http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Shafique M.A. Khan (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Effect of the thickness on the mixed mode crack front fields
Khan, Shafique M.A. Techno-Press 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.42 No.5
Results pertaining to 3D investigations on the effect of the thickness on the stress fields at the crack front are presented. A 3D finite element analysis is performed using a modified single edge-notched tension specimen configuration, with an inclined crack to include mixed mode I-II. A technique to mesh the crack front (3D) with singular finite elements in ANSYS without using third party software is introduced and used in this study. The effect of the specimen thickness is explicitly investigated for six thicknesses ranging from 1 to 32 mm. In addition, three crack inclination angles, including pure Mode-I, are used to study the effect of mixed-mode I-II fracture. An attempt is made to correlate the extent of a particular stress state along the crack front to thickness. In addition, ${\sigma}_{zz}/{\nu}({\sigma}_{xx}+{\sigma}_{yy})$ contours at the crack front are presented as a useful means to analyze the stress state.
-
Effect of the thickness on the mixed mode crack front fields
Shafique M.A. Khan 국제구조공학회 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.42 No.5
Results pertaining to 3D investigations on the effect of the thickness on the stress fields at the crack front are presented. A 3D finite element analysis is performed using a modified single edgenotched tension specimen configuration, with an inclined crack to include mixed mode I-II. A technique to mesh the crack front (3D) with singular finite elements in ANSYS without using third party software is introduced and used in this study. The effect of the specimen thickness is explicitly investigated for six thicknesses ranging from 1 to 32 mm. In addition, three crack inclination angles, including pure Mode-I, are used to study the effect of mixed-mode I-II fracture. An attempt is made to correlate the extent of a particular stress state along the crack front to thickness. In addition, σzz /ν (σxx + σyy) contours at the crack front are presented as a useful means to analyze the stress state.
-
Structural and magnetic studies on Zr doped ZnO diluted magnetic semiconductor
G. Murtaza,R. Ahmad,M.S. Rashid,M. Hassan,A. Hussnain,Muhammad Azhar Khan,M. Ehsan ul Haq,M.A. Shafique,S. Riaz 한국물리학회 2014 Current Applied Physics Vol.14 No.2
In this study, Zirconium doped Zn1xZrxO (with x ¼ 0.00e0.10) samples have been prepared by formal solid-state reaction technique. The Zr doped ZnO samples annealed at 1100 C and characterized by different characterization techniques, such as X-ray diffraction (XRD), Scanning electron microscope (SEM), Vibrating sample magnetometer (VSM) and Fourier transform infrared spectroscopy (FTIR). The Xray diffraction (XRD) used to study the structural properties. XRD pattern showed that lattice parameters, “a”, “c”, unit cell volume and ZneO bond length increase with doping content (x 0.04) where as these decrease with x > 0.04. On the other hand, reverse trend observed with lattice distortion. The crystallite size decreases with increasing doping content of Zr. FTIR employed to investigate functional chemical bonding properties of different elements and compounds present in materials. The low, medium and high frequency absorption bands observed at 630, 1500 and 3435 cm1, which were the common features of ZneO, HeOeH and OeH bond respectively. SEM used to study surface morphology and measured grain size of specimen. The surface becomes dense and grain size decreases with increasing degree of Zr contents. The SEM micrograph also shows the presence of spherical micro size particles and formation of pores in samples. Magnetic properties were obtained using VSM. The samples exhibit room temperature ferromagnetism. The magnetic hysteresis loops show variation in the value of magnetic parameter. The saturation magnetization (Ms) and coercivity (Hc) decrease, while remanence magnetization (Mr) shows gradually increasing trend with Zr content. VSM measurement reveals that sample Zn0.96Zr0.4O show better result as compared to x ¼ 0.06e0.10.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
