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

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

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...

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.

A Study on the Fine Structure of the Lateral Line Organ of the Sea Eel

1973 ◽  
Vol 31 ◽  
pp. 648-649
Author(s):  
K. Hama
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Lateral Line ◽  
Low Frequency ◽  
Sensory Cells ◽  
Apical Surface ◽  
Voltage Electron ◽  
Sensory Epithelia ◽  
Low Frequency Vibration ◽  
Transmission Electron

The lateral line organs of the sea eel consist of canal and pit organs which are different in function. The former is a low frequency vibration detector whereas the latter functions as an ion receptor as well as a mechano receptor.The fine structure of the sensory epithelia of both organs were studied by means of ordinary transmission electron microscope, high voltage electron microscope and of surface scanning electron microscope.The sensory cells of the canal organ are polarized in front-caudal direction and those of the pit organ are polarized in dorso-ventral direction. The sensory epithelia of both organs have thinner surface coats compared to the surrounding ordinary epithelial cells, which have very thick fuzzy coatings on the apical surface.

ALUMINUM 220

Alloy Digest ◽  
1962 ◽  
Vol 11 (3) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
High Temperature ◽  
Heat Treating ◽  
Casting Alloy ◽  
Aluminum Casting ◽  
Aluminum Casting Alloy ◽  
Temperature Performance ◽  
Aluminum Company

Abstract ALUMINUM 220 is a 10% magnesium-aluminum casting alloy having the highest combination of mechanical properties, corrosion resistance and machinability. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-112. Producer or source: Aluminum Company of America.

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