scholarly journals Simplified Evaluation of Young's Modulus for Thin Plates and Wires by Axial Compression Method-Report of Research Committee on Evaluation of Elastic Property for Thin Plates and Wires-

2006 ◽  
pp. 63-74 ◽  
Author(s):  
Research Committee on Evaluation of
Keyword(s):  
Elastic Property ◽  
Young’S Modulus ◽  
Axial Compression ◽  
Young's Modulus ◽  
Thin Plates ◽  
Compression Method ◽  
Research Committee

Morphology and Mechanical Properties of Poly(Lactic Acid) with Propylene-Ethylene Copolymer and α-Cellulose

2019 ◽  
Vol 947 ◽  
pp. 200-204
Author(s):  
Sirirat Wacharawichanant ◽  
Patteera Opasakornwong ◽  
Ratchadakorn Poohoi ◽  
Manop Phankokkruad
Keyword(s):  
Lactic Acid ◽  
Young’S Modulus ◽  
Interfacial Adhesion ◽  
Morphological Analysis ◽  
Young's Modulus ◽  
Spherical Shape ◽  
Poly Lactic Acid ◽  
Compression Method ◽  
Ethylene Copolymer ◽  
Internal Mixer

This work studied the improvement of poly (lactic acid) (PLA) properties by adding propylene-ethylene copolymer (PEC) and α-cellulose (AC). The PLA blends and composites were melt mixed by an internal mixer and molded by compression method. The morphological analysis observed the phase separation of PLA/PEC blends due to minor PEC phase dispersed as spherical shape in PLA phase, indicating a poor interfacial adhesion between PLA and PEC phases. The incorporation of AC did not improve the compatibility of polymer blends. Young’s modulus and tensile strength of PLA blends reduced with increasing amount of PEC because the elastics of ethylene molecules in PEC structure. Young’s modulus of PLA/PEC/AC composites increased with increasing AC contents. The stress at break of the PLA/PEC blends was improved with the presence of AC. The strain at break of PLA/PEC blends increased with increasing PEC contents, and the presence of AC showed the decrease of strain at break of PLA/PEC blends.

A New Method of Measuring Young's Modulus for Flexible Thin Materials Using a Cantilever

2006 ◽  
Vol 3-4 ◽  
pp. 53-58 ◽  
Author(s):  
Atsumi Ohtsuki
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Thin Sheet ◽  
New Method ◽  
Thin Plates ◽  
Flexible Materials ◽  
Steel Material ◽  
Fiber Optical ◽  
Deformation Behaviors ◽  
Fiber Materials

This paper describes a development of a new method (: Cantilever Method) to measure Young’s modulus of flexible materials. The method is based on a nonlinear deformation theory that takes into account large deformation behaviors. A set of testing devices was designed and machined. Measurements were carried out on two kinds of flexible materials (PVC: a high-polymer material and SWPA: a steel material). The modulus measured by this method is “Secant modulus”. The results of my evaluation confirm that the new method is suitable for flexible thin plates or rods. Based on the assessments made the method can be further applied to thin sheet and fiber materials (e.g., steel belt, glass fiber, carbon fiber, optical fiber, etc.).

Nonlinear Vibrations of Beams, Strings, Plates, and Membranes Without Initial Tension

2004 ◽  
Vol 71 (4) ◽  
pp. 551-559 ◽  
Author(s):  
Zhongping Bao ◽  
Subrata Mukherjee ◽  
Max Roman ◽  
Nadine Aubry
Keyword(s):  
Boundary Conditions ◽  
Young’S Modulus ◽  
Cross Sections ◽  
Nonlinear Vibrations ◽  
Young's Modulus ◽  
Thin Plates ◽  
Radius Of Gyration ◽  
Initial Tension ◽  
Various Boundary Conditions ◽  
Analytical Expressions

The subject of this paper is nonlinear vibrations of beams, strings (defined as beams with very thin uniform cross sections), plates and membranes (defined as very thin plates) without initial tension. Such problems are of great current interest in minute structures with some dimensions in the range of nanometers (nm) to micrometers (μm). A general discussion of these problems is followed by finite element method (FEM) analyses of beams and square plates with different boundary conditions. It is shown that the common practice of neglecting the bending stiffness of strings and membranes, while permissible in the presence of significant initial tension, is not appropriate in the case of nonlinear vibrations of such objects, with no initial tension, and with moderately large amplitude (of the order of the diameter of a string or the thickness of a plate). Approximate, but accurate analytical expressions are presented in this paper for the ratio of the nonlinear to the linear natural fundamental frequency of beams and plates, as functions of the ratio of amplitude to radius of gyration for beams, or the ratio of amplitude to thickness for square plates, for various boundary conditions. These expressions are independent of system parameters—the Young’s modulus, density, length, and radius of gyration for beams; the Young’s modulus, density, length of side, and thickness for square plates. (The plate formula exhibits explicit dependence on the Poisson’s ratio.) It is expected that these results will prove to be useful for the design of macro as well as micro and nano structures.

scholarly journals The Elastic Property of Bulk Silicon Nanomaterials through an Atomic Simulation Method

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Jixiao Tao ◽  
Yuzhou Sun
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Elastic Property ◽  
Young’S Modulus ◽  
Silicon Nanowires ◽  
Young's Modulus ◽  
Poisson Ratio ◽  
Bulk Silicon ◽  
Atomic Simulation ◽  
Element Method

This paper reports a systematic study on the elastic property of bulk silicon nanomaterials using the atomic finite element method. The Tersoff-Brenner potential is used to describe the interaction between silicon atoms, and the atomic finite element method is constructed in a computational scheme similar to the continuum finite element method. Young’s modulus and Poisson ratio are calculated for[100],[110], and[111] silicon nanowires that are treated as three-dimensional structures. It is found that the nanowire possesses the lowest Young’s modulus along the[100] direction, while the[110] nanowire has the highest value with the same radius. The bending deformation of[100] silicon nanowire is also modeled, and the bending stiffness is calculated.

THE ELASTIC PROPERTIES OF SILICA GELS

1949 ◽  
Vol 27b (10) ◽  
pp. 781-790 ◽  
Author(s):  
L. A. Munro ◽  
J. G. McNab ◽  
W. L. Ott
Keyword(s):  
Young’S Modulus ◽  
Elastic Properties ◽  
Young's Modulus ◽  
Silica Gels ◽  
Effect Of Temperature ◽  
Compression Method ◽  
Silicate Concentration ◽  
Acid Gel ◽  
Increasing Temperature ◽  
Effect Of Age

The effect of age, concentration, and temperature on the Young's modulus of acid and alkaline silica gels bas been measured by a compression method. For the range of concentrations used the Young's modulus is not independent of load. The modulus increases with age of the gel and with concentration. Hurd's criterion of the time of set (tilted rod method) has been evaluated in terms of absolute units. The effect of temperature on the elastic properties is different for acid and alkaline gels. The Young's modulus values for the former (pH 5.6) increase, while for the alkaline gel (pH 8.2) of the same silicate concentration the values decrease with increasing temperature. The modulus for the alkaline gel is higher than for the acid gel at the lower temperatures. A mechanism is suggested to explain these differences.

scholarly journals Determination of Bending and Axial Compression Young’s Modulus of Cellular Mortar Exposed to High Temperatures

2018 ◽  
Vol 7 (2.23) ◽  
pp. 99 ◽  
Author(s):  
M A. Othuman Mydin ◽  
N Mohamad ◽  
I Johari ◽  
A A. Abdul Samad
Keyword(s):  
Compressive Strength ◽  
Young’S Modulus ◽  
Axial Compression ◽  
High Temperatures ◽  
Porous Body ◽  
Room Temperature ◽  
Bending Strength ◽  
Young's Modulus ◽  
Cement Matrix

This paper focuses on laboratory investigation to scrutinize and portray the Young’s modulus of cellular mortar exposed to high temperatures. Two densities of cellular mortar of 600 and 900 kg/m3 density were cast and tested under axial compression and 3-point bending. The tests were performed at room temperature, 105°C, 205°C, 305°C, 405°C, 505°C, and 605°C. The results of this study consistently indicated that the loss in toughness for cement based material like cellular mortar exposed to high temperatures happens principally after 105°C, irrespective of density of cellular mortar. This specifies that the principal contrivance instigating stiffness deprivation is micro cracking in the cement matrix, which happens as water magnifies and disappears from the porous body. As projected, decreasing the density of cellular mortar diminishes its compressive strength and bending strength. Though, for cellular mortar of different densities, the normalized strength-temperature and Young’s modulus-temperature relationships are comparable.  

Mechanical properties of FeAlSi powders prepared by mechanical alloying from different initial feedstock materials

2019 ◽  
Vol 107 (2) ◽  
pp. 207 ◽  
Author(s):  
Jaroslav Čech ◽  
Petr Haušild ◽  
Miroslav Karlík ◽  
Veronika Kadlecová ◽  
Jiří Čapek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Young’S Modulus ◽  
Milling Time ◽  
Young's Modulus ◽  
Element Model ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Particles ◽  
Complete Homogenization

FeAl20Si20 (wt.%) powders prepared by mechanical alloying from different initial feedstock materials (Fe, Al, Si, FeAl27) were investigated in this study. Scanning electron microscopy, X-ray diffraction and nanoindentation techniques were used to analyze microstructure, phase composition and mechanical properties (hardness and Young’s modulus). Finite element model was developed to account for the decrease in measured values of mechanical properties of powder particles with increasing penetration depth caused by surrounding soft resin used for embedding powder particles. Progressive homogenization of the powders’ microstructure and an increase of hardness and Young’s modulus with milling time were observed and the time for complete homogenization was estimated.

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