of the specimen will be destroyed, making structure incompact, caused composite that bear the weight of fiber turn to matrix and stress concentration on truncation part, making composite strength reduced.
分析发现裁剪加工会破坏试件增强纤维的完整性，造成结构松散，使得材料基体承载变大，同时截断处有应力集中现象，从而削减了材料的强度。
To provide optical fiber: Fiber Distributed Temperature Stress Test System, Fiber Distributed Temperature Measurement System, Fiber Bragg Grating Health Monitoring System, fiber optic geophone systems, fiber Bragg grating wavelength calibration instrument and so on, which sensor product line is extremely rich and has industry representation, including: fiber optic temperature hygrometer, fiber-optic gas alarm, fiber-optic magnetic field sensors, optical fiber vibration sensor, fiber-optic high temperature pressure sensors, fiber-optic WIM system, fiber optic strain gauge welding, fiber optic embedded strain gauge, optical soil pressure gauge, fiber reinforcement meter, fiber optic pressure ring, fiber-optic displacement meter, fiber cracks meter, fiber optic osmometer, fiber-optic temperature sensor high temperature, optical fiber cable meter and so on.
北京达卡科技有限公司光纤方面提供：光纤分布式应力温度测试系统、光纤分布式温度测试系统、光纤光栅健康监测系统、光纤地震检波系统、光纤光栅波长校验仪等，其中传感器产品线极为丰富和具有行业代表性，包括：光纤温湿度计、光纤瓦斯报警器、光纤磁场传感器、光纤振动传感器、光纤耐高温高压传感器、光纤动态称重系统、光纤焊接式应变计、光纤埋入式应变计、光纤土压力计、光纤钢筋计、光纤压力环、光纤位移计、光纤裂缝计、光纤渗压计、光纤耐高温温度传感器、光纤钢索计等。
According to the results of triaxial compression test, the relationship of cement soil mixed with or without glass fiber concerning stress and strain in different ages and confining pressures was analyzed. Meanwhile, some parameters of cement soil mixed with glass fiber, such as shearing strength parameter, modulus of deformation and relationship between compression strength and deformation modulus were obtained.
根据玻璃纤维-水泥土的三轴压缩试验结果，分析了其在不同围压与龄期下的应力-应变关系，并得到玻璃纤维-水泥土的剪切强度参数、变形模量E50及变形模量与抗压强度qu的关系。
Composites fiber orientation ply splice stress concentration
复合材料；纤维方向；铺层拼接；应力集中
Taking the short-fiber composite materials or short-rib ribbed plate as engineering background numerical calculating method and numercal results of stress intensity factor of both crack and inclusion and interface stress of the inclusion are introduced concretely, when inclusion and crack are located in different positions.
以短纤维复合材料或肋条有限长的加肋平板为背景，具体介绍了夹杂与裂纹取不同相对位置时，裂纹和夹杂端点应力强度因子及夹杂两侧界面应力的数值计算方法及获得的数值结果。
Fortifying fiber is the major component against stress whereas resin glues the fiber into an organic whole, which...
增强纤维为主要受力成分；树脂是将纤维粘成整体，它即能使纤维整体受力，又能保护纤维免受机械破损或化学腐蚀。
Fortifying fiber is the major component against stress whereas resin glues the fiber into an organic whole, which not only enables the fiber to sustain pressure together but also prevents the fiber from mechanic breakage or chemical corrosion.
增强纤维为主要受力成分；树脂是将纤维粘成整体，它即能使纤维整体受力，又能保护纤维免受机械破损或化学腐蚀。
The research based on experiments of six reinforced concrete beams strengthened against shear damage. During the research we developed special devices to stress U style stirrup of carbon fiber sheet, and compared deflection, cracks, ultimate load of RC beams in which some was strengthened by prestressed U style stirrup of carbon fiber sheet and the other was strengthened by non-prestressed U style stirrup. I generally analyzed the effectiveness of the prestressed strengthening method on the working performance of RC beams.
本文进行了6根钢筋混凝土受剪梁的试验研究，自行研制了对碳纤维布U形箍施加预应力的方法和装置，对比了预应力碳纤维布U形箍加固的钢筋混凝土受剪梁与非预应力碳纤维布U形箍加固的钢筋混凝土受剪梁的挠度、裂缝、极限荷载等工作性能，分析了碳纤维布施加预应力对这些工作性能的影响。