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您的检索式：作者名="Chengxiong Lin"
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| 1 | Finite-element modelling of frictional behaviour between oesophagus and endoscope显示文摘The endoscopy is the most direct and effective means for digestive tract diseases.Medical workers can conduct a series of manipulations with the help of endoscope,including checking,removing,stripping the diseased tissue or placing the stent.In order to understand the frictional behaviour at the endoscope-oesophagus interface,the finite-element model was analysed by Abaqus in this study.Considering the different modelling conditions,the total force due to frictional stress,frictional dissipation and the maximum Mises stress for the whole model were studied.Results showed that with the increasing amplitude,coefficient of friction and decreasing diameter,the total forces due to the frictional stress and the FD increased obviously.It did not present a clear difference with the variable distance for overlapping parts(region L).The positions of maximum Mises stress for the whole model under different conditions mainly focused on the initial part of the region R.The maximum Mises stress between different diameters showed a big difference.The results can provide the basic data for the finite-element modelling of frictional behaviour of human tissue. | Chengxiong Lin Pan Ren Wei Li Hengyi Deng Zhongrong Zhou | 2020 | Biosurface and Biotribology2020，6，3： | 0 |
| 2 | Measuring the micromechanical properties of oesophageal mucosa with atomic force microscopy显示文摘The micromechanical properties of soft tissue can be used as markers for the physiological state and function of the tissue.Deep understanding of the micromechanics of soft tissue,such as the oesophagus,is of great significance to the design of artificial oesophagi,endoscope materials and coatings for medical devices.Here,the micromechanical properties of oesophageal mucosa were studied under different loading rates,deflections,and dwell time by using atomic force microscopy.The micromechanical properties of soft tissue included elastic modulus,plasticity and adhesion force.Results showed that the micromechanical properties changed with increasing loading rate,deflection and dwell time.The micromechanical properties of oesophageal mucosa were related to time-dependent behaviours,such as contact stress,energy transformation,and strain gradient plasticity.Furthermore,the heterogeneity of oesophageal mucosa affected the micromechanical properties.The force mapping mode was a reliable and effective means to study the micromechanical properties of soft tissue.The results can provide a basis and technical support for the diagnosis of oesophageal diseases from a microscale as well as a material design perspective. | Chengxiong Lin Jingyang Xie Wei Li | 2020 | Biosurface and Biotribology2020，6，4： | 0 |
| 3 | Revealing the Local Microstates of Fe–Mn–Al Medium Entropy Alloy:A Comprehensive First-principles Study显示文摘Entropy-stabilized multi-component alloys have been considered to be prospective structural materials attributing to their impressive mechanical and functional properties.The local chemical complexions,microstates and configurational transformations are essential to reveal the structure–property relationship,thus,to promote the development of advanced multicomponent alloys.In the present work,effects of local lattice distortion(LLD)and microstates of various configurations on the equilibrium volume(V0),total energy,Fermi energy,magnetic moment(μMag)and electron work function(Φ)and bonding structures of the Fe–Mn–Al medium entropy alloy(MEA)have been investigated comprehensively by first-principles calculations.It is found that theΦandμMag of those MEA are proportional to the V 0,which is dominated by lattice distortion.In terms of bonding charge density,both the strengthened clusters or the so-called short-range order structures and the weakly bonded spots or weak spots are characterized.While the presence of weakly bonded Al atoms implies a large LLD/mismatch,the Fe–Mn bonding pairs result in the formation of strengthened clusters,which dominate the local microstates and the configurational transitions.The variations ofμMag are associated with the enhancement of the nearest neighbor magnetic Fe and Mn atoms,attributing to the LLD caused by Al atoms,the local changes in the electronic structures.This work provides an atomic and electronic insight into the microstate-dominated solid-solution strengthening mechanism of Fe–Mn–Al MEA. | Ying Zhang William Yi Wang Chengxiong Zou Rui Bai Yidong Wu Deye lin Jun Wang Xidong Hui Xiubing Liang Jinshan Li | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，11： | 0 |
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