scholarly journals Study on factors affecting the mechanical behavior of soil-aggregate-cement mixtures

2021 ◽  
Author(s):  
Luíza Rijo Valoura
Keyword(s):  
Mechanical Behavior ◽  
Soil Aggregate ◽  
Factors Affecting ◽  
Cement Mixtures

scholarly journals A Comprehensive Review of the Mechanical Behavior of Suspension Bridge Tunnel-Type Anchorage

2019 ◽  
Vol 2019 ◽  
pp. 1-19 ◽  
Author(s):  
Yafeng Han ◽  
Xinrong Liu ◽  
Ning Wei ◽  
Dongliang Li ◽  
Zhiyun Deng ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Failure Modes ◽  
Load Transfer ◽  
Mechanical Response ◽  
Soft Rock ◽  
Suspension Bridge ◽  
Development Trend ◽  
Factors Affecting ◽  
Research Results ◽  
Rock Strata

The recent surge of interest towards the mechanical response of rock mass produced by tunnel-type anchorage (TTA) has generated a handful of theories and an array of empirical explorations on the topic. However, none of these have attempted to arrange the existing achievements in a systematic way. The present work puts forward an integrative framework laid out over three levels of explanation and practical approach, mechanical behavior, and calculation method of the ultimate pullout force to compare and integrate the existing findings in a meaningful way. First, it reviews the application of TTA in China and analyzes its future development trend. Then, it summarizes the research results of TTA in terms of load transfer characteristics, deformation characteristics, failure modes, and calculation of ultimate uplift resistance. Finally, it introduces four field model tests in soft rock (mainly mudstone formations), and some research results are obtained. Furthermore, it compares the mechanical behavior of TTA in hard rock strata and soft rock strata, highlighting the main factors affecting the stability of TTA in soft rock formation. This paper proposes a series of focused topics for future investigation that would allow deconstruction of the drivers and constraints of the development of TTA.

Mechanical Evaluation of the “Euler” Test Probe

1990 ◽  
Vol 112 (1) ◽  
pp. 75-77
Author(s):  
E. Suhir ◽  
W. E. Benedetto
Keyword(s):  
Mechanical Behavior ◽  
Experimental Evaluation ◽  
Measured Data ◽  
Physical Design ◽  
Factors Affecting ◽  
Test Probe ◽  
Major Factors ◽  
Good Agreement ◽  
Lateral Deflections

The study contains a theoretical and experimental evaluation of the mechanical behavior of wires in a flexible (“Euler”) test probe, including buckling, axial and lateral deflections and stresses. The developed formulas are simple, easy-to-use and clearly indicate the role of the major factors affecting the wire performance. Calculations, executed for an Everett-Charles 32 point probe, are in good agreement with the measured data. Some recommendations for smaller stresses in the wires are presented. The obtained results could be of help in the analysis and physical design of “Euler” test probes.

Study of hidden factors affecting the mechanical behavior of soil–rock mixtures based on abstraction idea

2020 ◽  
Author(s):  
Hui Dong ◽  
Bocheng Peng ◽  
Qian-Feng Gao ◽  
Yin Hu ◽  
Xiuzi Jiang
Keyword(s):  
Mechanical Behavior ◽  
Factors Affecting

scholarly journals Triaxial Test and Mechanical Analysis of Rock-Soil Aggregate Sampled from Natural Sliding Mass

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Shuling Huang ◽  
Xiuli Ding ◽  
Yuting Zhang ◽  
Wei Cheng
Keyword(s):  
Mechanical Behavior ◽  
Large Scale ◽  
Mechanical Response ◽  
Strain Curve ◽  
Friction Angle ◽  
Mechanical Analysis ◽  
Soil Aggregate ◽  
Hydropower Plant ◽  
Triaxial Tests ◽  
Confining Pressures

Rock-soil aggregate, as a specific geomaterial, exhibits complicated mechanical behavior. The rock-soil aggregate sampled from the deep layer of sliding mass at Jinpingzi area of Wudongde hydropower plant on Yangtze River is investigated to understand its mechanical behavior. Large-scale laboratory triaxial tests are conducted considering different gradations, stone contents and confining pressures. The results show that variation of stone content and gradation considerably affects the mechanical characteristics of rock-soil aggregate. Further, the influences of stone content, and gradation variation on stress-strain curve, Mohr-Coulomb criterion based shear strength parameters, Duncan-Chang model based deformation parameters, and internal friction angle are analyzed. A modified Rowe’s stress-dilatancy equation describing the mechanical response of rock-soil aggregate is then suggested.

Factors affecting the mechanical behavior of Y-TZP

2014 ◽  
Vol 37 ◽  
pp. 78-87 ◽  
Author(s):  
Ferhan Egilmez ◽  
Gulfem Ergun ◽  
Isil Cekic-Nagas ◽  
Pekka K. Vallittu ◽  
Lippo V.J. Lassila
Keyword(s):  
Mechanical Behavior ◽  
Factors Affecting

Factors affecting the mechanical behavior of collagen hydrogels for skin tissue engineering

2017 ◽  
Vol 69 ◽  
pp. 85-97 ◽  
Author(s):  
Marco Pensalfini ◽  
Alexander E. Ehret ◽  
Silvia Stüdeli ◽  
Daniela Marino ◽  
Andres Kaech ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Mechanical Behavior ◽  
Skin Tissue ◽  
Factors Affecting ◽  
Skin Tissue Engineering ◽  
Collagen Hydrogels

scholarly journals Changes of Soil Aggregate Stability as a Result of the Effect of Freeze-thaw Cycles

2015 ◽  
Vol 63 (4) ◽  
pp. 1211-1218 ◽  
Author(s):  
Aneta Žabenská ◽  
Miroslav Dumbrovský
Keyword(s):  
Aggregate Stability ◽  
Soil Surface ◽  
Vegetation Period ◽  
Soil Aggregate ◽  
Ex Situ ◽  
Soil Erodibility ◽  
Factors Affecting ◽  
Soil Aggregate Stability ◽  
Freeze Thaw ◽  
Aggregate Fraction

The objective of the present research was to assess the changes in soil erodibility during the non-vegetation period as one of the factors affecting the snowmelt erosion. The temperature fluctuation was simulated with the use of a climatic chamber ex situ. The soil surface was for simplicity reasons considered without any plant or snow cover. The paper deals with the rate of soil erodibility determination – the soil erodibility should increase due to the decrease of soil aggregate stability depending on the number of freeze-thaw cycles and initial soil moisture. Soil samples (taken from three sites) were subjected to freeze-thaw cycles under laboratory conditions. Changes in soil agreggate stability were monitored as one of the main soil characteristics which determine the soil erodibility. Two methods were used to determine the soil macroaggregate stability (soil aggregate fraction 1–2 mm): standard single-sieve method of wet sieving (Kemper and Rosenau, 1986), and dry aggregate analysis using a set of flat sieves with a diameter of 1 mm and 0.5 mm. The results of each method are controversial. Intended hypothesis has not been clearly confirmed.

Factors Affecting the Fracture Strength of Freestanding Diamond Films

2013 ◽  
Vol 537 ◽  
pp. 1-6
Author(s):  
J.H. Song ◽  
F.X. Lu ◽  
L.F. Hei ◽  
C.M. Li ◽  
W.Z. Tang ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Fracture Strength ◽  
Diamond Films ◽  
Deep Understanding ◽  
Nitrogen Addition ◽  
Engineering Material ◽  
Factors Affecting ◽  
Deposition Parameters ◽  
Technology Applications ◽  
New Type

As an emerging brand new type of engineering material for a variety of important high technology applications, the deep understanding of the mechanical behavior of freestanding diamond films has become an emergent task of vital importance. Unfortunately the mechanical behavior of this brand new material is not fully understood. Effects that affect the fracture strength are still not very clear except that the fracture strength of freestanding diamond films is only depended on the grain size (film thickness), and is insensitive to the microscopic defects, and the strength is considerably higher when the nucleation side is in tension than that when the growth side is in tension. However, this is not the full story. Based on the experimental date accumulated in USTB (University of Science and Technology Beijing) for high power dc arcjet diamond films, other factors that may affect the fracture strength of freestanding diamond films are discussed in detail. Effects of the quality of the diamond films, impurities (nitrogen, hydrogen, non-diamond carbon etc.), film morphology and texture, on fracture strength are discussed. Effects of the deposition parameters are explained. Advantages for small amount of nitrogen addition, and for the use of higher substrate temperatures in the increase in fracture strength are demonstrated, which have already been applied in the mass production of tool grade freestanding diamond films. It is hoped that the present paper will be helpful for those who wish to understand and use this brand new type of engineering material

Modeling and Characterization of Nanowires With Microcantilever Beams

2006 ◽  
Author(s):  
J. He ◽  
C. M. Lilley
Keyword(s):  
Resonant Frequency ◽  
Mechanical Behavior ◽  
Actuation Voltage ◽  
Beam Structure ◽  
Fe Method ◽  
Resonant Frequencies ◽  
Alignment Effect ◽  
Factors Affecting ◽  
Microcantilever Beam

Mechanical behavior of a nanowire-microcantilever beam structure under electrostatic actuation was studied using the FE method. A comparison for the resonant frequencies between a nanowire-microcantilever structure and a microcantilever only is presented. Several factors affecting the resonant frequency of the nanowire-microcantilever structure, such as actuation voltage and fabrication effects on geometries are discussed. Also, alignment effect of the nanowires with the microcantilever beam is investigated. This study can be utilized to predict Young's modulus of nanowires.

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