Analogous mechanical behaviors in \langle 100\rangle and \langle 110\rangle directions of Cu nanowires under tension and compression at a high strain rate

2007 ◽  
Vol 18 (39) ◽  
pp. 395705 ◽  
Author(s):  
Yuan-Ching Lin ◽  
Dar-Jen Pen
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Mechanical Behaviors ◽  
Cu Nanowires ◽  
Tension And Compression

Tension and Compression Behavior of Pre-Stressed Steel Strands at High Strain Rate

2011 ◽  
Vol 82 ◽  
pp. 154-159 ◽  
Author(s):  
Anatoly M. Bragov ◽  
Ezio Cadoni ◽  
Alexandr Yu. Konstantinov ◽  
Andrey K. Lomunov
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Split Hopkinson Pressure Bar ◽  
High Strength ◽  
Gauge Length ◽  
Hopkinson Pressure Bar ◽  
Dog Bone ◽  
Tension And Compression ◽  
Set Up

In this paper is described the mechanical characterization at high strain rate of the high strength steel usually adopted for strands. The experimental set-up used for high strain rates testing: in tension and compression was the Split Hopkinson Pressure Bar installed in the Laboratory of Dynamic Investigation of Materials in Nizhny Novgorod. The high strain rate data in tension was obtained with dog-bone shaped specimens of 3mm in diameter and 5mm of gauge length. The specimens were screwed between incident and transmitter bars. The specimens used in compression was a cylinder of 3mm in diameter and 5mm in length. The enhancement of the mechanical properties is quite limited compared the usual reinforcing steels.

High Strain Rate Behaviour of AA7075 Aluminum Alloy at Different Initial Temper States

2015 ◽  
Vol 651-653 ◽  
pp. 114-119 ◽  
Author(s):  
Marco Sasso ◽  
Archimede Forcellese ◽  
Michela Simoncini ◽  
Dario Amodio ◽  
Edoardo Mancini
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Fracture Morphology ◽  
Compression Tests ◽  
Elongation At Break ◽  
Tension And Compression ◽  
Split Hopkinson ◽  
Ductile Behavior ◽  
Electronic Microscope

The aim of this work is to study the mechanical properties of alloy AA7075 in both T6 and O temper states, in terms of visco-plastic and fracture behavior. Tension and compression tests were carried out starting from the quasi-static loading condition 10-3 up to strain rates as high as 2 x 103 s-1. The high strain rate tests were performed using a Split Hopkinson Tension-Compression Bar (SHTCB) apparatus. The tensile specimens were also subjected to micro-fractography analysis by Scanning Electronic Microscope (SEM) to evaluate the characteristics of the fracture. The results show a different behavior for the two temper states: AA7075-O showed a significant sensitivity to strain rate, with a ductile behavior and a fracture morphology characterized by coalescence of microvoids, whilst AA7075-T6 is generally characterized by a less ductile behaviour, both as elongation at break and as fracture morphology. Brittle cleavage is accentuated with increasing strain rate. The Johnson-Cook viscoplastic model wad also used to fit the experimental data with an optimum matching.

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