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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
Advanced cement based nanocomposites reinforced with MWCNTs and CNFs
GDOUTOS,Maria S. KONSTA-GDOUTOS,Panagiotis A. DANOGLIDIS,Surendra P. SHAH
《结构与土木工程前沿(英文)》 2016年 第10卷 第2期 页码 142-149 doi: 10.1007/s11709-016-0342-1
关键词: multi-walled carbon nanotubes carbon nanofibers mortars toughness Young’s modulus
Lei Zhang, Lisha Zhao, Ping-Kai Ouyang, Pu Chen
《化学科学与工程前沿(英文)》 2019年 第13卷 第1期 页码 98-107 doi: 10.1007/s11705-018-1775-y
Cholesterol plays a significant role in the organization of lipids and modulation of membrane dynamics in mammalian cells. However, the effect of cholesterol depletion on the eukaryotic cell membranes seems controversial. In this study, the effects of cholesterol on the topography and mechanical behaviors of CHO-K1 cells with manipulated membrane cholesterol contents were investigated by atomic force microscopy (AFM) technique. Here, we found that the depletion of cholesterol in cell membranes could increase the membrane stiffness, reduce the cell height as well as promote cell retraction and detachment from the surface, whereas the cholesterol restoration could reverse the effect of cholesterol depletion on the membrane stiffness. Increased methyl-β-cyclodextrin levels and incubation time could significantly increase Young’s modulus and degree of stiffing on cell membrane and cytoskeleton. This research demonstratede importance of cholesterol in regulating the dynamics of cytoskeleton-mediated processes. AFM technique offers excellent advantages in the dynamic monitoring of the change in membranes mechanical properties and behaviors during the imaging process. This promising technology can be utilized in studying the membrane properties and elucidating the underlying mechanism of distinct cells in the near-native environment.
关键词: cholesterol methyl-β-cyclodextrin atomic force microscopy Young’s modulus CHO-K1 cell
通过 B 位Ta置换对 AB O4型EuNbO4的热学和力学性质进行优化 Article
陈琳, 冯晶
《工程(英文)》 2020年 第6卷 第2期 页码 177-184 doi: 10.1016/j.eng.2019.12.006
铁弹性的ABO4型RETaO4陶瓷和RENbO4陶瓷(RE表示稀土)是具有潜在应用价值的热障涂层(TBC)材料,研究人员正在对其进行大量研究。结果显示, RETaO4陶瓷的力学性质优于RENbO4陶瓷的力学性质。在本研究中,我们通过B位钽(Ta)置换对利用固相法(SSR)制备的EuNbO4陶瓷的热学和力学性质进行优化。我们使用X射线衍射(XRD)法和拉曼光谱技术对所制备的晶体结构进行确认,并利用扫描电子显微镜(SEM)对结构表面的微观形貌进行观察。结果表明,通过B位Ta置换可以有效提高EuNbO4陶瓷的杨氏模量和热膨胀系数(TEC),且其最大值分别为169 GPa和1.12×10−5 K−1(1200 ℃); EuNbO4陶瓷的热导率被降低至1.52 W·K–1·m–1(700 ℃),且材料的抗热辐射能力得到了改善。我们建立了声子热扩散系数与温度之间的关系,用以通过消除热辐射效应来确定声子本征热导率。研究结果表明,通过B位Ta置换能够有效优化EuNbO4的热学和力学性质,从而使得此种材料在将来可成为一种高温结构陶瓷材料。
Plated contacts for solar cells with superior adhesion strength to screen printed solar cells
CHEN,S. WANG,A. WENHAM,Z. SHI,T. YOUNG,J. JI,M. EDWARDS,A. SUGIANTO,L. MAI,S. WENHAM,C. CHONG
《能源前沿(英文)》 2017年 第11卷 第1期 页码 72-77 doi: 10.1007/s11708-016-0428-4
关键词: light-induced plating metal adhesion strength copper plating metal contacts solar cell durability silicon solar cells
Strength reduction factors for structural rubbercrete
Bashar S. MOHAMMED,N. J. AZMI
《结构与土木工程前沿(英文)》 2014年 第8卷 第3期 页码 270-281 doi: 10.1007/s11709-014-0265-7
关键词: crumb rubber recycled tire mix design reduction factor strength modulus elasticity
Empirical models and design codes in prediction of modulus of elasticity of concrete
Behnam VAKHSHOURI, Shami NEJADI
《结构与土木工程前沿(英文)》 2019年 第13卷 第1期 页码 38-48 doi: 10.1007/s11709-018-0479-1
关键词: modulus of elasticity normal strength normal weight concrete empirical models design codes compressive strength density
Preliminary experimental study of a supercritical CO
Junhyun CHO, Hyungki SHIN, Jongjae CHO, Young-Seok KANG, Ho-Sang RA, Chulwoo ROH, Beomjoon LEE, GilbongLEE, Byunghui KIM, Young-Jin BAIK
《能源前沿(英文)》 2017年 第11卷 第4期 页码 452-460 doi: 10.1007/s11708-017-0504-4
关键词: supercritical CO2 power cycle turbomachinery compressor turbine
金志高
《中国工程科学》 2004年 第6卷 第9期 页码 73-76
以Terzaghi土体固结理论和Biot固结理论为基础,按饱和度不同的分类,研究了高饱和土固结机理及过程,深入分析了高饱和土饱和度变化对孔隙流体压缩性的影响,以及由此影响到高饱和土的固结全过程。
Mohammed FARUQI, Gobishanker RAJASKANTHAN, Breanna BAILEY, Francisco AGUINIGA
《结构与土木工程前沿(英文)》 2022年 第16卷 第12期 页码 1653-1653 doi: 10.1007/s11709-019-0578-7
关键词: concrete fiber reinforced polymer E-modulus strength temperatures
Advances of 12th CAPS research symposium: young chemists and chemical engineers fronts
Guoping Hu, Baiqian Dai
《化学科学与工程前沿(英文)》 2021年 第15卷 第3期 页码 461-463 doi: 10.1007/s11705-020-2026-6
Growing collaborations between Chinese and UK young scholars on chemical science and technology
Weiping Wu, Xiaolei Fan, Yongliang Li, Ruijiao Dong
《化学科学与工程前沿(英文)》 2021年 第15卷 第1期 页码 1-3 doi: 10.1007/s11705-020-2027-5
Sorption enhanced catalytic CF
Jae-Yun Han, Chang-Hyun Kim, Boreum Lee, Sung-Chan Nam, Ho-Young Jung, Hankwon Lim, Kwan-Young Lee, Shin-Kun
《化学科学与工程前沿(英文)》 2017年 第11卷 第4期 页码 537-544 doi: 10.1007/s11705-017-1651-1
关键词: PFCs catalytic hydrolysis calcium hydroxide sorption enhanced process simulation
Comments from young scholars: Can machines completely replace humans in manufacturing processes?
Shanlin YANG
《工程管理前沿(英文)》 2018年 第5卷 第4期 页码 541-547 doi: 10.15302/J-FEM-2018207
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
Advanced cement based nanocomposites reinforced with MWCNTs and CNFs
GDOUTOS,Maria S. KONSTA-GDOUTOS,Panagiotis A. DANOGLIDIS,Surendra P. SHAH
期刊论文
Insight into the role of cholesterol in modulation of morphology and mechanical properties of CHO-K1 cells: An in situ AFM study
Lei Zhang, Lisha Zhao, Ping-Kai Ouyang, Pu Chen
期刊论文
Plated contacts for solar cells with superior adhesion strength to screen printed solar cells
CHEN,S. WANG,A. WENHAM,Z. SHI,T. YOUNG,J. JI,M. EDWARDS,A. SUGIANTO,L. MAI,S. WENHAM,C. CHONG
期刊论文
Empirical models and design codes in prediction of modulus of elasticity of concrete
Behnam VAKHSHOURI, Shami NEJADI
期刊论文
Preliminary experimental study of a supercritical CO
Junhyun CHO, Hyungki SHIN, Jongjae CHO, Young-Seok KANG, Ho-Sang RA, Chulwoo ROH, Beomjoon LEE, GilbongLEE, Byunghui KIM, Young-Jin BAIK
期刊论文
An improved design method to predict the E-modulus and strength of FRP composites at different temperatures
Mohammed FARUQI, Gobishanker RAJASKANTHAN, Breanna BAILEY, Francisco AGUINIGA
期刊论文
Advances of 12th CAPS research symposium: young chemists and chemical engineers fronts
Guoping Hu, Baiqian Dai
期刊论文
Growing collaborations between Chinese and UK young scholars on chemical science and technology
Weiping Wu, Xiaolei Fan, Yongliang Li, Ruijiao Dong
期刊论文
Sorption enhanced catalytic CF
Jae-Yun Han, Chang-Hyun Kim, Boreum Lee, Sung-Chan Nam, Ho-Young Jung, Hankwon Lim, Kwan-Young Lee, Shin-Kun
期刊论文