As the fleet ages, there's an increasing need for embedded wireless strain sensors capable of detecting and tracking accumulated strains — "precursors" to crack initiation, according to the official.
随着机群服役时间的增加，对嵌入式无线应力传感器的需求也在不断的增加，通过这些传感器对应力积累进行探测和跟踪，避免飞机机体发生可能的疲劳和破裂。
Only if this short crack extends long enough and blunted wide enough, can it affect the principal crack extension and the distribution of stress and plastic strain.
只有小裂纹扩展到足够长并钝化到足够宽，才能够影响主裂纹的扩展及其前端应力、应变的分布。
The notch sensitivity of HSC and steel fiber reinforced HSC and the strain field of HSC reinforced with steel fibers ahead of the crack tip have been analyzed.
分析了钢纤维高强混凝土和普通高强混凝土的缺口敏感性以及钢纤维对高强混凝土裂缝前缘应变场分布的影响。
Local strain concentration in angle-ply lay caused by transverse crack of circular lay in composite pressure vessel was studied by means of advanced shear-lag method.
利用改进的剪切滞后法，研究了组成纤维缠绕压力容器中的环向层的横向开裂而在纵向层中引起的局部应变集中。
The strain fatigue properties, the fractograph near fatigue crack sources and the fatigue dislocation structures of LY12CZ aluminium alloy are investigated in some detail.
较详细地研究了LY12CZ铝合金的应变疲劳性能、疲劳裂纹生成区断口特征及疲劳位错组态。
So the strain modal broken line drawing method is presented for determning the location of the crack on a structure.
从而提出了应用应变模态折线图来估计梁结构上裂纹位置的方法。
The authors suggest that this effect is due to the change in the strain rate of crack tip metal thus altering the thermodynamics of crack onset and growth.
作者认为载荷频率的上述影响是因裂纹尖端的应变速率随载荷频率而变化，从而改变了裂纹起始与扩展的热力学条件。
Form displacement, strain, length of crack and so on, we can see timber frame meeting the challenge of anti-seismic, the results show that the frame has good anti-seismic performance.
从试验中得到的位移、应变、裂缝开展等数据，可以看出木构架房屋满足抗震设防要求，具有很好的抗震性能。
The prototype observation items of the Puding RCC arch dam include stress and strain observation, temperature monitoring, observation of joints, crack and seepage pressure.
大坝的原型观测项目有应力应变观测、温度观测、渗流观测、接缝观测和裂缝观测。
The fatigue crack closure and fatigue crack growth rate in the high strain region of SCT specimen are studied.
本文研究了SCT试样高应变区的疲劳裂纹闭合效应和疲劳裂纹扩展速率。
High strain rate will occur at the tip of a growing crack, whether quasi-static or dynamic growth, due to the existence of strain singularity.
在扩展裂纹尖端，无论是准静态扩展还是动态扩展，由于应变奇异性的存在，出现较高的应变速率。
The test result show that BGB plastic cushion material can restrict the tensile stress and strain and prevent the facing from crack under a relatively small sliding displacement.
研究结果表明，BG B塑性垫层材料可在较小的滑动位移下对面板拉应力和拉应变进行调整，确保面板在滑移过程中不开裂。
The two dimensional accurate solution is obtained on plane strain assumption, the numerical results of strain energy release rate and crack tip energy release rate are presented.
在平面应变假设下，给出其二维精确解，并提供了机械应变能释放率和裂尖能量释放率等数值结果。
It is also showed that the critical strain values of crack nucleation decrease with the increase of the size of inclusions.
结果还表明，随着夹杂物尺寸的增加，裂纹临界形核应变降低。
A path independent of the J-integral and the stress, strain on the crack tip are discussed.
讨论了J积分的路径无关性和裂尖应力，应变奇异性。
The tensile displacement and angle of rotation of tensile strain localized band are analyzed in strain softening stage and in real crack propagation stage based on gradient-dependent plasticity.
基于梯度塑性理论，分析了应变软化及真实裂纹扩展阶段的局部化带的张拉位移和转角。
So such, both shape consistent with boundary element geometrical shape, and simulate crack tip close-by variety law of stress and strain with higher precision, and enhancing calculative efficiency.
如此，既能与边界单元几何形状基本拟合，又能高精度地模拟裂纹尖端附近位移和应力变化规律，并提高计算效率。
Strain energy change is used as damage index and a nondestructive crack detection method is proposed.
把结构遭受裂缝损伤的应变能变化量作为损伤指标，提出一种新的无损裂缝识别方法。
The load-strain relationship at crack tip is obtained through electric strain gauge measurement.
用电测法得到了裂尖处的载荷—应变标定关系。
Strain gauges are applied to measure the stress intensity around the crack tips. Strain and pressure are measured by electrical resistance strain gauges.
采用应变片来量测裂纹尖端的应力集中现象，利用电阻应变仪来读取应变与压力值。
Not only the strength at first crack and ultimate strength can be calculated, but the stress-strain curve of composite material can be established.
该理论不仅可以给出复合材料的初裂强度和极限强度，而且还能给出复合材料的应力-应变曲线。
The crack tip stress-strain field of elastic-plastic materials are analysed by finite element method in the plane stress condition.
用有限元方法对平面应力条件下弹塑性材料的裂纹尖端应力应变场进行了计算。
The exact solution of linear elastic fracture mechanics is suggested in this paper and the plastic zone of crack tip is calculated under the condition of strain-hardening of material.
本文从线弹性断裂力学的精确解出发，在考虑材料强化影响的情况下，计算出裂纹前缘的塑性区。
The crack closure is dynamically measured by means of interferometric strain-displacement gauge(ISDG).
用激光干涉应变-位移测量仪（ISDG）进行了裂纹闭合点的高精度动态测量。
The strain energy release rate of the crack propagation was calculated by using virtual crack closure technique, and fatigue life was forecasted.
采用虚拟裂纹闭合技术计算裂纹扩展的应变能释放率，并对裂纹扩展寿命进行计算。
An elastic viscoplastic model is used to analyse stress and strain fields at the tip of a propagating crack under antiplane shear.
弹性-粘塑性模型对反平面剪切扩展裂纹尖端的应力应变场进行了分析。
The formula of strain and crack width of temperature and contraction with no varying place constraint con detion are deduced, capale be design basis for crack control of R. C structure.
阐述了砼结构体表比和约束比对温度和收缩应变和裂缝的影响程度，推导出R．C结构在四周无变位边界约束条件下的温度和收缩应变、应力及裂缝宽度计算公式和运用实例。
Based on the conventional triaxial compression test of Three Gorges granites, the crack initiation stress under different confining pressures can be obtained by studying the crack strain curves.
从三峡花岗岩常规三轴实验出发，通过研究裂纹应变的变化规律，得到不同围压下花岗岩的起裂应力。
The result shows that the plastic strain at the heel region induced by wire bonding process, molding process and the thermal stress and strain in solder reflow are the main causes of heel crack.
结果显示由于引线键合工艺、注塑工艺以及回流焊中封装体各部分不同的热膨胀系数引起的热应力和塑性变形是产生引脚跟断裂的主要因素。
The result shows that the plastic strain at the heel region induced by wire bonding process, molding process and the thermal stress and strain in solder reflow are the main causes of heel crack.
结果显示由于引线键合工艺、注塑工艺以及回流焊中封装体各部分不同的热膨胀系数引起的热应力和塑性变形是产生引脚跟断裂的主要因素。
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