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Effect of anisotropic characteristics on the mechanical behavior of asphalt concrete overlay
Lingyun YOU, Zhanping YOU, Kezhen YAN
《结构与土木工程前沿(英文)》 2019年 第13卷 第1期 页码 110-122 doi: 10.1007/s11709-018-0476-4
关键词: asphalt concrete overlay anisotropy temperature gradients modulus gradients finite element simulation sensitivity analysis
Ying Cui, Feng Tan, Yan Wang, Suyu Ren, Jingwen Chen
《环境科学与工程前沿(英文)》 2020年 第14卷 第6期 doi: 10.1007/s11783-020-1290-5
关键词: Diffusive gradients in thin films Molecularly imprinted polymers Selective uptake Antibiotics Passive sampling
陆利蓬,李兆瑞
《中国工程科学》 2002年 第4卷 第11期 页码 50-56
采用共振三波的一个周期作为湍流边界层近壁区相干结构的初值,用直接数值模拟方法对有压力梯度,包括定常压力梯度和变压力梯度作用下相干结构的演化进行了研究,得出其各种特性的变化与实验观测到的结果一致。压力梯度对相干结构初始扰动波的选择以及演化过程都起作用,相比之下对前者的作用更大。条纹结构和流向涡之间有某种内在的紧密的联系,可能是产生流向涡的起因。
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
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
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
《结构与土木工程前沿(英文)》 页码 812-826 doi: 10.1007/s11709-023-0940-7
关键词: falling weight deflectometer modulus of subgrade reaction elastic modulus metaheuristic algorithms
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 1654-1654 doi: 10.1007/s11709-020-0622-7
Simulation of viscoelastic behavior of defected rock by using numerical manifold method
Feng REN, Lifeng FAN, Guowei MA
《结构与土木工程前沿(英文)》 2011年 第5卷 第2期 页码 199-207 doi: 10.1007/s11709-011-0102-1
关键词: stress wave propagation defected rock numerical manifold method viscoelastic behavior storage modulus loss modulus
Mosbeh R. KALOOP, Alaa R. GABR, Sherif M. EL-BADAWY, Ali ARISHA, Sayed SHWALLY, Jong WAN HU
《结构与土木工程前沿(英文)》 2019年 第13卷 第6期 页码 1379-1392 doi: 10.1007/s11709-019-0562-2
关键词: Least Square Support Vector Machine Artificial Neural Network resilient modulus Recycled Concrete Aggregate Recycled Clay Masonry
Lingyun YOU, Kezhen YAN, Nengyuan LIU
《结构与土木工程前沿(英文)》 2020年 第14卷 第2期 页码 487-500 doi: 10.1007/s11709-020-0609-4
关键词: asphalt pavement interlayer conditions finite element method artificial neural network back-calculation
The stress relaxation of cement clinkers under high temperature
Xiufang WANG,Yiwang BAO,Xiaogen LIU,Yan QIU
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 413-417 doi: 10.1007/s11465-015-0357-7
The energy consumption of crushing is directly affected by the mechanical properties of cement materials. This research provides a theoretical proof for the mechanism of the stress relaxation of cement clinkers under high temperature. Compression stress relaxation under various high temperatures is discussed using a specially developed load cell, which can measure stress and displacement under high temperatures inside an autoclave. The cell shows that stress relaxation dramatically increases and that the remaining stress rapidly decreases with an increase in temperature. Mechanical experiments are conducted under various temperatures during the cooling process to study the changes in the grinding resistance of the cement clinker with temperature. The effects of high temperature on the load-displacement curve, compressive strength, and elastic modulus of cement clinkers are systematically studied. Results show that the hardening phenomenon of the clinker becomes apparent with a decrease in temperature and that post-peak behaviors manifest characteristics of the transformation from plasticity to brittleness. The elastic modulus and compressive strength of cement clinkers increase with a decrease in temperature. The elastic modulus increases greatly when the temperature is lower than 1000 °C. The compressive strength of clinkers increases by 73.4% when the temperature drops from 1100 to 800 °C.
关键词: stress relaxation high temperature cement clinker compression elastic modulus
张强,陆利蓬
《中国工程科学》 2003年 第5卷 第11期 页码 47-50
采用Fourier谱展开和紧致有限差分格式,选用两组共振三波为相干结构的初值,计算了其在零压和逆压梯度作用下的演化。对演化后期流场的2,4象限的运动进行了详细的分析。结果发现,在逆压梯度下,扫掠对雷诺应力的贡献要强于喷射。无论是在零压梯度还是逆压梯度下,uv和u2在法向的输运主要是靠Q2和Q4这两种运动来完成的。零压梯度下喷射部分对输运的贡献大于扫掠的部分。而在逆压梯度下喷射部分对输运的贡献明显减少,扫掠的作用要强于喷射。
《结构与土木工程前沿(英文)》 页码 1211-1227 doi: 10.1007/s11709-023-0983-9
关键词: RAP complex modulus SHStS transformation rejuvenation behavior of asphalt binder and mixture
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
标题 作者 时间 类型 操作
Effect of anisotropic characteristics on the mechanical behavior of asphalt concrete overlay
Lingyun YOU, Zhanping YOU, Kezhen YAN
期刊论文
Diffusive gradients in thin films using molecularly imprinted polymer binding gels for in situ measurements
Ying Cui, Feng Tan, Yan Wang, Suyu Ren, Jingwen Chen
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
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
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
Prediction of falling weight deflectometer parameters using hybrid model of genetic algorithm and adaptive neuro-fuzzy inference system
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
Simulation of viscoelastic behavior of defected rock by using numerical manifold method
Feng REN, Lifeng FAN, Guowei MA
期刊论文
Predicting resilient modulus of recycled concrete and clay masonry blends for pavement applications using
Mosbeh R. KALOOP, Alaa R. GABR, Sherif M. EL-BADAWY, Ali ARISHA, Sayed SHWALLY, Jong WAN HU
期刊论文
Assessing artificial neural network performance for predicting interlayer conditions and layer modulus
Lingyun YOU, Kezhen YAN, Nengyuan LIU
期刊论文
The stress relaxation of cement clinkers under high temperature
Xiufang WANG,Yiwang BAO,Xiaogen LIU,Yan QIU
期刊论文
Linear viscoelastic behavior of asphalt binders and mixtures containing very high percentages of reclaimed asphalt pavement
期刊论文