نتایج جستجو برای: non destructive test

تعداد نتایج: 2037929  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی 1391

in this study, the effects of oleothermal modification on physical and mechanical peroperties of fir wood (abeis sp.) blocks were examined. at first, some blocks of fir wood with 5 × 20 × 120 cm dimensions were prepared. the blocks were treated in soybean oil. the effects of 3 factors such as treatments temperature (180and 200 °c), holding time (12 and 15 h) and initial moisture content of wood...

Journal: :international journal of civil engineering 0
r. abbasnia tehran, iran a. farsaei tehran, iran

corrosion of reinforcing steel and other embedded metals is the main cause of severe deterioration in reinforced concrete structures which subsequently imposes adverse effects on ultimate and serviceability limit state performance of the whole structure. in this paper, a new corrosion detection method for reinforced concrete beams, based on wavelet analysis is presented. to evaluate the capabil...

Journal: :international journal of advanced design and manufacturing technology 0
mohammadmahdi amiri phd student center of excellence in precision dimensional measurement technology development institute (tdi), acecr, sharif university branch. tehran, iran. m. tabatabaee ghomi assistant professor center of excellence in precision dimensional measurement technology development institute (tdi), acecr, sharif university branch. tehran, iran. *corresponding author gh. liaghat full professor mechanical engineering department tarbiat modares university tehran, iran.

in this paper a new method for nondestructive testing or nondestructive evaluation is proposed for glass-epoxy composite. for this purpose, impact-echo is used to evaluate the properties of composite materials, detecting internal defects and thickness measurement. in the impact-echo method a steel ball impacts on a composite plate and generates stress waves or p-waves which will be transferred ...

2000
S. Barcherini L. Cipiccia M. Maggi Simone G. O. Fiori Pietro Burrascano

Sophisticated methods have often been developed in order to analyze the structure of materials and, in particular, to explain their microstructure or to make clear internal and superficial defects, such as cracks and notches. It is known, in fact, that the properties which determine the choice of a particular material for scientific applications strictly depend on its microstructure. Moreover, ...

Journal: :International Journal of Scientific Research in Science and Technology 2020

Journal: :Periodicals of Engineering and Natural Sciences (PEN) 2019

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