Interseismic Strain Accumulation near Lisbon (Portugal) from Space Geodesy

2021 ◽  
Author(s):  
João F.B.D. Fonseca ◽  
Mimmo Palano ◽  
Ana Paula Falcão ◽  
Alexis Hrysiewicz ◽  
Jose Fernandez
Keyword(s):  
Space Geodesy ◽  
Strain Accumulation

scholarly journals Interseismic Strain Accumulation near Lisbon (Portugal) from Space Geodesy

2021 ◽  
Author(s):  
J.F.B.D. Fonseca ◽  
M. Palano ◽  
A.P. Falcão ◽  
A. Hrysiewicz ◽  
J. Fernández
Keyword(s):  
Space Geodesy ◽  
Strain Accumulation

SLIP AND STRAIN ACCUMULATION ALONG THE SADIE CREEK FAULT, OLYMPIC PENINSULA, WA

2019 ◽  
Author(s):  
Cody Duckworth ◽  
◽  
Colin B. Amos ◽  
Elizabeth Schermer ◽  
John P. Loveless ◽  
...  
Keyword(s):  
Strain Accumulation ◽  
Olympic Peninsula

scholarly journals On the Plastic Strain Accumulation in Notched Bars During High-Temperature Creep Dwell

2020 ◽  
Vol 36 (2) ◽  
pp. 167-176 ◽  
Author(s):  
Daniele Barbera ◽  
Haofeng Chen
Keyword(s):  
High Temperature ◽  
Cyclic Loading ◽  
Plastic Strain ◽  
Kinematic Hardening ◽  
High Temperature Creep ◽  
Strain Accumulation ◽  
Material Models ◽  
Cyclic Loading Condition ◽  
Hardening Material ◽  
Temperature Creep

ABSTRACTStructural integrity plays an important role in any industrial activity, due to its capability of assessing complex systems against sudden and unpredicted failures. The work here presented investigates an unexpected new mechanism occurring in structures subjected to monotonic and cyclic loading at high temperature creep condition. An unexpected accumulation of plastic strain is observed to occur, within the high-temperature creep dwell. This phenomenon has been observed during several full inelastic finite element analyses. In order to understand which parameters make possible such behaviour, an extensive numerical study has been undertaken on two different notched bars. The notched bar has been selected due to its capability of representing a multiaxial stress state, which is a practical situation in real components. Two numerical examples consisting of an axisymmetric v-notch bar and a semi-circular notched bar are considered, in order to investigate different notches severity. Two material models have been considered for the plastic response, which is modelled by both Elastic-Perfectly Plastic and Armstrong-Frederick kinematic hardening material models. The high-temperature creep behaviour is introduced using the time hardening law. To study the problem several results are presented, as the effect of the material model on the plastic strain accumulation, the effect of the notch severity and the mesh element type and sensitivity. All the findings further confirm that the phenomenon observed is not an artefact but a real mechanism, which needs to be considered when assessing off-design condition. Moreover, it might be extremely dangerous if the cyclic loading condition occurs at such a high loading level.

scholarly journals Contribution to crustal strain accumulation of minor faults: a case study across the Niigata–Kobe Tectonic Zone, Japan

2020 ◽  
Vol 72 (1) ◽  
Author(s):  
Tomonori Tamura ◽  
Kiyokazu Oohashi ◽  
Makoto Otsubo ◽  
Ayumu Miyakawa ◽  
Masakazu Niwa
Keyword(s):  
Strain Accumulation ◽  
Tectonic Zone ◽  
Crustal Strain

scholarly journals The angular velocities of the plates and the velocity of Earth's centre from space geodesy

2010 ◽  
Vol 180 (3) ◽  
pp. 913-960 ◽  
Author(s):  
Donald F. Argus ◽  
Richard G. Gordon ◽  
Michael B. Heflin ◽  
Chopo Ma ◽  
Richard J. Eanes ◽  
...  
Keyword(s):  
Space Geodesy ◽  
Angular Velocities

Development of X80M Line Pipe Steel for Spiral Welded Pipes With Low Temperature Toughness and Excellent Weldability

2014 ◽  
Author(s):  
Nuria Sanchez ◽  
Özlem E. Güngör ◽  
Martin Liebeherr ◽  
Nenad Ilić
Keyword(s):  
Low Temperature ◽  
Life Cycle Cost ◽  
Volume Fraction ◽  
Large Diameter ◽  
Pipe Production ◽  
Strain Accumulation ◽  
Long Distance ◽  
Line Pipe ◽  
Low Temperature Toughness ◽  
Welded Pipe

The unique combination of high strength and low temperature toughness on heavy wall thickness coils allows higher operating pressures in large diameter spiral welded pipes and could represent a 10% reduction in life cycle cost on long distance gas pipe lines. One of the current processing routes for these high thickness grades is the thermo-mechanical controlled processing (TMCP) route, which critically depends on the austenite conditioning during hot forming at specific temperature in relation to the aimed metallurgical mechanisms (recrystallization, strain accumulation, phase transformation). Detailed mechanical and microstructural characterization on selected coils and pipes corresponding to the X80M grade in 24 mm thickness reveals that effective grain size and distribution together with the through thickness gradient are key parameters to control in order to ensure the adequate toughness of the material. Studies on the softening behavior revealed that the grain coarsening in the mid-thickness is related to a decrease of strain accumulation during hot rolling. It was also observed a toughness detrimental effect with the increment of the volume fraction of M/A (martensite/retained austenite) in the middle thickness of the coils, related to the cooling practice. Finally, submerged arc weldability for spiral welded pipe manufacturing was evaluated on coil skelp in 24 mm thickness. The investigations revealed the suitability of the material for spiral welded pipe production, preserving the tensile properties and maintaining acceptable toughness values in the heat-affected zone. The present study revealed that the adequate chemical alloying selection and processing control provide enhanced low temperature toughness on pipes with excellent weldability formed from hot rolled coils X80 grade in 24 mm thickness produced at ArcelorMittal Bremen.

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