http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Effect of some welding parameters on nugget size in electrical resistance spot welding
Ömer Savaş 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.18 No.2
In this study, the effects of weld parameters on nugget size and tensile-shear strength of welding joint in electrical resistance spot welding of galvanized DP 600 steel sheets having 1.2 mm were investigated. Taguchi design method has been employed to examine the effects of five parameters of welding current, electrode pressure, welding time, clamping time and holding time by using the L27 (53) orthogonal array. Results showed that the most effective parameters on tensile shear strength and the nugget size ratio (hn/dn) were found as welding current and welding time, whereas electrode pressure, clamping time and holding time were less effective factors. Max. 545 MPa strength was obtained through proposed optimum conditions by Taguchi technique.
Ramazan Kayikci,Ömer Savaş 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.19 No.3
Production and properties of metal matrix composites reinforced with an in-situ high aspect ratio AlB2 flake have been investigated. Boron 2.2wt.% was dissolved in pure Al and Al-Cu alloy at 1300℃ by adding directly boron oxide which resulted in 4 vol.% reinforcing phase. The in-situ AlB2 flake concentration was increased up to 30 vol.% in order to increase the tensile strength of the composites. Hardness, compressive strength and tensile strength of the composite were measured and compared with their matrix. Results showed that 30 vol.% A1B2/Al composite show a 193% increase in the compressive strength and a 322% increase in compressive yield strength. Results also showed that ductility of composites decreases with adding AlB2 reinforcements.
Ömer Faruk Akça,Savas¸ Yılmaz 대한신경정신의학회 2015 PSYCHIATRY INVESTIGATION Vol.12 No.1
Several medications are reported to be effective in treatment of encopresis. However, mechanisms of action related to these drugs are not known. We report a patient with ADHD and encopresis whose encopretic signs have disappeared with long acting methylphenidate while they have not changed with atomoxetine.