Results 121 to 130 of about 24,545 (231)
, 2006 We calculate the P-shell--to-S-shell decay lifetime \tau(P->S) of electrons in lens-shaped self-assembled (In,Ga)As/GaAs dots due to Auger electron-hole scattering within an atomistic pseudopotential-based approach. We find that this relaxation mechanism
Al. L. Efros +8 more
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Importance of the model selection for processing dynamic three-point bending tests [PDF]
, 2010 International audienceThe Split-Hopkinson Pressure Bar apparatus remains the standard test to investigate high strain rate materials properties. To determine the tensile strength of quasi-brittle materials three-point bending tests are frequently ...
Delvare, Franck +3 more
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Measuring the spatial and temporal pressure variation from buried charges [PDF]
, 2014 The effect of changing geotechnical parameters on the impulse generated from a shallow buried charge has been the topic of a large amount of scientific interest in recent years.
Bennett, T. +7 more
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Signal Correction for the Split-Hopkinson Bar Testing of Soft Materials
DynamicsThe Split-Hopkinson pressure bar (SHPB) test is a commonly accepted experiment to investigate the material behavior under high strain rates. Due to the low impedance of soft materials, here, the test has to be performed with plastic bars instead of metal
Sören Bieler, Kerstin Weinberg
doaj +1 more source
High Strain Rate Response of Adhesively Bonded Fiber-Reinforced Composite Joints A Computational Study to Guide Experimental Design [PDF]
Adhesively bonded carbon fiber-reinforced epoxy composite laminates are widely used in aerospace applications. During a high energy impact event, these laminates are often subjected to high strain rate loading.
Justusson, Brian +5 more
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Solitonic State in Microscopic Dynamic Failures
, 2018 Onset of permanent deformation in crystalline materials under a sharp indenter tip is accompanied by nucleation and propagation of defects. By measuring the spatio-temporal strain field nearthe indenter tip during indentation tests, we demonstrate that ...
Ghaffari, H. O. +2 more
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Effect of projectile head style on high gacceleration waveform of Hopkinson bar calibration system
Journal of Measurement Science and Instrumentation, 2015 The freestyle Hopkinson bar is a kind of main high g loading equipment utilized widely in calibration of high g accelerometer and other high shock conditions.The calibration experiment of accelerometer was conducted.With one-dimension stress wave theory ...
XU Peng +1 more
doaj
An analytical and experimental study of the behavior of semi-infinite metal targets under hypervelocity impact [PDF]
The material strength and strain rate effects associated with the hypervelocity impact problem were considered. A yield criterion involving the second and third invariants of the stress deviator and a strain rate sensitive constitutive equation were ...
Chakrapani, B., Rand, J. L.
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Pedestrian Amenity: On Street Survey Design [PDF]
, 1987 Any new road, road improvement or traffic management scheme could affect pedestrian journeys in its locality or elsewhere. Some journeys may be affected directly, with severance caused where the new road or road improvement cuts across a pedestrian ...
Hopkinson, P.G., May, A.D., Turvey, I.G.
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