Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Publication
- File Type
Articles 1 - 6 of 6
Full-Text Articles in Entire DC Network
Drop Weight Testing On Sandwich Panels With A Novel Thermoplastic Core Material, Christopher Tuan
Drop Weight Testing On Sandwich Panels With A Novel Thermoplastic Core Material, Christopher Tuan
Christopher Y. Tuan
A series of drop weight tests were conducted to evaluate the dynamic flatwise compression strength and flexural strength of sandwich panels with a novel core structure. This sandwich core material, known as Norcore, consists of interconnected cells in a unique configuration of truncated pyramid with sloping cell walls. Core materials made of thermoplastic including virgin Lexan, polycarbonate, polycarbonate regrind, high impact polystyrene, and acrylonitrile butadiene styrene were tested. The test results showed that these sandwich panels have good strength as well as energy absorption capacities.
Drop Weight Testing On Sandwich Panels With A Novel Thermoplastic Core Material, Christopher Y. Tuan
Drop Weight Testing On Sandwich Panels With A Novel Thermoplastic Core Material, Christopher Y. Tuan
Christopher Y. Tuan
A series of drop weight tests were conducted to evaluate the dynamic flatwise compression strength and flexural strength of sandwich panels with a novel core structure. This sandwich core material, known as Norcore, consists of interconnected cells in a unique configuration of truncated pyramid with sloping cell walls. Core materials made of thermoplastic including virgin Lexan, polycarbonate, polycarbonate regrind, high-impact polystyrene, and acrylonitrile butadiene styrene were tested. The test results showed that these sandwich panels have good strength as well as energy absorption capacities.
Impact Mechanics And High-Energy Absorbing Materials: Review, Pizhong Qiao, Mijia Yang, Florin Bobaru
Impact Mechanics And High-Energy Absorbing Materials: Review, Pizhong Qiao, Mijia Yang, Florin Bobaru
Florin Bobaru Ph.D.
In this paper a review of impact mechanics and high-energy absorbing materials is presented. We review different theoretical models (rigid-body dynamics, elastic, shock, and plastic wave propagation, and nonclassical or nonlocal models. and computational methods (finite-element, finite-difference, and mesh-free methods. used in impact mechanics. Some recent developments in numerical simulation of impact (e.g., peridynamics) and new design concepts proposed as high energy absorbing materials (lattice and truss structures, hybrid sandwich composites, metal foams, magnetorheological fluids, porous shape memory alloys. are discussed. Recent studies on experimental evaluation and constitutive modeling of strain rate-dependent polymer matrix composites are also presented. Impact damage …
Low-Field Dependence Of The Microwave-Absorption In Superconducting Yba₂Cu₃O₇₋ₓ Near Tc, R. Karim, S. A. Oliver, C. Vittoria, A. Widom, G. Balestrino, S. Barbanera, P. Paroli
Low-Field Dependence Of The Microwave-Absorption In Superconducting Yba₂Cu₃O₇₋ₓ Near Tc, R. Karim, S. A. Oliver, C. Vittoria, A. Widom, G. Balestrino, S. Barbanera, P. Paroli
Carmine Vittoria
Novel microwave absorption and dispersion measurements have been performed on polycrystalline samples and well-characterized single-crystal platelets of high-Tc superconductors YBa₂Cu₃O₇₋ₓ. The results are explained in terms of fluxoids and rapid variation of the penetration depth near and below Tc. The microwave absorption increases as a function of the magnetic field as a result of increase in the surface area of the normal-conducting region. By applying a modulating field in a particular manner and from thermodynamic considerations there are strong indications of energy absorption by fluxoids.
Investigations Of Static And Dynamic Performance Of Railway Prestressed Concrete Sleepers, S. Kaewunruen, Alexander Remennikov
Investigations Of Static And Dynamic Performance Of Railway Prestressed Concrete Sleepers, S. Kaewunruen, Alexander Remennikov
Alex Remennikov
Ever increasing axle loads and train speeds are pressing track owners to extract as much performance as possible from their asset without wholesale or catastrophic failure. Unfortunately, there is insufficient knowledge of the static and dynamic loadings that a track may be subjected to in its lifetime, and there is widespread suspicion that track components have reserves of strength that are untapped, especially concrete sleepers. Addressing these issues has the potential for substantial savings for track owners. It's important therefore to ascertain the spectrum and amplitudes of forces applied to tracks, to understand more clearly the manner in which track …
Experimental Determination Of Energy Absorption Capacity For Prestressed Concrete Sleepers Under Impact Loads, Alexander Remennikov, Sakdirat Kaewunruen
Experimental Determination Of Energy Absorption Capacity For Prestressed Concrete Sleepers Under Impact Loads, Alexander Remennikov, Sakdirat Kaewunruen
Alex Remennikov
Extreme loading conditions on railway tracks may include dynamic impact loads with very high magnitude but short duration. These loading conditions are caused by wheel or rail abnormalities such as flat wheels, dipped rails, etc. A high-capacity drop weight impact testing machine was constructed at the University of Wollongong, in order to evaluate the ultimate capacity of prestressed concrete sleepers under impact loads. This paper presents the experimental investigations to evaluate failure modes, flexural toughness, and energy absorption mechanisms for railway prestressed concrete sleepers under static and impact loadings. Energy absorption capacity of the prestressed concrete sleepers was also evaluated …