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Long Zhang
The maximum contact force is one of the most important indicators for contact problems. In this paper, the configuration optimization is conducted to reduce the maximum contact force for a free-floating space robot capturing tumbling target. First, the d...
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Yanjie Zhao, Guanci Chen, Wenbin Zhang and Yinke Ding
The traditional slewing bearing with circular raceway has the problem of stress concentration under the large overturning moment. In this paper, a new non-circular raceway of a slewing ball bearing was presented to conquer this problem. To obtain the new...
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Xianmai Chen, Nan Chen, Zilong Wei, Xiangmin Zhang, Fei Yang, Hongjun Zhao, Mingxi You and Weidong Wang
The load generated during train operation is transmitted to sleepers through rails, and then from sleepers to trackbeds. As one of the important components of the track structure, sleepers are very important to the service-life and safety of railways. Th...
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Qin Liu, Zhe Wang, Ning Zhang, Hongyu Zhao, Lei Liu, Kunpeng Huang and Xuguang Chen
The local scour around offshore pile foundations often seriously affects the normal operation of offshore wind power. The most widely used numerical simulation method in the study of local scour is the Euler two-fluid model (TFM). However, the contact ef...
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Jianmin Qiu, Ying Yang, Xin Hong, Piotr Vasiljev, Dalius Mazeika and Sergejus Borodinas
This paper presents a disc-type ultrasonic piezoelectric motor, which is designed for micro flying vehicles. It provides a high output rotation speed under low operating voltage, compared with common piezoelectric devices, by employing a ?contact teeth? ...
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Qimin Gao, Lei Cheng, Renbing Wang, Mingjiang Chen, Weisong Zhao, Jingjing Fu and Zhenwei Wang
The mechanical properties of tomato stalk, relevant to the harvesting and crushing of tomato vines, significantly impact its harvesting quality and efficiency. Establishing a simulation model, which accurately mirrors these properties, is foundational fo...
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Prabhath L. Gamage, Chinthaka M. Udamulle Gedara, Ruwan Gunawardhana, Chandima Bulumulla, Ziyuan Ma, Ashutosh Shrivastava, Michael C. Biewer and Mihaela C. Stefan
The structural alteration of semiconducting polymer backbones can improve the optoelectronic properties of organic semiconductors and enhance field-effect mobilities. In our efforts towards improving the performance of organic field-effect transistors (O...
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Jicheng Huang, Kunpeng Tian, Aimin Ji, Bin Zhang, Cheng Shen and Haolu Liu
Finite element numerical simulations provide a visual and quantitative approach to studying the interaction between rigid mechanical components and flexible agricultural crops. This method is an important tool for the design of modern agricultural produc...
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Yujing Jiang, Meng Li, Hengjie Luan, Yichen Shi, Sunhao Zhang, Peng Yan and Baocheng Li
Under the action of dynamic loadings such as earthquakes and volcanic activities, the mechanical properties of gas-hydrate-bearing sediments will deteriorate, leading to a decrease in the stability of hydrate reservoirs and even inducing geological disas...
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Yanbin Wang, Deli Gao and Chenyu Meng
It is important to accurately assess the interaction between the conductor and the soil to ensure the stability of the subsea wellheads during deepwater drilling. In this paper, numerical simulations were carried out to study the lateral dynamic bearing ...
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Guojun Wang, Qianjin Yue, Dayong Zhang, Yanghua Fu, Xin Peng and Rui Dong
When sea ice acts on vertical structures, there are much higher pressures in localized areas known as high-pressure zones (HPZs) than in other areas. The damage failure mode of sea ice varies with the sea ice velocity and affects the distribution of HPZs...
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Hiba Khalid Hussein,Israa Rafie Shareef,Iman Ahmed Zayer
Pág. 57 - 64
The Resistance Spot Welding (RSW) represents one of the most important welding processes. The resistance spot welding quality depends on the process parameters like welding current, electrode force and welding time and their chosen levels. In this work, ...
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Wanzhi Zhang, Yunzhen Qu, Xiubo Yin, Hongjuan Liu, Guizhi Mu and Dengshan Li
Sweet potato skin is prone to friction damage during mechanical harvesting. To reveal the friction damage mechanism of sweet potato skin, the impact friction process between a sweet potato and a rod was theoretically analyzed. The main factors affecting ...
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Jinpeng Hu, Lizhang Xu, Yang Yu, Jin Lu, Dianlei Han, Xiaoyu Chai, Qinhao Wu and Linjun Zhu
Aimed at addressing the problems of the existing straw choppers on combine harvesters, such as a large cutting resistance and poor cutting effect, combined with bionic engineering technology and biological characteristics, a bionic model was used to extr...
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Qingteng Yuan, Ming Xiao, Ci Kong and Kaicheng Wang
The foundation of a seismic safety assessment of cross-fault hydraulic tunnels is an acceptable and accurate seismic response. A dynamic contact force algorithm that may take into consideration the interaction between the fault?surrounding rock?lining st...
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Antonio Rosales and Tapio Heikkilä
Robots executing contact tasks are essential in a wide range of industrial processes such as polishing, welding, debugging, drilling, etc. Force control is indispensable in these type of tasks since it is required to keep the interaction force (between t...
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Xuepeng Liu, Shiping He and Jianhua Zheng
Deep-sea pressure vessels are specialized pressure vessels designed for automatic deployment from underwater to the surface. These vessels find extensive applications in underwater life-saving and transportation. Their interiors are furnished with a pair...
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Gaoming Yan and Boming Zhao
Tunnels, where they pass through soft-hard strata, are severely damaged during earthquakes. These issues have not yet been well understood. In this study, the seismic performances of a tunnel passing through soft-hard stratum with a transition tunnel and...
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Shujin Qiu, Yao Yu, Yu Feng, Zhong Tang, Qingliang Cui and Xiangyang Yuan
Sorghum is an important grain crop in many countries worldwide, yet it often suffers from high levels of fragmentation during harvest due to varying maturity. To this end, a study was conducted to investigate the crushing characteristics of sorghum grain...
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Faham Tahmasebinia, Linda Zhang, Sangwoo Park and Samad Sepasgozar
Reinforced concrete (RC) members in critical structures, such as bridge piers, high-rise buildings, and offshore facilities, are vulnerable to impact loads throughout their service life. For example, vehicle collisions, accidental loading, or unpredicted...
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