A multiscale modeling approach for the prediction of material stiffness of the ionic polymer Nafion is presented. Traditional rotational isomeric state theory is applied in combination with a Monte Carlo methodology to develop a simulation model of the conformation of Nafion polymer chains on a nanoscopic level from which a large number of end-to-end chain lengths are generated. The probability...

By analyzing the support of load-carrying rolling elements when fall into fault position, dynamics model a bearing variable stiffness system with local faults is proposed, considering retention factor contact deformation. Then, this paper researches change effective stiffness, deformation, force, and total elements. The results show that abruptly decreases position. deformation force in load zo...

Abstract: The remote center compliance (RCC) mechanism is of great use for practical designs, especially if a pure rotation about a virtual point is required. The analysis of compliance properties and rotational precision for RCC mechanisms are very important for mechanical design in applications where precision is required. This paper formulates an analytical method for the compliance and rota...

The article aims to find the buckling loads for pinned?rotationally restrained shallow circular arches in terms of rotational end stiffness, geometry and material distribution. loading is a concentrated vertical force placed at crown. A geometrically nonlinear model presented which relates not only axial but also bending moment membrane strain. load-strain relationship established between strai...

This paper investigates the static and dynamic characteristics of precision hydrostatic spindle with a mid-thrust bearing under different working conditions. Firstly, establishes fluid governing equations coupled journal thrust bearings based on orifice restrictors; Reynolds are solved using perturbation finite difference methods to obtain steady transient pressure distribution functions. Then ...

Slender, load-bearing masonry walls with slenderness ratios (h/t) greater than 30 are required to be designed as pinned-pinned elements per North American provisions for masonry, CSA S304-14 (2019) and TMS 402-16 (2016). This provision neglects the contribution of reactive stiffness foundation strength wall its effect on redistribution bending moments along height. Eight full-scale built differ...