scholarly journals Influence of adhesive spew geometry and load eccentricity angle on metal-composite bonded joints tested at quasi-static and dynamic loading rates

2021 ◽  
pp. 114812
Author(s):  
Karthik Ramaswamy ◽  
Ronan M.O'Higgins ◽  
Michael A. McCarthy ◽  
Conor T. McCarthy
Keyword(s):  
Dynamic Loading ◽  
Metal Composite ◽  
Bonded Joints ◽  
Loading Rates ◽  
Static And Dynamic Loading

Size Effects on Yield Instabilities in Nickel

2006 ◽  
Vol 976 ◽  
Author(s):  
Megan J Cordill ◽  
Neville R Moody ◽  
William W Gerberich
Keyword(s):  
Single Crystal ◽  
Dynamic Loading ◽  
Size Effects ◽  
Statistical Distribution ◽  
Loading Rates ◽  
Initial Loading ◽  
Diamond Indenter ◽  
Cube Corner ◽  
Load Displacement ◽  
Static And Dynamic Loading

AbstractDislocation events are seen as excursions, or pop-in events, in the load-displacement trace of nanoindentation experiments. When indenting single crystal metals these events occur frequently during quasi-static and dynamic loading. A single crystal of Ni (111) has been indented quasi-statically using three different loading rates (10, 100, and 1000 μN/s) as well as with three different radii diamond indenter tips (1000 nm cone, 300 nm Berkovich, and 50 nm cube corner) to examine the occurrences of excursions. As expected, excursions at higher loads have larger displacements, and that initial loading follows Hertzian behavior up to the point of yield. Also, as the tip size is reduced the excursion loads are reduced. The excursion events depend mostly on the statistical distribution of surface sources and substructure dislocation arrangements.

On the Use of Side-Grooves in Estimating JIc Fracture Toughness With Charpy-Size Specimens

1980 ◽  
Vol 102 (2) ◽  
pp. 192-199 ◽  
Author(s):  
W. L. Server ◽  
R. A. Wullaert ◽  
R. O. Ritchie
Keyword(s):  
Fracture Toughness ◽  
Ductile Fracture ◽  
Dynamic Loading ◽  
Pressure Vessel ◽  
Crack Opening ◽  
Test Procedure ◽  
Maximum Load ◽  
Loading Rates ◽  
Surveillance Programs ◽  
Static And Dynamic Loading

The problem of obtaining a meaningful value of toughness from small Charpy-size surveillance specimens, tested at temperature corresponding to the upper shelf where ductile fracture predominates, is investigated. Following the procedures of Green and Knott for measurement of crack opening displacements at initiation of ductile fracture, a test procedure is adopted in which small precracked Charpy-size bend specimens are side-grooved to increasing depths and tested to failure under both quasi-static and dynamic loading rates. Values of the J-contour integral at maximum load (Jmax) for specimens side-grooved in excess of 30 percent are found to agree, within acceptable limits, with “valid” initiation JIc fracture toughness values determined independently using multi-specimen resistance-curve techniques. Three nuclear pressure vessel materials (two base metals, SA533B-1 and SA302B, and a submerged arc weld metal) were evaluated at temperatures between 71 and 177° C, which correspond to upper shelf temperatures. The test procedure described offers a simple, inexpensive, small specimen compromise for estimating the fracture toughness at the onset of ductile fracture from a single Charpy-size bend test piece for both quasi-static and dynamic loading rates. This approach could be readily adopted in nuclear surveillance programs for toughness evaluation of unirradiated and neutron irradiated pressure vessel steels.

Mechanical Characteristics of Superimposed 316L Lattice Structures under Static and Dynamic Loading

2021 ◽  
pp. 2001536
Author(s):  
Chao Chang ◽  
Wei Wu ◽  
Hui Zhang ◽  
Jianjun Chen ◽  
Yongze Xu ◽  
...  
Keyword(s):  
Dynamic Loading ◽  
Mechanical Characteristics ◽  
Lattice Structures ◽  
Static And Dynamic Loading

scholarly journals Damage to Shallow Tunnels under Static and Dynamic Loading

2017 ◽  
Vol 173 ◽  
pp. 1322-1329 ◽  
Author(s):  
Swapnil Mishra ◽  
K.S. Rao ◽  
N.K. Gupta ◽  
Ankeh Kumar
Keyword(s):  
Dynamic Loading ◽  
Shallow Tunnels ◽  
Static And Dynamic Loading
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