检索范围:
排序: 展示方式:
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
《机械工程前沿(英文)》 2015年 第10卷 第3期 页码 294-300 doi: 10.1007/s11465-015-0351-0
The elastic modulus of a deposit (Ed) can be obtained by monitoring the temperature (?T) and curvature (?k) of a one-side coated long plate, namely, a one-dimensional (1D) deformation model. The aim of this research is to design an experimental setup that proves whether a 1D deformation model can be scaled for complex geometries. The setup includes a laser displacement sensor mounted on a robotic arm capable of scanning a specimen surface and measuring its deformation. The reproducibility of the results is verified by comparing the present results with Stony Brook University Laboratory’s results. The ?k-?T slope error is less than 8%, and the Ed estimation error is close to 2%. These values reveal the repeatability of the experiments. Several samples fabricated with aluminum as the substrate and 100MXC nanowire (Fe and Cr alloy) as the deposit are analyzed and compared with those in finite element (FE) simulations. The linear elastic behavior of 1D (flat long plate) and 2D (squared plate) specimens during heating/cooling cycles is demonstrated by the high linearity of all ?k-?T curves (over 97%). The Ed values are approximately equal for 1D and 2D analyses, with a median of 96 GPa and standard deviation of 2 GPa. The correspondence between the experimental and simulated results for the 1D and 2D specimens reveals that deformation and thermal stress in coated specimens can be predicted regardless of specimen geometry through FE modeling and by using the experimental value of Ed. An example of a turbine-blade-shaped substrate is presented to validate the approach.
关键词: in-plane Young’s modulus curvature temperature thermal stress coating
Moment-curvature relationship of FRP-concrete-steel double-skin tubular members
Mingxue LIU, Jiaru QIAN
《结构与土木工程前沿(英文)》 2009年 第3卷 第1期 页码 25-31 doi: 10.1007/s11709-009-0012-7
关键词: fiber reinforced polymer (FRP) concrete steel double-skin tubular members (DSTMs) moment-curvature curve flexural strength
Soft curvature sensors for measuring the rotational angles of mechanical fingers
Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN
《机械工程前沿(英文)》 2020年 第15卷 第4期 页码 610-621 doi: 10.1007/s11465-020-0596-0
关键词: soft sensor Ga-In-Sn alloy strain sensing curvature sensing mechanical finger bending
王裕清,梁剑
《中国工程科学》 2001年 第3卷 第12期 页码 68-70
曲面上点的主曲率计算是确定轮齿啮合压痕平面投影形状的关键。文章摈弃通常运用啮合原理和坐标变换计算的思路,从曲面本身的性质出发,把幺正活动标架和外微分引入主曲率计算,得到简明、有效的主曲率计算的新算法,并结合压痕公式给出了一个应用实例。该算法可以推广到任意曲面的主曲率计算。
柏冠军,赵汝敏,杨松岭,李培培
《中国工程科学》 2011年 第13卷 第5期 页码 23-27
通过地震曲率属性的分析,寻找适合研究区的地震曲率,研究其解释技术。系统总结了地震曲率技术的解释应用及应注意的问题。针对小断层在常规地震剖面上表现为同相轴的微小变化、扭曲、振幅突然变弱等特征,利用这些微小的变化在地震层曲率属性上表现为线性构造,进行小断层识别,异常的长度和方向分别代表着断层的延展长度和断层的走向。二维曲率属性有比较明确的物理意义,相对一阶导数属性(如微分、倾角、方位角等),它在构造特征识别上有明显的长处。它们对刻画地质体轮廓、分层结构、断裂系统等非常有效。实例表明,地震曲率属性对断层的轨迹、沉积体边界的刻画清晰、连续,利于解释,减少解释多解性。
CHEN Huisu, SUN Wei, ZHAO Qingxin, L. J. Sluys, P. Stroeven
《结构与土木工程前沿(英文)》 2007年 第1卷 第1期 页码 99-106 doi: 10.1007/s11709-007-0010-6
关键词: diameter initial microstructure influence surface spherical particle
Shao-fan WANG,Chun LI,De-hui KONG,Bao-cai YIN
《信息与电子工程前沿(英文)》 2016年 第17卷 第1期 页码 41-54 doi: 10.1631/FITEE.1500126
我们提出了使用曲率标度空间(CSS)描述符从单眼深度图像中进行手关节检测的框架。我们从输入的深度图像中提取手部轮廓,并使用轮廓的修改CSS映射的局部极值获得轮廓的指尖和手指谷。然后我们根据轮廓内部点深度的局部变化恢复未检测到的指尖。与使用角度检测器或凸包检测器的传统基于外观的方法相比,修改后的CSS描述符可以更精确地提取指尖和手指谷,因为它对嘈杂或损坏的数据更可靠;此外,深度的局部极值可以恢复指尖不能很好地弯曲手指,而传统的基于外观的方法在不匹配手模型的情况下几乎无法工作。实验结果表明,与三种基于外观的最先进方法相比,我们的方法能够更精确地捕获手部关节。
关键词: 曲率尺度空间;手部关节;凸包;手形轮廓
《结构与土木工程前沿(英文)》 页码 1281-1294 doi: 10.1007/s11709-023-0975-9
关键词: hydraulic structure curvature mode damage detection artifical neural network artificial bee colony
Emerging challenges to structural integrity technology for high-temperature applications
TU Shantung
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 375-387 doi: 10.1007/s11465-007-0066-y
关键词: manufacture aviation industry conversion petrochemical temperature
Effects of temperature on pyrolysis products of oil sludge
LIU Jianguo, SONG Wei, NIE Yongfeng
《环境科学与工程前沿(英文)》 2008年 第2卷 第1期 页码 8-14 doi: 10.1007/s11783-008-0030-z
关键词: sludge treatment corresponding Temperature liquid process
Phase separation time/temperature dependence of thermoplastics-modified thermosetting systems
ZHANG Xiujuan, XU Yuanze, YI Xiaosu
《化学科学与工程前沿(英文)》 2008年 第2卷 第3期 页码 276-285 doi: 10.1007/s11705-008-0057-5
关键词: separation time-temperature temperature dependency cure-induced separation activation temperature
Elevated temperature creep model of parallel wire strands
《结构与土木工程前沿(英文)》 页码 1060-1071 doi: 10.1007/s11709-023-0981-y
关键词: parallel wire strands experimental study elevated temperature creep model
Field test on temperature field and thermal stress for prestressed concrete box-girder bridge
Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG
《结构与土木工程前沿(英文)》 2009年 第3卷 第2期 页码 158-164 doi: 10.1007/s11709-009-0002-9
关键词: box-girder bridge field test hydration heat temperature field temperature gradient thermal stress
标题 作者 时间 类型 操作
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
期刊论文
Moment-curvature relationship of FRP-concrete-steel double-skin tubular members
Mingxue LIU, Jiaru QIAN
期刊论文
Soft curvature sensors for measuring the rotational angles of mechanical fingers
Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN
期刊论文
Effects of fiber curvature on the microstructure of the interfacial transition zone in fresh concrete
CHEN Huisu, SUN Wei, ZHAO Qingxin, L. J. Sluys, P. Stroeven
期刊论文
Damage assessment and diagnosis of hydraulic concrete structures using optimization-based machine learning technology
期刊论文
Emerging challenges to structural integrity technology for high-temperature applications
TU Shantung
期刊论文
Phase separation time/temperature dependence of thermoplastics-modified thermosetting systems
ZHANG Xiujuan, XU Yuanze, YI Xiaosu
期刊论文