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 : Yuanchun Huang (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Consolidation of Unsaturated Drainage Well Foundation with Smear Effect under Time-Dependent Loading
Yuanchun Huang,Tianyi Li,Xianlei Fu 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.3
In real practice, the construction of drainage wells is always accompanied by smear effect, whereas it is scarcely discussed in the field of unsaturated soils. In this case, on the basis of the widely-accepted consolidation theory for unsaturated stratum by Fredlund, this paper studies the equal strain consolidation characteristics of unsaturated foundation with drain wells affected by smear effect under time-varying loading (exponential loading as a case). Firstly, with the consideration of corresponding boundary conditions, the governing equations under the equal strain hypothesis are obtained. Afterwards, decoupling process, constant variation method and Fourier series expansion theory are utilized to get the analytical solutions, which are then verified to be credible by means of the finite difference method. Finally, the consolidation patterns of the drainage well foundation modeling in unsaturated soils are studied against hydraulic coefficients, modeling sizes and loading parameter. It reveals that the smear effect can significantly restrain the consolidation process of the foundation by drain wells, while different parameters will lead to various results.
-
Rong Fu,Yuanchun Huang,Yu Liu,Hui Li 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.9
The thermal deformation behavior in homogenized 2195 Al–Li alloy was studied at different deformation temperatures(370–520 °C and strain rates (0.001–1 s−1). The flow stress decreases with decreasing strain rate or increasing temperature. The significant decrease in flow stress from 370 to 420 °C is related to the fact that movements of dislocations and (sub)grain boundaries at low temperatures are hindered by the dynamic precipitation of numerous fine secondary phases (mainlyAl2CuLi(T1) phases). Meanwhile, it was found that flow localization regions appear in the microstructure at 370 °C/1 s−1. Besides, DRX and DRV increase with decreasing lnZ (Zener–Hollomon parameter) values, particularly for lnZ values lessthan 26.32 (520 °C/0.1 s−1). The DRX mechanism was discussed for different lnZ based on the variation of misorientationangle and the characteristics of different DRXs. The DDRX is dominant when lnZ ≥ 30.70; CDRX and DDRX dominate at30.70 > lnZ > 26.32; CDRX mainly occurs at lnZ ≤ 26.32; when lnZ value decreases to 21.72, DRX grains with the characteristicsof CDRX and GDRX appear.
-
Xu Wang,Yongxing Zhao,Yuanchun Huang 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.9
Hot extrusion was introduced to the Mg–10Gd–3Y–1.5Zn–0.5Zr alloy and microstructure evolution, texture configurationand elevated-temperature mechanical properties were investigated. The results show that the LPSO phase network-distributedalong grain boundaries in the as-cast and homogenized alloys is broken and elongated after extrusion, and is streamlined alongthe extrusion direction (ED). After extrusion, a completely recrystallized microstructure with equiaxed grains of ~ 10 μmis formed. The most notable feature in as-extruded alloy is numerous fine lamellar structures in DRXed grains, which wereidentified as basal stacking faults (SFs) with nano-spaced by TEM analysis. The < 0001 > //TD texture results in the hardorientation of most grains along ED. The extruded alloy exhibits excellent elevated-temperature mechanical properties(UTS/287 MPa and YS/218 MPa at 300 °C; UTS > 200 MPa at 350 °C) along ED, which is significantly higher than alloyswith similar composition or even higher rare earth content. The high elevated-temperature strength is mainly related to thefiber strengthening effect of streamline-distributed LPSO, the skeleton support effect of numerous SFs with nano spacing,and the texture strengthening effect of hard grain orientation.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
