http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
조계평(Guiping Zhao),시호문(Ho-Mun Si),이흥식(Heungshik Lee),조종두(Chongdu Cho) 한국표면공학회 2004 한국표면공학회지 Vol.37 No.5
This paper describes a three-dimensional transient finite element model for a laser cladding process. In the model, an adaptive finite element technique is used for dilution control. Using the proposed finite element model, the effects of process parameters such as scanning speed, laser's power, and preheating on the dilution of clad layer, the shape of melting pool, and the temperature distribution are calculated. It is also shown that the optimal process parameters for the required dilution can be determined from the proposed finite element model. An experiment is performed to validate the proposed model. The numerical results are compared with experimental ones.
( Guiping Hu ),( Yan Zhao ),( Bo Liu ),( Fengqing Song ),( Min Sheng You ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.11
The Bacterial community structure and its complexity of the enrichment culture during the isolation and screening of imidacloprid-degrading strain were studied using denaturating gradient gel electrophoresis analysis. The dominant bacteria in the original tea rhizosphere soil were uncultured bacteria, Rhizobium sp., Sinorhizobium, Ochrobactrum sp., Alcaligenes, Bacillus sp., Bacterium, Klebsiella sp., and Ensifer adhaerens. The bacterial community structure was altered extensively and its complexity reduced during the enrichment process, and four culturable bacteria, Ochrobactrum sp., Rhizobium sp., Geobacillus stearothermophilus, and Alcaligenes faecalis, remained in the final enrichment. Only one indigenous strain, BCL-1, with imidacloprid-degrading potential, was isolated from the sixth enrichment culture. This isolate was a gram-negative rod-shaped bacterium and identified as the genus Ochrobactrum based on its morphological, physiological, and biochemical properties and its 16S rRNA gene sequence. The degradation test showed that approximately 67.67% of the imidacloprid (50 mg/l) was degraded within 48 h by strain BCL-1. The optimum conditions for degradation were a pH of 8 and 30oC. The simulation of imidacloprid bioremediation by strain BCL-1 in soil demonstrated that the best performance in situ (tea soil) resulted in the degradation of 92.44% of the imidacloprid (100 mg/g) within 20 days, which was better than those observed in the ex situ simulations that were 64.66% (cabbage soil), 41.15% (potato soil), and 54.15% (tomato soil).
Mode Ⅲ 형 DCB 및 TDCB 알루미늄 폼 접합구조물의 정적 파괴 연구
이정호,Guiping Zhao,조재웅 한국기계기술학회 2016 한국기계기술학회 학술대회논문집 Vol.2016 No.10
In this study, the fracture property of the bonded structure with aluminum foam is analyzed by using the closed aluminium foam for impact absorber. DCB and TDCB specimens manufactured with the single lap joint method of mode 3 are designed by varying the thickness. The static analysis through ANSYS finite element program is carried out on the specimen model due to each thickness. Also, the static experiment is performed in order to verify the analysis result. This study aims at comparing the shear strengths of the bonded structures of DCB and TDCB made with aluminum foam and investigating the mechanical properties.
적층각도를 지닌 CFRP 삼점굽힘 시험편에서의 좌굴복원특성에 관한 연구
황규완,Guiping Zhao,조재웅 한국기계기술학회 2016 한국기계기술학회 학술대회논문집 Vol.2016 No.10
In this study, the buckling restoration at CFRP 3-Point bending specimen composed of 30°, 45°and 60° is investigated when the pressure at the lowest position on the compressed specimen is eliminated. The fracture configuration and stress contour of the specimen can be seen according to the laminate angle of fiber. The result of this study is thought to apply the data for the safe design of CFRP structure.
Computational mechanics of laser cladding process
Cho, Chongdu,Zhao, Guiping,Kwak, Si-Young,Kim, Chang Boo Elsevier 2004 Journal of materials processing technology Vol. No.
<P><B>Abstract</B></P><P>Laser cladding process accompanies phase transformations through melting (on heating) and solidifying (on cooling), which is an irreversible thermodynamic process. Most of analyses on material processing by laser as a heat source have been conducted on models of neglecting the latent heat in the process just for the reason of simplification. In this study the previous important works are summarized. And to further investigate the effects of latent heat on laser cladding process, this study develops a program accommodating an algorithm for enforcing the latent heat to run with ABAQUS™. The simulation technique of this study is verified by direct comparison of the present prediction with experimental publications elsewhere; the numerical results agreed accurately with the experiments. As a result, it is found that more accurate conclusions come out when considering the latent heat in process analyses.</P>