By using the Finite Element Inverse Approach based on the Hill quadratic anisotrop-ically yield criterion and the quadrilateral element, a fast analyzing software-FASTAMP for the sheet metal forming is developed. The ...By using the Finite Element Inverse Approach based on the Hill quadratic anisotrop-ically yield criterion and the quadrilateral element, a fast analyzing software-FASTAMP for the sheet metal forming is developed. The blank shapes of three typical stampings are simulated and compared with numerical results given by the AUTOFORM software and experimental results, respectively. The comparison shows that the FASTAMP can predict blank shape and strain distribution of the stamping more precisely and quickly than those given by the traditional methods and the AUTOFORM.展开更多
Based on the elastic-plastic large deformation finite element formulation as well as the shell element combined discrete Kirchhoff theoretical plate element (DKT) with membrane square element, deep-drawing bending spr...Based on the elastic-plastic large deformation finite element formulation as well as the shell element combined discrete Kirchhoff theoretical plate element (DKT) with membrane square element, deep-drawing bending springback of typical U-pattern is studied. At the same time the springback values of the drawing of patterns' unloading and trimming about the satellite aerial reflecting surface are predicted and also compared with those of the practical punch. Above two springbacks all obtain satisfactory results, which provide a kind of effective quantitative pre-prediction of springback for the practical engineers.展开更多
Objective: to analyze the value of microbiological test in gynecological inflammation and infection. Methods: 80 cases of gynecological inflammation and infection in our hospital were randomly divided into groups. The...Objective: to analyze the value of microbiological test in gynecological inflammation and infection. Methods: 80 cases of gynecological inflammation and infection in our hospital were randomly divided into groups. The control group was tested by culture method, while the observation group was tested by agglutination method. The test results of the two groups were compared. Results: the positive rate of Candida in the observation group was 82.00% by agglutination method and 81.00% in the control group by culture method. The positive rate of Candida in the two groups was p > 0.05;The average culture time of the observation group was shorter than that of the control group (P < 0.05). Conclusion: agglutination method or culture method has high test value in gynecological inflammation and infection. The two microbiological test methods can be combined in clinic, so as to further improve the test accuracy.展开更多
基金Project supported by the National Natural Sciences Foundation of China(No. 50335060).
文摘By using the Finite Element Inverse Approach based on the Hill quadratic anisotrop-ically yield criterion and the quadrilateral element, a fast analyzing software-FASTAMP for the sheet metal forming is developed. The blank shapes of three typical stampings are simulated and compared with numerical results given by the AUTOFORM software and experimental results, respectively. The comparison shows that the FASTAMP can predict blank shape and strain distribution of the stamping more precisely and quickly than those given by the traditional methods and the AUTOFORM.
基金This project is supported by National Natural Science Foundation of China (No.19832020)Provincial Natural Science Foundation of Jilin (No.20000519)
文摘Based on the elastic-plastic large deformation finite element formulation as well as the shell element combined discrete Kirchhoff theoretical plate element (DKT) with membrane square element, deep-drawing bending springback of typical U-pattern is studied. At the same time the springback values of the drawing of patterns' unloading and trimming about the satellite aerial reflecting surface are predicted and also compared with those of the practical punch. Above two springbacks all obtain satisfactory results, which provide a kind of effective quantitative pre-prediction of springback for the practical engineers.
文摘Objective: to analyze the value of microbiological test in gynecological inflammation and infection. Methods: 80 cases of gynecological inflammation and infection in our hospital were randomly divided into groups. The control group was tested by culture method, while the observation group was tested by agglutination method. The test results of the two groups were compared. Results: the positive rate of Candida in the observation group was 82.00% by agglutination method and 81.00% in the control group by culture method. The positive rate of Candida in the two groups was p > 0.05;The average culture time of the observation group was shorter than that of the control group (P < 0.05). Conclusion: agglutination method or culture method has high test value in gynecological inflammation and infection. The two microbiological test methods can be combined in clinic, so as to further improve the test accuracy.
