Results 241 to 250 of about 15,802,205 (308)

Mechanical response analysis of tunnels crossing reverse faults under non-uniform seismic inputs. [PDF]

Sci Rep
Yang Y, Li X, Liu J, Chen S.
europepmc   +1 more source

Stress-Adaptive Biomaterials With Tunable Yielding Architectures Regulate Organoid Morphogenesis. [PDF]

Small
Reeves JPW, Rostami S, Rammal M, Bocan A, Lépine P, Harrington MJ, Durcan TM, Moraes C.   +7 more
europepmc   +1 more source

Biomimetic Design and Mechanical Properties of Additively Manufactured Titanium Alloy Implant with Gradient Gyroid Structure. [PDF]

Materials (Basel)
Li R, Tian C, Wu Z, Lu Y.
europepmc   +1 more source

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An improved time-varying mesh stiffness model for helical gear pairs considering axial mesh force component

Mechanical Systems and Signal Processing, 2018
Abstract An improved time-varying mesh stiffness (TVMS) model of a helical gear pair is proposed, in which the total mesh stiffness contains not only the common transverse tooth bending stiffness, transverse tooth shear stiffness, transverse tooth radial compressive stiffness, transverse gear foundation stiffness and Hertzian contact stiffness, but ...
Qibin Wang, Bo Zhao, Yang Fu, Xianguang Kong, Hui Ma   +4 more
semanticscholar   +4 more sources

Vibration response and fault characteristics analysis of gear based on time-varying mesh stiffness

Mechanism and Machine Theory, 2020
Gears are prone to failures, which are difficult to detect in the early stage. In this study, the time-varying mesh stiffness of gears teeth with different crack lengths is calculated, and the effects of spalling with different widths, lengths, and ...
Zong Meng, Gui-Xia Shi, Fulin Wang
semanticscholar   +3 more sources

Time-varying mesh stiffness calculation of cracked spur gears

Engineering Failure Analysis, 2014
Abstract Considering the misalignment of gear root circle and base circle and accurate transition curve, an improved mesh stiffness model for a healthy gear pair is proposed and validated by the finite element method (FEM). Based on the improved method, three mesh stiffness calculation methods (method 1: straight lines for crack path and limiting ...
Hui Ma, Rongze Song, Xu Pang, Bangchun Wen   +3 more
openaire   +3 more sources

A study of effects of tooth surface wear on time-varying mesh stiffness of external spur gear considering wear evolution process

Mechanism and Machine Theory, 2021
Gear meshing surfaces are readily exposed to wear due to inadequate lubrication and long-time operation. Accumulative wear causes variations of gear tooth profile, resulting in variations of gear tooth's mesh stiffness and gear system's dynamic ...
Wei Chen, Y. Lei, Yao Fu, Li-Guo Hou
semanticscholar   +3 more sources

Calculation of Time-Varying Mesh Stiffness Affected by Load Based on FEM

Volume 10: 2017 ASME International Power Transmission and Gearing Conference, 2017
Time-varying mesh stiffness (TVMS) is a key component of gear transmission system for gear dynamic response. When the machine starts working, stop working or goes into an unstable working condition, the load will be varying. In order to investigate the impact of different loads on TVMS, a numerical method based on FEM is proposed in this paper to study
Qian Cheng, Yimin Shao, Jing Liu, Lei Yin, Minggang Du, Yang Yang   +5 more
openaire   +2 more sources

Improved time-varying mesh stiffness model of cracked spur gears

Engineering Failure Analysis, 2015
Abstract Based on our previous work (Ma et al., 2014, Engineering Failure Analysis , 44, 179–194), this paper presents an improved analytical model (IAM) for the time-varying mesh stiffness (TVMS) calculation of cracked spur gears. In the improved analytical model, the calculation error of TVMS under double-tooth engagement due to repeatedly ...
Hui Ma, Xu Pang, Ranjiao Feng, Jin Zeng, Bangchun Wen   +4 more
openaire   +3 more sources

A probability distribution model of tooth pits for evaluating time-varying mesh stiffness of pitting gears

Mechanical Systems and Signal Processing, 2018
Tooth damage often causes a reduction in gear mesh stiffness. Thus time-varying mesh stiffness (TVMS) can be treated as an indication of gear health conditions.
Ya-Guo Lei, Zong-Yao Liu, Delong Wang, Xiao Yang, Huan Liu, Jing Lin   +5 more
semanticscholar   +3 more sources