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Joinability and Mechanical Properties of Clinched Joints of Different Aluminum Alloys
Yue Zhang,Honghe Xu,Ruitao Peng,Yan Lu,Linwei Zhu 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.22 No.11
The joints of four aluminum alloy (7075, 5754, 6061, 1060) sheets were prepared using the clinching process with different die assemblies, and the forming and mechanical properties of the produced joints were evaluated using different testing procedures. The neck thickness, undercut values, bottom thickness, and joint dimensions of the joints were measured to investigate the joinability. The forming quality parameters, strength, failure displacement, failure mode, and energy absorption of the joints were investigated using the tensile shear test and peeling test. It was revealed that all four aluminum alloy sheets could form clinched joints with a suitable undercut, neck thickness and different die fits. A combination of SR5202 and SR703.12 dies resulted in an optimum joint quality for different sheets. Both neck thickness and the undercut amount played a major role in the determination of the strength of the joints. The best mechanical properties of the single-lap and cross joints were found for the sheets made from aluminum alloys 7075 and 6061. The aluminum alloy 5754 clinched joints exhibited slightly deteriorated mechanical properties but had the highest energy absorption capacity of the joints. However, the lower yield strength of aluminum alloy 1060 led to poor mechanical properties of these joints. All the single lap joints showed a tensile-shear failure mode of the upper sheet material, whereas the peel failure modes of the cross joints showed neck pull-off failure, neck fracture failure, and neck mixed failure.
Zhu, Yueying,Yang, Chuantian,Yue, Yuan,Zhao, Chengwen,Zhang, Yan The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.6
Two-phase simultaneous excitation mode of the switched reluctance motor (SRM) has been shown to effectively improve the average torque output compared with traditional single-phase excitation mode. But the torque ripple of the two-phase excitation SRM with traditional winding distribution increases because of the inconsistent electromagnetic field. To reduce the torque ripple, a two-phase excitation 8/6 SRM with novel winding distribution is proposed in this paper. The static torques generated by various magnetic circuits are analyzed and obtained to verify the torque increase. Then the electromagnetic characteristics of the proposed SRM are investigated by the numerical calculation method in detail, including flux linkage, inductance, and torque. Finally, an experiment for measuring the SRM static electromagnetic characteristics and dynamic performance is designed and performed based on the novel mode, and the comparing results show that the proposed two-phase SRM is effective.
The State of the Art of Finite Element Analysis in Mechanical Clinching
Yue Zhang,Honghe Xu,Ruitao Peng,Yan Lu,Linwei Zhu 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.4
Clinching technology is a mechanical connection technology that is applied to connect metal or non-metal sheet materials. It is widely used in different applications, such as automobile, aircraft, household appliances and other industries. In order to reduce weight, save energy, reduce fuel consumption, reduce pollution and curb global warming, lightweight structures with clinched joint are increasingly used in transportation. The finite element technology is popularized in engineering, so that it can get similar results with the test after investing less time, manpower, energy and material resources, which is conducive to the prediction and smooth progress of the test. A review of the finite element analysis of clinching technology is provided in the present paper. The article’s work also discusses the strength of the clinched joint, the factors influencing the clinched joint’s strength, the failure mechanism of the clinched joint, etc. Furthermore, the novel technologies of clinching as well as the finite element models and methods used in clinching, are introduced. The present paper’s main objective was to review the recent developments in the finite element analysis of clinching and provide a basis for further investigation in this area of research.
Hengjia Zhu,Jianming Pan,Jun Cao,Yue Ma,Fengxian Qiu,Wenli Zhang,Yongsheng Yan 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.49 No.-
Herein we reported a facile method to prepare porous ion/molecule imprinted polymers (I-MIPs) viatwice imprinting strategy for the simultaneous uptake of copper ions (Cu(II)) and l-cyhalothrin (LC). Firstly, N-(b-aminoethyl)-g-aminopropytrimethoxysilane (DAMO) was grafted on silica particles surfaceto synthesis Cu(II)-imprinted polymers to introduce iron imprinted sites. They were then utilized asstabilizers to prepare a stable W/O Pickering HIPEs template (LC as the imprinting molecule), which wasthen polymerized with dual imprinting sites including Cu(II) and LC. The adsorption equilibrium, kineticresults and selective recognition experiments were exhibited their prospected dual selectivity andsimultaneous removal of LC and Cu(II).
Yueying Zhu,Chuantian Yang,Yuan Yue,Chengwen Zhao,Yan Zhang 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.6
Two-phase simultaneous excitation mode of the switched reluctance motor (SRM) has been shown to effectively improve the average torque output compared with traditional single-phase excitation mode. But the torque ripple of the two-phase excitation SRM with traditional winding distribution increases because of the inconsistent electromagnetic field. To reduce the torque ripple, a two-phase excitation 8/6 SRM with novel winding distribution is proposed in this paper. The static torques generated by various magnetic circuits are analyzed and obtained to verify the torque increase. Then the electromagnetic characteristics of the proposed SRM are investigated by the numerical calculation method in detail, including flux linkage, inductance, and torque. Finally, an experiment for measuring the SRM static electromagnetic characteristics and dynamic performance is designed and performed based on the novel mode, and the comparing results show that the proposed two-phase SRM is effective.
Genetic Diversity for Rice Blast Management
(You Yong Zhu),(Hai Ru Chen),(Yun Yue Wang),(Zuos Hea Li),(Yan Li),(Jing Hua Fan),(Jian Bing Chen),(Jin Xiang Fan),(Shi Sheng Yang),(Guang Liang Ma),(Ling Ping Hu),(Jin Yu Zou),(Christopher C . Mundt) 한국균학회 2001 Proceedings of the Fifth Korea-China Joint Symposi Vol.- No.-
Xiao-Dan Yue,Jing-Yu Wang,Xin-Rong Zhang,Ju-Hong Yang,Chun-Yan Shan,Miao-Yan Zheng,Hui-Zhu Ren,Yi Zhang,Shao-Hua Yang,Zhen-Hong Guo,Bai Chang,Bao-Cheng Chang 대한의학회 2017 Journal of Korean medical science Vol.32 No.4
Sodium glucose co-transporter 2 (SGLT-2) inhibitors are newly developed but promising medicine for type 2 diabetes. However, patients with a different renal threshold for glucose excretion (RTG) may have a different reaction to this medicine. Therefore, the objective of this study was to investigate the characteristics of RTG and its impact factors in patients with type 2 diabetes mellitus (T2DM). The clinical and laboratory data of 36 healthy individuals and 168 in-hospital patients with T2DM were collected and analyzed, RTG was calculated using blood glucose (BG) measured by dynamic BG monitoring, urinary glucose excretion (UGE) and estimated glomerular filtration rate (eGFR). The characteristics of RTG were investigated. The risk factors for high RTG were analyzed using non-conditional logistic regression analysis. Our results found that RTG of the T2DM group was higher than that of the healthy individuals (P < 0.05); and 22.22% from the healthy individuals group but 58.33% from the T2DM group had high RTG. Age, duration of diabetes, body mass index (BMI), and homeostasis model assessment insulin resistance index (HOMA-IR) were independently associated with high RTG (P < 0.05). Further stratified analysis revealed that RTG in T2DM patients increased with age, duration of diabetes, and BMI. In conclusion, RTG is increased in patients with T2DM, especially in those with longer diabetic duration, higher BMI, and those who are older. Therefore, these patients may be more sensitive to SGLT-2 inhibitors.
Qin-Yi Wu,Yue-Yan Zhu,Cheng-Gang Zou,Ying-Qian Kang,Lian-Ming Liang 한국미생물학회 2016 The journal of microbiology Vol.54 No.11
Turgor is very important for the invasive growth of fungal pathogens. Glycerol, a highly osmotic solvent, is considered to play an important role in turgor generation. The nematophagous fungus Arthrobotrys oligospora mainly lives as a saprophyte. In the presence of nematodes, A. oligospora enters the parasitic stage by forming three-dimensional networks (traps) to capture nematodes. In A. oligospora, we found that glycerol accumulated during nematode-induced trap formation. We demonstrated that deleting gph1, which encodes glycogen phosphorylase, decreased the glycerol content, compared with that of a wild-type strain. Although the number of traps induced by nematodes was not affected in the Δgph1 mutant, the capture rate was lower. Meanwhile, deleting gph1 also affected the growth rate and conidiation capacity of the fungus. These results indicate that glycerol derived from GPH1 is essential for the full virulence of A. oligospora against nematodes.
Liu, Jia,Ge, Yang-Yang,Zhu, Hong-Cheng,Yang, Xi,Cai, Jing,Zhang, Chi,Lu, Jing,Zhan, Liang-Liang,Qin, Qin,Yang, Yan,Yang, Yue-Hua,Zhang, Hao,Chen, Xiao-Chen,Liu, Zhe-Ming,Ma, Jian-Xin,Cheng, Hong-Yan,S Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.16
Radiation therapy is an important treatment for head and neck squamous cell carcinoma (HNSCC). However, how to promote radiation sensitivity in HNSCC remains a challenge. This study aimed to investigate the radiosensitizing effects of fenofibrate on HNSCC and explore the underlying mechanisms. HNSCC cell lines CNE-2 and KB were subjected to ionizing radiation (IR), in the presence or absence of fenofibrate treatment. Cell growth and survival, apoptosis and cell cycle were evaluated. In addition, CNE-2 cells were xenografted into nude mice and subjected to IR and/or fenofibrate treatment. The expression of cyclinB and CDK1 was detected by Western blotting. Our results showed that fenofibrate efficiently radiosensitized HNSCC cells and xenografts in mice, and induced apoptosis and G2/M arrest via reducing the activity of the CDK1/cyclinB1 kinase complex. These data suggest that fenofibrate could be a promising radiosensitizer for HNSCC radiotherapy.