scholarly journals Ligand-dependent nano-mechanical properties of CdSe nanoplatelets: calibrating nanobalances for ligands affinity monitoring.

Nanoscale ◽  
2021 ◽  
Author(s):  
Quentin Martinet ◽  
Justine Baronnier ◽  
Adrien Girard ◽  
Tristan Albaret ◽  
Lucien Saviot ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Raman Scattering ◽  
Cadmium Selenide ◽  
Vibration Frequency ◽  
Low Frequency ◽  
Frequency Shifts ◽  
Low Frequency Vibration

The influence of ligands on the low frequency vibration of different thicknesses cadmium selenide colloidal nanoplatelets is investigated using resonant low frequency Raman scattering. The strong vibration frequency shifts induced...

EXPERIMENTAL STUDY OF ENERGY ABSORPTION PROPERTIES OF GRANULAR MATERIALS UNDER LOW FREQUENCY VIBRATIONS

2004 ◽  
Vol 18 (17n19) ◽  
pp. 2708-2712
Author(s):  
MAO-BIN HU ◽  
XIANG-ZHAO KONG ◽  
QING-SONG WU ◽  
ZHEN-GANG ZHU
Keyword(s):  
Experimental Study ◽  
Granular Materials ◽  
Energy Absorption ◽  
Vibration Frequency ◽  
Absorption Rate ◽  
Low Frequency ◽  
Vibration Energy ◽  
Torsion Pendulum ◽  
Absorption Properties ◽  
Low Frequency Vibration

The low frequency vibration energy absorption properties of granular materials have been investigated on an Invert Torsion Pendulum (ITP). The energy absorption rate of granular material changes nonlinearly with amplitude under low frequency vibration. The frequency of ITP system increases a little with granular materials in the holding cup. The vibration frequency of ITP system does not change with time.

scholarly journals Application of Digital Image Correlation to Measurement of Packaging Material Mechanical Properties

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Jian-Wei Zhou ◽  
Dong-Hong Liu ◽  
Lan-Yuan Shao ◽  
Zhen-Lin Wang
Keyword(s):  
Mechanical Properties ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Poisson Ratio ◽  
Low Frequency ◽  
Measurement Range ◽  
Image Correlation ◽  
Packaging Materials ◽  
Entire Area ◽  
Low Frequency Vibration

Among various packaging materials, papers and polymer plastics are the most common due to their light weights, low costs, and other advantages. However, their mechanical properties are difficult to measure precisely because of their softness. To overcome the difficulty, a new measure instrument prototype is proposed based on an optical method known as the digital image correlation (DIC). Experiments are designed to apply the DIC to measure mechanical properties of flexible packaging materials, including the stress-strain relationship, the Poisson ratio, the coefficient of heat expansion, the creep deformation, and the top-pressure deformation of corrugated box. In addition, the low frequency vibration of package is simulated, and the vibration frequencies are measured by DIC. Results obtained in the experiments illustrate the advantages of the DIC over traditional methods: noncontact, no reinforced effect, high precision over entire area, wide measurement range, and good measurement stability.

scholarly journals Finite Element Investigation of the Effects of the Low-Frequency Vibration Generated by Vehicle Driving on the Human Lumbar Mechanical Properties

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Ruo-xun Fan ◽  
Jie Liu ◽  
Yong-li Li ◽  
Jun Liu ◽  
Jia-zi Gao
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Lumbar Spine ◽  
Nucleus Pulposus ◽  
Vibrational Frequency ◽  
Low Frequency ◽  
Fluid Loss ◽  
Low Frequency Vibration ◽  
Human Lumbar Spine

Long-term exposure to low-frequency vibration generated by vehicle driving impairs human lumbar spine health. However, few studies have investigated how low-frequency vibration affects human lumbar mechanical properties. This study established a poroelastic finite element model of human lumbar spinal segments L2–L3 to perform time-dependent vibrational simulation analysis and investigated the effects of different vibrational frequencies generated by normal vehicle driving on the lumbar mechanical properties in one hour. Analysis results showed that vibrational load caused more injury to lumbar health than static load, and vibration at the resonant frequency generated the most serious injury. The axial effective stress and the radial displacement in the intervertebral disc, as well as the fluid loss in the nucleus pulposus, increased, whereas the pore pressure in the nucleus pulposus decreased with increased vibrational frequency under the same vibrational time, which may aggravate the injury degree of human lumbar spine. Therefore, long-term driving on a well-paved road also induces negative effects on human lumbar spine health. When driving on a nonpaved road or operating engineering machinery under poor navigating condition, the auto seat transmits relatively high vibrational frequency, which is highly detrimental to the lumbar spine health of a driver.

Improved mechanical properties and structure of PP/nano-CaCO3 blends prepared by low-frequency vibration injection molding

2008 ◽  
Vol 57 (1) ◽  
pp. 23-27 ◽  
Author(s):  
Gao Xueqin ◽  
Xu Jing ◽  
Chen Zhanchun ◽  
Deng Cong ◽  
Shen Kaizhi
Keyword(s):  
Mechanical Properties ◽  
Injection Molding ◽  
Low Frequency ◽  
Low Frequency Vibration

Configuration Method of Fixing System with 2-Dimensionally Low-Frequency Vibration for Drilling to Decrease Influence from Unintended Displacement of Workpiece

2015 ◽  
Vol 9 (2) ◽  
pp. 161-169
Author(s):  
Ivan Burdukovskyi ◽  
◽  
Jun’ichi Kaneko ◽  
Kenichiro Horio
Keyword(s):  
Vibration Frequency ◽  
Thrust Force ◽  
Function Analysis ◽  
Low Frequency ◽  
Drilling Process ◽  
Deep Drilling ◽  
Machining Time ◽  
Hard Materials ◽  
Error Frequency ◽  
Low Frequency Vibration

Micro deep drilling of hard materials requires introducing of step feed in process that increases machining time. To decrease the machining time by increasing the step feed, we apply low-frequency vibration (∼10 μm, 150 – 250 Hz) to the drilling process by oscillating the workpiece. To cope with the low-frequency vibration-assisted drilling of a curved surface, we have developed a fixing system for 2-dimensional vibration. The Fixing System for 2-Dimensional Vibration (FS2DV) consists of horizontal, and vertical actuators plus spring systems with variable rigidities along the directions of the actuators. A thrust force of 6 – 10 N from the drilling process may induce an unintended displacement of the workpiece. If the rigidities of the horizontal and the vertical spring systems are not balanced, unintended displacement may create diameter error during the drilling process. In this study, a method is proposed for configuring of the FS2DV with balanced spring systems to minimize the effects of the unintended displacement on diameter error. Frequency response function analysis of the vertical and horizontal spring systems is done for successful use of the FS2DV during the low-frequency vibration-assisted 2-axis drilling. Based on this analysis, setting requirements for the FS2DV are proposed for a particular vibration frequency. The behavior of the resultant vibration is evaluated while force is loaded along the intended angle of the drilling process. As a result, the effects of unintended displacement at the FS2DVare decreased for use within the vibration frequency range of 150 – 250 Hz with the vibration amplitude of 10 μm. The system can be used properly with a thrust force of up to 10 N and any angle from 0 to 90° by selecting appropriate rigidities for the spring systems.

scholarly journals Influence of Low-Frequency Vibration and Modification on Solidification and Mechanical Properties of Al-Si Casting Alloy

Materials ◽  
2017 ◽  
Vol 10 (5) ◽  
pp. 560 ◽  
Author(s):  
Vadim Selivorstov ◽  
Yuri Dotsenko ◽  
Konstantin Borodianskiy
Keyword(s):  
Mechanical Properties ◽  
Low Frequency ◽  
Casting Alloy ◽  
Low Frequency Vibration

Conditions of Possible Application of Vibration Processing in the Course of Welding

2019 ◽  
Vol 946 ◽  
pp. 883-888 ◽  
Author(s):  
M.Z. Zaripov ◽  
A.M. Fairushin ◽  
D.V. Karetnikov
Keyword(s):  
Mechanical Properties ◽  
Low Frequency ◽  
Pilot Studies ◽  
Low Frequency Vibration ◽  
Positive Action ◽  
Welding Cycle ◽  
Fatigue Endurance

Enough works in which positive action of the vibration fluctuations imposed both in the course of welding of a design and after it is specified are known. In the article features of influence of low-frequency vibration fluctuations in the course of a welding cycle on properties of welded connections from steel A 516-55 are considered. The conducted pilot studies of influence of vibration influence of a welding bathtub in the course of welding on structure and physico-mechanical properties of metal of welded connections have allowed to prove positive action of this technology which leads to increase in durability and fatigue endurance of welded connections. This fact will allow to expand using of technology of vibration processing in the course of welding for production of the welded equipment of various type.

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