Results 271 to 280 of about 1,454,923 (313)

Strain localization in polycarbonates deformed at high strain rates

Journal of Polymer Engineering, 2011
Abstract We studied three-dimensional transient large coupled thermomechanical deformations of a polycarbonate (PC) plate with a through-the-thickness inhomogeneity at its centroid. The PC exhibits strain softening followed by strain hardening and its elastic moduli are taken to be functions of strain rate and temperature. The inhomogeneity
Anoop G. Varghese, Romesh C. Batra
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Stress–Strain Behavior of SAC305 at High Strain Rates

Journal of Electronic Packaging, 2015
Electronic products are subjected to high G-levels during mechanical shock and vibration. Failure-modes include solder-joint failures, pad cratering, chip-cracking, copper trace fracture, and underfill fillet failures. The second-level interconnects may be experience high strain rates and accrue damage during repetitive exposure to mechanical shock ...
Pradeep Lall, Sandeep Shantaram, Jeff Suhling, David Locker   +3 more
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High Strain-Rate Compression Tests on Ice

The Journal of Physical Chemistry B, 1997
High-speed uniaxial compression tests were conducted in the strain-rate range 10-1−101 s-1, at −11 °C, on freshwater ice and “Baltic” sea ice of mean salinity 2.4 ± 0.7 ppt.
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Large Strain, High Strain Rate Testing of Copper

Journal of Engineering Materials and Technology, 1980
This paper describes the development of a high-speed torsional testing machine and results obtained on the strain-rate dependent strength of copper at large shear strains. Test techniques and data obtained are intended to be useful in applications such as ballistics and machining.
U. S. Lindholm, A. Nagy, G. R. Johnson, J. M. Hoegfeldt   +3 more
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High-Strain-Rate Loading

2014
The disk-shaped composite specimens with different compositions of MWCNTs were then subjected to high-strain-rate impact, and their dynamic impact loading behavior results were compared with variations in compositions of MWCNTs.
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Stress-Strain Properties of Plastics at High Strain Rates

Review of Scientific Instruments, 1966
Apparatus of the falling weight type previously developed for tensile testing of rubbers at strain rates up to 14.5 m/sec has been made stiffer and more sensitive to accommodate plastics. Loads up to 225 kg and resolution to about 50 μsec have been achieved using a piezoelectric transducer.
M. L. Dannis, R. E. Watling
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Strength of Metals and Alloys at High Strains and Strain Rates

1977
The effects of strain rate and strain-rate history on the strength of metals at high strains have been investigated in two series of tests at room temperature using the split Hopkinson-bar method to obtain shear strain rates up to 3000 s-1. In the first series, various materials were subjected to nearly constant low and high strain rates in torsion ...
J. D. Campbell, A. M. Eleiche, M. C. C. Tsao   +2 more
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Strain Rate History Effects and Dislocation Substructure at High Strain Rates

1983
A brief review is presented of strain rate history and temperature history effects during the high strain rate deformation of metals with special emphasis on the BCC metals. Possible explanations to account for history effects are reviewed. Experiments are described in which single crystals of aluminum are deformed at various strain rates. Observations
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Rate sensitivity of copper at large strains and high strain rates

2021
J.R. Klepaczko, M. Zenasni
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High-Rate Formability of High-Strength Aluminum Alloys: A Study on Objectivity of Measured Strain and Strain Rate

2015
Aluminum alloy AA7075 sheets were deformed at room temperature at strain-rates exceeding 1000 /s using the electrohydraulic forming (EHF) technique. A method that combines high speed imaging and digital image correlation technique, developed at Pacific Northwest National Laboratory, was used to investigate high strain rate deformation behavior of ...
Piyush Upadhyay, Aashish Rohatgi, Elizabeth V. Stephens, Richard W. Davies, David Catalini   +4 more
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