THE MECHANICAL behavior of brittle matrix composites is strongly affected by the bridging of cracks by fibers. In random fiber composites, libers can lie at an angle to the crack plane. Under such conditions, the bridging stress for a certain crack opening is governed by various micromcchanisms including fiber debonding, fiber bending and rupture as well as matrix spailing. While fiber debondin...

We introduce spectral AMGe (ρAMGe), a new algebraic multigrid method for solving systems of algebraic equations that arise in Ritz-type finite element discretizations of partial differential equations. The method requires access to the element stiffness matrices, which enables accurate approximation of algebraically “smooth” vectors (i.e., error components that relaxation cannot effectively eli...

1 Department of Civil Engineering, Faculty of Engineering, Prince of Songkla University, Songkhla 90112, Thailand 2 Civil Engineering Program, School of Engineering, University of Phayao, Phayao 5600, Thailand 3Department of Civil Engineering, ERI, Gyeongsang National University, Jinju 660-701, Republic of Korea 4Department of Civil Engineering, Gangneung-Wonju National University, Gangneung 21...

The paper deals with the stochastic analysis of a single-degree-of-freedom vehicle moving at constant velocity along a simple track structure with randomly varying support stiffness. The track is modelled as an infinite Bernoulli-Euler beam resting on a Kelvin foundation, which has been modified by the introduction of a shear layer. The vertical spring stiffness in the support is assumed to be ...

1. Abstract Currently, wind turbine towers are being built to increasing heights in order to tap into higher and more consistent winds available at these heights. Additionally, increasingly large wind turbines are being deployed atop these towers in order to capture more energy. This trend of larger turbines being deployed at greater heights makes obtaining the most efficient and safe, or optim...

In this study, the seismic response of shallow foundations resting on a liquefiable soil layer is modeled using coupled smoothed particle hydrodynamics (SPH)-discrete element method (DEM) scheme. framework, deposit represented by an assembly DEM particles and fluid domain lumped into set SPH carrying local properties. The averaged forms Navier-Stokes equations dictate motion fluid-particle mixt...

Planetary surface vehicles (PSVs) play a critical role in space explorations. Flexible-wheel (FW) suspension concept has been regarded to be one of the novel technologies for future PSVs, where a few experimental studies have demonstrated its potential benefits in improving tractive performance of PSVs. This study develops generalized models for fundamental stiffness and damping properties and ...

The upper structure of high piled wharf in coastal soft soil area is loaded by waves or ships, which transferred to the foundation through pile foundation. force small and lasts for a long time, causes strength saturated clay vibration range decrease slowly, weakening effect gradually accumulates, resulting horizontal displacement In this paper, maximum residual are deduced calculated analytica...

Offshore wind turbines (OWTs) are dynamically loaded structures and therefore the estimation of the natural frequency is an important design calculation to avoid resonance and resonance related effects (such as fatigue). Monopiles are currently the most used foundation type and are also being considered in deeper waters (430 m) where a stiff transition piece will join the monopile and the taper...