Results 51 to 60 of about 594,528 (216)
Deep Underground Science and Engineering, EarlyView.This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu +8 more
wiley +1 more source
A review of Pochhammer–Chree dispersion in the Hopkinson bar [PDF]
Proceedings of the Institution of Civil Engineers - Engineering and Computational Mechanics, 2018 This paper presents a detailed review of the current state of the art in Hopkinson pressure bar (HPB) data analysis. In particular, the underlying theory of the HPB is discussed, and methods of correcting signals for Pochhammer–Chree dispersion and other associated effects are described.
Sam E. Rigby +2 more
openaire +1 more source
OBTENCIÓN DE CURVAS Ɛ-T DE ALUMINIO PLEGADO MEDIANTE UN SISTEMA BARRA DE HOPKINSON (OBTAINING CURVES Ɛ-T OF FOLDED ALUMINUM BY MEANS OF A HOPKINSON BAR SYSTEM) [PDF]
, 2018 Un Sistema Barra de Hopkinson fue utilizado para medir altas tazas de deformación a compresión de aluminio plegado. Para ello se seleccionó un material adecuado para las barras del Sistema de Hopkinson que fuera cercano a la impedancia del material a ...
Orozco Mendoza, Horacio +2 more
core +2 more sources
What Future Lies Ahead for Circular Business Models Research?
Strategic Change, EarlyView.ABSTRACT The circular economy—wherein waste is designed out, materials are circulated and nature is regenerated—has reached global recognition. From policy to business circles, it is seen as a viable strategy to address multiple societal grand challenges—including climate change and depletion of finite natural resources—and build a more resilient ...
Roberta de Angelis, Kerry Hudson
wiley +1 more source
EPJ Web of Conferences, 2018 The design of sample geometries and the measurement of small strains are considered the main challenges when testing composite materials at high strain rates using the split Hopkinson bar technique. The aim of this paper is to assess two types of tensile
Elmahdy Ahmed, Verleysen Patricia
doaj +1 more source
Polymer Composites, EarlyView.Ballistic tests using a novel composite configuraion. ABSTRACT Aramid fibers are extensively utilized in personal protective equipment owing to their lightweight and superior properties. This study proposes a novel composite structure comprising aramid fabric, EVA hotmelt films, and graphene‐clay nanostructured HDPE laminate, totalizing 20 repeated ...
Vagner Grison +8 more
wiley +1 more source
Pest Management Science, EarlyView.The Bemisia tabaci MEAM1 strain GR15‐1R shows partial resistance to neonicotinoids (bottom), which correlates with an increased expression of the P450 gene CYP6CM1 compared to the insecticide‐susceptible strain SU07‐1 (top). Abstract BACKGROUND Bemisia tabaci MEAM1 is a highly invasive and polyphagous pest species of agricultural and horticultural ...
Cao (Grace) Fang +5 more
wiley +1 more source
A New Specimen Geometry for Compression Hopkinson Bars [PDF]
Le Journal de Physique IV, 1997 This work is concerned with experimental characterization of materials with compression Hopkinson bars. First we point out the importance of friction, elastic punching and parasitic bending on the results of static compression tests with standard cylindrical specimens.
Deltort, B., Nême, Alain, Tanguy, B.
openaire +2 more sources
Correction Procedure of Wave Signals for a Viscoelastic Split Hopkinson Pressure Bar [PDF]
Problemy Mechatroniki, 2016 A polymeric split Hopkinson pressure bar technique (SHPB) is preferred for testing materials with low mechanical impedance. However, the use of polymeric bars requires additional analysis for data reduction, temperature complications and additional ...
Jacek JANISZEWSKI +2 more
doaj +1 more source
Development and validation of a Hopkinson bar for hazardous materials [PDF]
, 2020 Background: There are a variety of approaches that can be employed for Hopkinson bar compression testing and there is no standard procedure. Objectives: A Split-Hopkinson pressure bar (SHPB) testing technique is presented which has been specifically ...
Hooper, Paul +7 more
core +1 more source