نتایج جستجو برای: tensile strength

تعداد نتایج: 220960  

2011
Yoichi Mimura Isamu Yoshitake Wenbo Zhang

The present study aims to obtain the tensile properties of early age concrete based on a uniaxial tension test employing RC slender members. First, the paper shows that concrete strain is equal to the strain of rebar at the mid-span of the RC member. The tensile Young's modulus and the strain capacity of early age concrete are estimated using strain measurements. The experiment indicated that t...

Journal: :journal of dental research, dental clinics, dental prospects 0
milad motamedi farnaz fattahi

background and aims. in order to fabricate prostheses with high accuracy and durability, soldering techniques have been introduced to clinical dentistry. however, these prostheses always fail at their solder joints. the purpose of this study was to evaluate the effect of gap distance on the tensile strength of base metal solder joints. materials and methods. based on ada/iso 9693 specifications...

Journal: :The Journal of experimental biology 2008
Christine Ortlepp John M Gosline

This study documents the effect of body mass on the size and strength of draglines produced by the orb-weaving spider Araneus diadematus and the jumping spider Salticus scenicus. Silk samples obtained from individuals spanning the range from first-instar juveniles to gravid adults were tested to determine both the properties of the silk material and the strength and static safety factor of the ...

Journal: :journal of dentistry, tehran university of medical sciences 0
ms. ahmad akhoundi associate professor, dental research center, tehran university of medical sciences, tehran, iran m. rahmati kamel assistant professor, school of dentistry, babol university of medical sciences, babol, iran sh. mahmood hashemi orthodontist, private practice m. imani postgraduate student, department of orthodontics, school of dentistry, tehran university of medical

objective: the objective of this study was to compare the tensile bond strength of metal brackets bonding to glazed ceramic surfaces using three various surface treatments. materials and methods: forty two glazed ceramic disks were assigned to three groups. in the first and second groups the specimens were etched with 9.5% hydrofluoric acid (hfa). subsequently in first group, ceramic primer and...

Journal: :journal of dental research, dental clinics, dental prospects 0
saeed shirkavand elnaz moslehifard

background and aims. adding further fillers to dental resins may enhance their physical characteristics. the aim of this study was to evaluate the tensile strength of heat-curing acrylic resin reinforced by tio2 nanoparticles added into the resin matrix. materials and methods. commercially available tio2 nanoparticles were obtained and characterized using x-ray diffraction (xrd) and scanning ele...

Journal: :geopersia 2015
mohammad hossein ghobadi sajeddin mousavi mojtaba heidari behrouz rafie

this study investigates the correlations among the tensile strength, mineral composition, and textural features of twenty-ninesandstones from kouzestan province. the regression analyses as well as artificial neural network (ann) are also applied to evaluatethe correlations. the results of simple regression analyses show no correlation between mineralogical features and tensile strength.however,...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی استان فارس - دانشکده دندانپزشکی 1385

چکیده ندارد.

Journal: :civil engineering infrastructures journal 0
hasan taherkhani assistant professor, civil engineering department, university of zanjan, zanjan, iran

the performance of asphaltic pavements during their service life is highly dependent on the mechanical properties of the asphaltic layers. therefore, in order to extend their service life, scientists and engineers are constantly trying to improve the mechanical properties of the asphaltic mixtures. one common method of improving the performance of asphaltic mixtures is using different types of ...

2009

Pressurized water reactor (PWR) cores operate under extreme environmental conditions due to coolant chemistry, operating temperature, and neutron exposure. Extending the life of PWRs requires detailed knowledge of the changes in mechanical and corrosion properties of the structural austenitic stainless steel components adjacent to the fuel (internals) that are inherent to such conditions. This ...

2013
BM Gersak JS Sauer

Results The USP Class I Min. Avg. 2-0 Suture Knot-Pull Tensile Strength (Doubled for Loop Test) is defined as 2.88 kgf. The Tensile Strength of Lot # 1-9364 was 4,7761 ± 0,2005 kgf (mean ± std dev) min 4.2282, max 5.2289, and for Lot # 1-9364 was 5,5151 ± 0,2625 kgf (mean ± std dev) min 4,0044, max 5,1356, respectively. There were no statistically signiffcant differences between the both lots (...

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