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 : Mingxue Qi (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Mechanical Performance of 3D-Printing Plastic Honeycomb Sandwich Structure
Chun Lu,Mingxue Qi,Shafiul Islam,Ping Chen,Shuangsheng Gao,Yanrong Xu,Xiangdong Yang 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.5 No.1
In this study, Bi-Grid, Tri-Grid, Quadri-Grid and Kagome-Grid honeycombs were designed and fabricated using 3D printing technology Sandwich composites were prepared by gluing the cores and composite face sheets together. Mechanical performance of the sandwich structures were characterized using finite element analysis and three-point bending test. Results indicate that when suffering from bending loads, the stress concentrations are located at the loading zone on upper face sheets (distributed in both sides of the indenter) and supporting zone on bottom face sheets, and the stress concentration zones of the honeycomb cores are located in the area that between indenter and supports. The failure mechanism of the Bi-Grid sandwich structure is interfacial de-bonding between composite face sheet and Bi-Grid core, and the failure modes of the Tri-Grid, Quadri-Grid and Kagome-Grid are core shear. The mechanical performance of Quadri-Grid sandwich structure is better than that of the other three structures.
-
Effect of Texture and Microstructure on Tensile Behaviors in the Polycrystalline Pure Niobium
Shanshan Zhang,Yuancai Liu,Tiewei Xu,Mingxue Sun,Qi Zhang,Yong Wan 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10
Pure polycrystalline niobium had different texture and microstructure due to the RCD-60, RCD-84 and CD-84 fabricationprocesses and recrystallization at 1000 °C for 2 h. The tensile behaviors and texture evolutions of the niobium were investigatedto reveal the correlation of initial texture/microstructure and tensile properties. The crucial differences of microstructureand orientations after recrystallization would influence tensile properties of the niobium. The differences of tensile behaviorsduring tension testing correspond to the different microstructure and texture evolution in the niobium. The enhanced ⟨110⟩ //RD texture during the tensile deformation indicates that orientations of sub-structures are arranging along the tensile axis inthe RCD-60 niobium. The RCD-84 and CD-84 niobium present the other phenomenon, that sub-structures near the fractureoccur a significant rotation and the ⟨110⟩ // RD texture has been slightly changed after tensile failure. The recrystallizedniobium fabricated by the RCD-84 obtains excellent tensile properties with ultimate tensile strength of 364 MPa and elongationof 55%. The strain hardening rate of the CD-84 niobium is the highest during the initial stage of tensile deformation,and becomes lower than that of the RCD-84 niobium after the 16% strain. Furthermore, the analysis of Taylor factors isapplied to reveal the difference of hardening rates during tensile deformation due to different fabrication and recrystallizationprocesses of the polycrystalline niobium.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
