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Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0731-1
关键词: aero-engine blade displacement response dynamic strain reconstruction mode shape strain gauge
Experimental monitoring of the strengthening construction of a segmental box girder bridge and field
Ali Fadhil NASER, Zonglin WANG
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 308-320 doi: 10.1007/s11709-012-0140-3
关键词: prestressed concrete box girder monitoring external tendons strain deflection
Compressive behavior and microstructure of concrete mixed with natural seawater and sea sand
《结构与土木工程前沿(英文)》 2021年 第15卷 第6期 页码 1347-1357 doi: 10.1007/s11709-021-0780-2
关键词: seawater and sea sand concrete compressive strength strain field microstructure hydration products
梁 晋,郭 翔,胡 浩,李磊刚,唐正宗,史宝全,孙 涛
《中国工程科学》 2013年 第15卷 第1期 页码 51-56
提出并实现了一种基于工业摄影测量和数字图像的相关法,通过多种工业相机拍摄的多幅二维序列图像,快速解算出被测物体的三维坐标、变形和应变数据的方法。该方法解决了大型复杂工件生产现场快速检测难题,达到国际先进水平,可用于中小型工件和微纳米尺度工件的相关检测,以及材料性能分析,也可满足低速到高速的振动冲击和模态分析要求。在机械、材料力学等多个行业和多个学科的应用表明,该方法具有适用面广、三维全场检测、快速灵活方便的优点,取得了显著的经济和社会效益。
Concepts and implementation of strain-based criteria in design codes for steel structures
Reidar BJORHOVDE
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 210-216 doi: 10.1007/s11709-012-0165-7
关键词: steel stress-strain characteristics tension test strain design actual behavior improved design codes
Strain and process engineering toward continuous industrial fermentation
《化学科学与工程前沿(英文)》 2023年 第17卷 第10期 页码 1336-1353 doi: 10.1007/s11705-022-2284-6
关键词: continuous fermentation productivity contamination strain degeneration metabolic engineering
Behavior of steel fiber–reinforced high-strength concrete at medium strain rate
Chujie JIAO, Wei SUN, Shi HUAN, Guoping JIANG
《结构与土木工程前沿(英文)》 2009年 第3卷 第2期 页码 131-136 doi: 10.1007/s11709-009-0027-0
关键词: steel fiber–reinforced high-strength concrete (SFRHSC) high strain rates split Hopkinson press bar (SHPB) strain rate hardening effects
Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI
《机械工程前沿(英文)》 2015年 第10卷 第2期 页码 187-197 doi: 10.1007/s11465-015-0339-9
In this paper, for the first time, the modified strain gradient theory is used as a new size-dependent Kirchhoff micro-plate model to study the effect of interlayer van der Waals (vdW) force for the vibration analysis of multilayered graphene sheets (MLGSs). The model contains three material length scale parameters, which may effectively capture the size effect. The model can also degenerate into the modified couple stress plate model or the classical plate model, if two or all of the material length scale parameters are taken to be zero. After obtaining the governing equations based on modified strain gradient theory via principle of minimum potential energy, as only infinitesimal vibration is considered, the net pressure due to the vdW interaction is assumed to be linearly proportional to the deflection between two layers. To solve the governing equation subjected to the boundary conditions, the Fourier series is assumed for w=w(x, y). To show the accuracy of the formulations, present results in specific cases are compared with available results in literature and a good agreement can be seen. The results indicate that the present model can predict prominent natural frequency with the reduction of structural size, especially when the plate thickness is on the same order of the material length scale parameter.
关键词: graphene van der Waals (vdW) force modi- fied strain gradient elasticity theory size effect parameter
FEM-based strain analysis study for multilayer sheet forming process
Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 373-379 doi: 10.1007/s11465-015-0371-9
Fiber metal laminates have many advantages over traditional laminates (e.g., any type of fiber and resin material can be placed anywhere between the metallic layers without risk of failure of the composite fabric sheets). Furthermore, the process requirements to strictly control the temperature and punch force in fiber metal laminates are also less stringent than those in traditional laminates. To further explore the novel method, this study conducts a finite element method-based (FEM-based) strain analysis on multilayer blanks by using the 3A method. Different forming modes such as wrinkling and fracture are discussed by using experimental and numerical studies. Hydroforming is used for multilayer forming. The Barlat 2000 yield criteria and DYNAFORM/LS-DYNA are used for the simulations. Optimal process parameters are determined on the basis of fixed die-binder gap and variable cavity pressure. The results of this study will enhance the knowledge on the mechanics of multilayer structures formed by using the 3A method and expand its commercial applications.
关键词: finite element method (FEM) strain analysis multilayer sheet forming
Stress-strain relationship of concrete in freeze-thaw environment
ZOU Chaoying, ZHAO Juan, LIANG Feng
《结构与土木工程前沿(英文)》 2008年 第2卷 第2期 页码 184-188 doi: 10.1007/s11709-008-0029-3
关键词: stress-strain theoretical freeze-thaw capacity reference eighteen concrete
Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions
《结构与土木工程前沿(英文)》 页码 915-934 doi: 10.1007/s11709-023-0907-8
关键词: fictitious soil pile soil plug pipe piles high-strain dynamic analysis one-dimensional wave theory pile dynamics
Influence of freeze–thaw damage gradient on stress–strain relationship of stressed concrete
《结构与土木工程前沿(英文)》 页码 1326-1340 doi: 10.1007/s11709-023-0014-x
Separation and extraction of bridge dynamic strain data
Baijian WU, Zhaoxia LI, Ying WANG, T. H. T. CHAN,
《结构与土木工程前沿(英文)》 2009年 第3卷 第4期 页码 395-400 doi: 10.1007/s11709-009-0049-7
关键词: dynamic valuable separatrix strain/stress amplitude frequency
《结构与土木工程前沿(英文)》 2022年 第16卷 第2期 页码 145-160 doi: 10.1007/s11709-022-0806-4
关键词: strain-hardening cementitious composites engineered cementitious composites sprayable shotcrete strengthening concrete-face rockfill dam digital image correlation
标题 作者 时间 类型 操作
Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses
期刊论文
Experimental monitoring of the strengthening construction of a segmental box girder bridge and field
Ali Fadhil NASER, Zonglin WANG
期刊论文
Concepts and implementation of strain-based criteria in design codes for steel structures
Reidar BJORHOVDE
期刊论文
Behavior of steel fiber–reinforced high-strength concrete at medium strain rate
Chujie JIAO, Wei SUN, Shi HUAN, Guoping JIANG
期刊论文
Vibration analysis of nano-structure multilayered graphene sheets using modified strain gradient theory
Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI
期刊论文
FEM-based strain analysis study for multilayer sheet forming process
Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR
期刊论文
Stress-strain relationship of concrete in freeze-thaw environment
ZOU Chaoying, ZHAO Juan, LIANG Feng
期刊论文
Separation and extraction of bridge dynamic strain data
Baijian WU, Zhaoxia LI, Ying WANG, T. H. T. CHAN,
期刊论文