Results 21 to 30 of about 11,796,944 (252)

Fatigue Crack Propagation Study of Bridge Steel Q345qD Based on XFEM Considering the Influence of the Stress Ratio

open access: yesApplied Sciences, 2022
In the past, fatigue cracks have appeared in the orthotropic steel decks of bridges shortly after they opened to traffic. Previous studies have shown that high tensile welding residual stress exists in welded joints of steel bridges, which significantly ...
Baoya Cao   +4 more
doaj   +1 more source

Failure Behavior and Energy Storage and Release of Hard Coal under Different Static and Dynamic Loading States

open access: yesAdvances in Civil Engineering, 2020
The study of the energy accumulation and rate of release in hard coal under dynamic, static, and coupled dynamic-static loading and its failure mode is of significance when studying the mechanism underpinning coal mine dynamic disasters such as rock ...
XianJie Hao   +4 more
doaj   +1 more source

A new model for the energy release rate of fibre/matrix interfacial fracture

open access: yes, 1998
On the basis of the well-known shear-lag analysis of fibre/matrix interface stresses and the assumption of identical axial strains in the fibre and matrix, a new model for predicting the energy release rate of interfacial fracture of the fibre pull-out ...
张双寅   +1 more
core   +1 more source

Effects of HfC Particles on Crack Initiation and Propagation Behavior of WC/Co Composites

open access: yesXibei Gongye Daxue Xuebao, 2019
Tungsten carbide composites were prepared by cold-pressing and hot-pressing sintering; fracture toughness and bending strength of the specimens were tested. The microstructures of HfC/WC/Co composites were observed with the SEM.

doaj   +1 more source

Nanobeams with Internal Discontinuities: A Local/Nonlocal Approach

open access: yesNanomaterials, 2021
The aim of the present work is to extend the two-phase local/nonlocal stress-driven integral model (SDM) to the case of nanobeams with internal discontinuities: as a matter of fact, the original formulation avoids the presence of any discontinuities ...
Daniela Scorza   +2 more
doaj   +1 more source

Debonding and cracking energy release rate of the fiber/matrix interface

open access: yes, 1998
An investigation of fiber/matrix interfacial fracture energy is presented in this paper. Several existing theoretical expressions for the fracture energy of interfacial debonding are reviewed.
张双寅   +1 more
core   +1 more source

Demand-Controlled Ventilation Energy Savings for Air Handling Unit

open access: yes, 2021
Heat, cooling, and ventilation units are major energy consumers for commercial buildings, consuming as much as 50% of a building’s total annual power usage.
Razban, Ali   +2 more
core   +1 more source

Equilibrium states and stability of pre-tensioned adhesive tapes

open access: yesBeilstein Journal of Nanotechnology, 2014
In the present paper we propose a generalization of the model developed in Afferrante, L.; Carbone, G.; Demelio, G.; Pugno, N. Tribol. Lett. 2013, 52, 439–447 to take into account the effect of the pre-tension in the tape.
Carmine Putignano   +3 more
doaj   +1 more source

Analytical Solution for a 1D Hexagonal Quasicrystal Strip with Two Collinear Mode-III Cracks Perpendicular to the Strip Boundaries

open access: yesCrystals, 2023
We considered the problem of determining the singular elastic fields in a one-dimensional (1D) hexagonal quasicrystal strip containing two collinear cracks perpendicular to the strip boundaries under antiplane shear loading. The Fourier series method was
Jing Yu, Junhong Guo
doaj   +1 more source

Wood Welded Connections: Energy Release Rate Measurement [PDF]

open access: yes, 2008
The energy release rates of beech specimens bonded by linear friction welding were determined using double cantilever beam (DCB) tests. The analysis of the results was carried out with the experimental compliance method, which is based on the linear ...
Ganne-Chédeville, Christelle   +5 more
core   +1 more source

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