نتایج جستجو برای: shear test

تعداد نتایج: 877961  

Journal: :Microelectronics Reliability 2004
C. W. Tan Y. C. Chan H. P. Chan N. W. Leung C. K. So

The demand for volume deployment of photonic components has increased, and with it the need to effectively manufacture in a reproducible and cost effective way. Therefore, it is important to keep the assembly process consistent and stable. A simple shear test setup was used in this study to determine the shear force that can be used as an instant indicator to the process stability of fiber arra...

Journal: :journal of dentistry, tehran university of medical sciences 0
soodabeh sadat sajadi assistant professor, department of orthodontics, arak university of medical science, arak, iran. gholamreza eslami amirabadi assistant professor, department of orthodontics, dental school, shahed university, tehran, iran. sepideh sajadi assistant professor, department of endodontics, arak university of medical science, arak, iran.

bond failure of brackets during orthodontic treatment is a common problem; which results in treatment interference, increased treatment time and prolonged clinical time for rebonding of failed brackets. the purpose of this study was to evaluate the effects of coca-cola and a non-alcoholic beer on the shear bond strength and adhesive remnant index (ari) of orthodontic metal brackets in vitro.eig...

2001
F. J. C. RADEMACHER

In the literature ample attention is given to the assumptions on which the interpretation of shear-test results from a Jenike shear tester are based. Very little is said, however, about the influence on the test data of the construction of the apparatus itself. In the work described here, the authors have investigated the influence of the loading mechanism on the results. The original Jenike-ty...

Journal: :Journal of Structural and Construction Engineering (Transactions of AIJ) 2007

2017
Qiyun Qiao Wenwen Zhang Zhiwei Qian Wanlin Cao Wenchao Liu

In order to quantitatively evaluate the shear-bearing capacity of shear connectors of square concrete filled steel tube (CFST), push-out tests on 14 square CFSTs with shear connectors have been carried out. Among the 14 CFSTs, there are 13 specimens with steel plate connectors and one specimen with steel bar connectors. The following factors are investigated to figure out their influences on th...

Lightweight steel framing is a method in housing and construction that have been widely used in lightweight steel construction. In this method, the structure is built by cold formed steel elements. They are cost-effective, light, and easy to assemble. However, the performance of lateral load resisting systems in cold-formed steel structures specially the behavior of cold-formed steel shear wall...

Journal: :نشریه دانشکده فنی 0
مسعود ریاضی محمدرضا اصفهانی

in this research, using the modified compression field theory (mcft), a new truss based model is proposed to predict the behavior of reinforced concrete coupling beams with diagonal reinforcement. the model is able to consider the effects of shear and axial forces and bending moment, simultaneously. the proposed model includes a nonlinear shear spring, an axial spring, two inclined truss member...

Journal: :journal of lasers in medical sciences 0
ayoub pahlavan department of operative dentistry, school of dentistry, tehran university of medical sciences, tehran, iran mobin mehmanchi dental students’ research center, school of dentistry, tehran university of medical sciences, tehran, iran. ladan ranjbar omrani department of operative dentistry and dental research center, school of dentistry, tehran university of medical sciences, tehran, iran. nasim chiniforush laser research center of dentistry, school of dentistry, tehran university of medical sciences, tehran, iran.

introduction: the aim of this study was to assess shear bond strength of composite to dentin after air abrasion and laser treatment. methods: 40 human extracted molars divided into 4 groups (n=10) received the following treatments. group 1: carbide bur, group 2: air abrasion with aluminum oxide 50 μm, group 3: irradiated with erbium-doped yttrium aluminum garnet (er: yag) laser (150 mj/20hz), g...

Journal: :international journal of civil engineering 0
h. ziari iust, tehran,iran h. divandari islamic azad university, nowshahr branch, department of engineering, nowshahr, iran

pavement permanent deformations due to lack of shear strength in mixture are a major reason of rutting. any simple test to determine mixtures resistance to permanent deformation isn’t distinguished in the 1st level of superpave mix design method and prevalent methods for evaluating mixture rut resistance are expensive and time-consuming. two aggregate types, gradations, asphalt cements and fill...

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