Windows - Classification of mechanical properties - Racking, torsion and operating forces

2020 ◽  
Keyword(s):  
Mechanical Properties

A multiscale topography analysis of ground stainless steel and titanium alloys

2007 ◽  
Vol 221 (9) ◽  
pp. 1407-1420 ◽  
Author(s):  
S Giljean ◽  
M Bigerelle ◽  
K Anselme
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Titanium Alloys ◽  
Roughness Parameter ◽  
Roughness Parameters ◽  
Observation Scale ◽  
316L Austenitic Stainless Steel ◽  
The Mean ◽  
Best Parameter

This study aims to perform a multiscale analysis of abraded surfaces of 316L austenitic stainless steel and titanium alloys (TiAl6V4) grinded at different paper grades. The authors propose to answer the following question: For a given distribution of silicon carbide grains of the paper, what is the best roughness parameter and at which scale must it be evaluated better to discriminate the effect of the mechanical properties of the materials? Paper grades from 80 to 4000 were used under identical pressure and erosion time. It can be concluded that the values of the amplitude roughness parameters depend on the observation scale. It is outlined that the abrasion process is very reproducible. A statistical analysis is then proposed, first, to define a classification of the relevance of the roughness parameters for each grain size distribution, and second, to determine at which scale the mechanical properties of the bulk are more influenced for all paper grades. Finally, at relevant scales, the Abbott amplitude parameters roughness kernel (RK) is the best parameter to discriminate the paper grade effect. The mean distance between asperities (SM) is the preferred method for determining the wear effect on materials and the linear mean normalizing autocorrelation (AMNLN) is the preferred method for determining the interaction between paper grade and materials.

scholarly journals Regression analysis and statistical examination of Knoop Hardness on abrasion resistance in Lyca Beige Marbles

Filomat ◽  
2020 ◽  
Vol 34 (2) ◽  
pp. 609-614
Author(s):  
Burcu Aydin ◽  
Fusun Yalcin ◽  
Ozge Ozer ◽  
Gurhan Yalcin
Keyword(s):  
Mechanical Properties ◽  
Regression Analysis ◽  
Physical And Mechanical Properties ◽  
Production Method ◽  
Knoop Hardness ◽  
Decomposition Products ◽  
Marble Quarries ◽  
Selection Of

Marbles are secondary decomposition products formed by metamorphism of limestone. Effective classification of marble quarries in terms of quality enables the selection of a sustainable production method and safety application. This evaluation is based on physico-mechanical properties of the samples. Obtained results of physico-mechanical properties of the marbles were statistically analyzed using Stata 14 and SPSS 21 software. The marbles indicated mostly normal physical and mechanical properties. A strong inverse relationship exists between Abrasion Value and Knoop Hardness Determination that indicates a significant nonlinear relationship. Samples were distinguished into 3 groups of close similarity and related properties. The estimated value of the parameters is in the 95 % confidence interval. The equation obtained by regression analysis was used for the determination of resistance to abrasion.

Classification of Mechanical Properties of Aluminum Foam by Machine Learning

2021 ◽  
Author(s):  
Yoshihiko Hangai ◽  
Kenji Okada ◽  
Yuuki Tanaka ◽  
Tsutomu Matsuura ◽  
Kenji Amagai ◽  
...  
Keyword(s):  
Machine Learning ◽  
Mechanical Properties ◽  
Aluminum Foam

Failure Behaviour of Semantan Bamboo Strips Loaded in Bending and Shear

2011 ◽  
Vol 462-463 ◽  
pp. 1176-1181
Author(s):  
Shahril Anuar Bahari ◽  
Mansur Ahmad
Keyword(s):  
Mechanical Properties ◽  
Microscopic Observation ◽  
Maximum Stress ◽  
Failure Modes ◽  
Vascular Bundles ◽  
Failure Behaviour ◽  
Modes Of Failure ◽  
Different Parts

In this study, the classification of modes of failure, the observation of microscopic failures and the mechanical properties of Semantan bamboo strips were investigated. Specimens were loaded in bending and shear parallel to grain. Specimens were taken from internodes and node parts in bottom, middle and top portions of bamboo culms. From the classification, different modes of failure occurred in different parts of Semantan bamboo culms loaded in bending and shear. From the microscopic observation, the failures occurred in both parenchyma and vascular bundles regions for all classified failure modes from all tests, except for Even Splitting Mode from shear. This mode exhibited failure in parenchyma only, without any failure in vascular bundles regions. The Maximum Stress (σml) values between failure modes for both tests were significantly different. Generally, anatomical behaviour at different culm’s parts had influenced the different modes of failure and microscopic failures of Semantan bamboo strips loaded in bending and shear.

Comparative Study on Classification and Discrimination of Silken Fabrics for Skirt

2011 ◽  
Vol 175-176 ◽  
pp. 1016-1023
Author(s):  
Cai Yuan Kuang
Keyword(s):  
Neural Network ◽  
Mechanical Properties ◽  
Euclidean Distance ◽  
Visual Basic ◽  
Determination Method ◽  
Tensile Shear ◽  
Bending Properties ◽  
Robust Property ◽  
Visual Basic 6.0

Significant interrelationships between skirt shapes and properties of fabrics have been found in skirt design. In this paper, the determination method, classified fabrics based on Euclidean distance and optimum cluster can be implemented by multivariate ANOVA was proposed, after testing tensile, shear and bending properties of 30 different kinds of silken fabrics, selected as subjects, with KES. Fisher discrimination module was developed by using Visual Basic 6.0 language based on Fisher discrimination functions through SPSS 10.0. Probability neural network (PNN), established based on mechanical properties of train samples, was employed to study the classification of new sample. And the classification results were studied comparatively. The results showed that the proposed method, based on Euclidean distance and multivariate ANOVA, is feasible, and those silken fabrics can be classified into three clusters. The results also indicated that Fisher discrimination module and PNN is feasible to distinguish cluster of new sample. Discrimination of silken fabrics is easy to operate because of Fisher module, and has strong robust property in noises of test samples for the reason of PNN.

An Attempt at a Rational Classification of the Principal Accelerators of Vulcanization

1929 ◽  
Vol 2 (3) ◽  
pp. 356-361
Author(s):  
G. Martin ◽  
R. Thiollet
Keyword(s):  
Mechanical Properties ◽  
The Other ◽  
Different Temperatures ◽  
Points Of View ◽  
Time Required ◽  
Rational Classification

Abstract AT the present time there are many accelerators on the market for the vulcanization of rubber, but it is often difficult to choose among them those best suited for a required purpose. Accelerators are often classed as slow medium, rapid and ultra rapid. These brief terms are entirely unsatisfactory for characterizing clearly the properties of these properties, and it frequently happens that two accelerators which have been placed together in one class behave in reality in very different ways and are not entirely replaceable one by the other. The object of this study is to establish a rational classification of the principal accelerators of vulcanization, which is based not only on their activity but also on their other important characteristics. The following points will be considered in their order: (1) The time required for the fixation of mixtures at different temperatures. (2) The time required to bring about vulcanization giving the maxima mechanical properties at different temperatures. (3) Aging. (4) These three points of view will be completed by a study of the plasticizing power and of the influence of different charges on the action of the accelerators.

MEASUREMENTS AND CHARACTERIZATIONS OF MECHANICAL PROPERTIES OF HUMAN SKINS

2013 ◽  
Vol 24 ◽  
pp. 1360029
Author(s):  
HAN WOOK SONG ◽  
YON KYU PARK
Keyword(s):  
Mechanical Properties ◽  
Alternative Medicine ◽  
Elastic Coefficient ◽  
Good Discrimination ◽  
Discrimination Ability ◽  
Repeatability Error ◽  
Skin Physiology ◽  
Decompression Tube ◽  
External Stimuli

A skin is an indispensible organ for humans because it contributes to metabolism using its own biochemical functions and protects the human body from external stimuli. Recently, mechanical properties such as a thickness, a friction and an elastic coefficient have been used as a decision index in the skin physiology and in the skin care market due to the increased awareness of wellbeing issues. In addition, the use of mechanical properties is known to have good discrimination ability in the classification of human constitutions, which are used in the field of an alternative medicine. In this study, a system that measures mechanical properties such as a friction and an elastic coefficient is designed. The equipment consists of a load cell type (manufactured by the authors) for the measurements of a friction coefficient, a decompression tube for the measurement of an elastic coefficient. Using the proposed system, the mechanical properties of human skins from different constitutions were compared, and the relative repeatability error for measurements of mechanical properties was determined to be less than 2%. Combining the inspection results of medical doctors in the field of an alternative medicine, we could conclude that the proposed system might be applicable to a quantitative constitutional diagnosis between human constitutions within an acceptable level of uncertainty.

scholarly journals Studies on effect of sugarcane bagasse fibre on mechanical properties and workability of low calcium fly ash and slag based geopolymer concrete

2021 ◽  
Vol 309 ◽  
pp. 01112
Author(s):  
T. Srinivas ◽  
Srimanthula Chandana ◽  
N V Ramana Rao
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Sugarcane Bagasse ◽  
Rest Period ◽  
Geopolymer Concrete ◽  
Inorganic Polymers ◽  
Low Calcium ◽  
Hardened Properties ◽  
Bagasse Fibre

Individuals from the group of inorganic polymers are known as geopolymers. The geopolymer material's compound organisation is similar to that of typical zeolitic materials, however the microstructure is undefined rather than translucent. The polymerisation interaction includes a considerably quick substance response under antacid condition on Si-Al minerals and that meets the basic properties of concrete as well as falls under classification of manageability. Utilization of various fibres like steel, glass, sugarcane bagasse etc, significantly influences fresh and hardened properties of concrete. Sugarcane bagasse fibre is a by-product from sugar industries and can be used as a fibre in concrete. The target of this paper is to study an effect of sugarcane bagasse fibre on mechanical properties such as compressive, tensile and flexural sgength and also the workability of low calcium fly ash (Class-F) and slag based geopolymer concrete of G40 grade which is équivalent to M40.. Sugarcane baggase ash fibre has been used for both the concencrte G40 and M40 as 0.5%,1%,1.5%,2%. All the samples were casted and oven cured at 60o for 24 hours after one day rest period and remaining days cured in an ambient temperature, then tested on 3rd, 7th and 28th day to assess the mechanical properties, such as Compressive, Tensile, and Flexure strength. The results were compared among controlled concrete (CC), controlled concrete with sugarcane bagasse fibre (CCF), geopolymer concrete (GPC) and geopolymer concrete with sugarcane bagasse fibre (GPCF). The results revealed that with addition of SCBF, the mechanical properties have been enhanced significantly.

scholarly journals How, where and when authentic traditions of Jaw Harp music of Siberia and the Far East have been forming.

2020 ◽  
pp. 9-32
Author(s):  
A. V. Nikolsky ◽  
E. Ye. Alekseyev ◽  
I. Ye. Alekxeyev ◽  
V. Ye. Dyakonova
Keyword(s):  
Mechanical Properties ◽  
Far East ◽  
Adequate Description ◽  
Accurate Identification ◽  
Modern Language ◽  
The Far East ◽  
Different Types ◽  
Manufacturing Technologies ◽  
Phonological Contrasts

This article reviews the milestones in the formation of acoustic, musicological, and cultural attributes of tonal organization in indigenous traditions of jaw harp music across Northeastern Eurasia – as related to the timeline of its geographic distribution. Phonology of jaw harp playing is compared to singing and speaking in establishing traits specific to jaw harp prosody. Based on the theories of harmonic residue and harmonic templates, a new model of phonological classification of jaw harp articulations is put forward. Phonological contrasts between jaw harp articulations are determined by the configuration of harmonics. Their configuration depends on mechanical properties of the material of which jaw harp is made. Different constructions of jaw harp produce different types of spectral texture. The general timeline of human mastering of various manufacturing technologies most likely determines the timeline of the succession of specific textural types. According to the entirety of the known information, the emergence of pan-cultural authentic Eastern Eurasian jaw harp tradition can be dated by 7–5 thousand years ago – after the establishment of the institution of personal song and prior to the formation of modern language families of Siberia and the Far East. The first part of this article defines the terminology required for accurate identification of music works created within the framework of traditional timbre-oriented music and for its adequate description. The article presents the preliminary results of the study of the perception of jaw harp articulations by its indigenous performers.

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