نتایج جستجو برای: Young's modulus

تعداد نتایج: 26235  

2015
Won Taek Oh

The modulus of elasticity Youngs modulus E is a material property, that. From the Hooks law the modulus of elasticity is defined as the ratio of the stress to.modulus of elasticity of the cultured SC cells examined in this study, in central, non-nuclear regions, ranged between. Johnson B.all require an effective E, the Youngs modulus or elastic modulus, to quantify. Elastic moduli, such as the ...

Deformation modulus of rock mass has a significant role in the support design of an underground excavation. It is determined by expensive in-situ tests or by empirical models. Existing models for estimation of deformation modulus do not consider its stress dependence. Herein, data from several sources is used to develop a stress- (depth-) dependent relation for estimation of deformation modulus...

2015
Cyrus Djahedi

Cellulose-based materials draw their good mechanical properties from the cellulose crystal. Improved understanding of crystal properties could lead to a wider range of applications for cellulose-based materials, Cellulose crystals show high axial Youngs modulus. Cellulose can attain several allomorphic forms which show unique structural arrangements in terms of both intra-molecular and intermol...

2003
J. G. Lavin P. L. Gai E. D. Boyes S. Subramoney

Single wall nanotubes have been demonstrated to have remarkable physical properties: Youngs Modulus of >ITPa; breaking strength of 100 G ~ and metallic conductivity. The most perfect examples of them have been produce~ via laser ablation or arc-discharge processes [1,2]. These processes are characterized by theft low productivity, of the order of grams per day per unit, and they are generally a...

Journal: :Express Polymer Letters 2021

Polymer composites were manufactured using biocarbon particles as a reinforcing filler to improve the mechanical and thermal properties. However, detailed examination of dispersion agglomeration is essential correlate matrix interactions with properties product. We investigated variations mechanical, behaviour fillers, polypropylene coconut shell composites. PP CSB prepared by melt mixing proce...

Journal: :Transportation geotechnics 2022

The uniaxial compressive strength (UCS) and Youngs’ modulus (E) of rock are important parameters required during design stability analysis mining geotechnical structures. There is correlation between UCS E rock, the proper estimation such for reliable engineering analysis. However, limited quantity data pairs often available most project sites makes it difficult to estimate E. This study addres...

2012
Douglass F. Jacobs Harmony J. Dalgleish C. Dana Nelson

Introduction American chestnut (Castanea dentata (Marsh.) Borkh. once occurred over much of the eastern deciduous forests of North America (Russell, 1987), with a natural range exceeding 800,000 km (Braun, 1950) (Figure 1). Castanea dentata was a dominant tree species throughout much of its range, comprising between 25-50% of the canopy (Braun, 1950; Foster et al., 2002; Russell, 1987; Stephens...

2010
Z. Kornain A. Jalar N. Amin R. Rasid C. S. Foong

Problem statement: This study mainly to study the effect of several commercial underfill materials to the reliability of HiCTE Flip Chip Ceramic Ball Grid Array (FC-CBGA) package due to Accelerated Thermal Cycling (ATC) effect. Approach: The warpage condition of package, die back stress, interfacial die shear stress, and solder bump fatigue for different commercial underfills were assessed and ...

Journal: :Journal of Alloys and Compounds 2021

Abstract In this study copper-silver (CuAg) structures with varying Ag content were fabricated by in situ alloying and Laser Powder Bed Fusion (L-PBF) Additive Manufacturing (AM). morphology, distribution elemental analysis conducted using Scanning Electron Microscopy (SEM) dynamic imaging for CuAg10, CuAg20 CuAg30 atomised powder. The resultant pore defect morphology each as built annealed CuA...

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