Results 251 to 260 of about 8,936,346 (275)

Non-uniform strain field reconstruction of FBG using an adaptive Nelder–Mead algorithm

Optics Communications, 2021
Abstract This paper presents an adaptive Nelder–Mead algorithm to inversely reconstruct the non-uniform strain field from the reflected intensity spectrum of the fiber grating sensor. In this algorithm, the standard operating parameters are modified to adapt to the variable strain profiles, and an improved transfer matrix method is adopted to rapidly
Yufang Bai, Jie Zeng, Jiwei Huang, Zhuming Cheng, Qidi Zhao, Dakai Liang   +5 more
openaire   +1 more source

Strained Field of Silver Overlayers Deposited on the Reconstructed Si(111) Surface

MRS Proceedings, 1992
ABSTRACTWe have performed high resolution x-ray diffraction measurements of the strain field in UHV deposited Ag(111) films on a 7×7 reconstructed Si(111) surfaces shows a faulted epitaxial layer with a 0.4% out-of-plane strain, and a -1% in-plane strain.
L. J. Martinez-Miranda, J. J. Santiago-Aviles, Raul Perez-Sandoz, Randolph Carolissen, H. H. Weitering, W. R. Graham   +5 more
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Strain field reconstruction in shallow trench isolation structures by CBED and LACBED

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2006
Using a combination of the CBED and the LACBED techniques in the transmission electron microscopy (TEM), we have investigated the strain field in the silicon active region of a shallow trench isolation structure, underlying a TiSi2 layer. Starting from the analysis of the deformation in a sample, thinned for TEM analysis, we have reconstructed the ...
Spessot A, Frabboni S, Balboni R, Armigliato A   +3 more
openaire   +4 more sources

On reconstruction of strain fields from tomographic data

Inverse Problems, 2015
A method of reconstruction of a strain tensor in a solid body was described that uses non-redundant data of the axial (longitudinal) and of the traceless normal ray integrals.
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Correction to: Computationally efficient stress reconstruction from full-field strain measurements

Computational Mechanics
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Halilovič, Miroslav, Starman, Bojan, Coppieters, Sam   +2 more
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Strain field reconstruction on composite spars based on the identification of equivalent load conditions

SPIE Proceedings, 2017
Technologies based on optical fibers provide the possibility of installing relatively dense networks of sensors that can perform effective strain sensing functions during the operational life of structures. A contemporary trend is the increasing adoption of composite materials in aerospace constructions, which leads to structural architectures made of ...
AIROLDI, ALESSANDRO, Marelli, L., BETTINI, PAOLO, SALA, GIUSEPPE, Apicella, A.   +4 more
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Discontinuous Digital Image Correlation to reconstruct displacement and strain fields with discontinuities: Dislocation approach

Engineering Fracture Mechanics, 2018
Abstract Reconstruction of strain and displacement fields from surface images of materials and structures in the presence of discontinuities is a challenging task. Digital Image Correlation (DIC) – a commonly used technique to reconstruct displacement and strain fields when deformation is continuous – fails in the presence of discontinuities ...
Ghulam Mubashar Hassan, Arcady V. Dyskin, Cara K. MacNish, Elena Pasternak, Igor Shufrin   +4 more
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APPLICATIONS OF SMART BRICKS FOR STRAIN FIELD RECONSTRUCTION IN MASONRY WALLS: NUMERICAL ANALYSIS AND SHAKING TABLE TESTS

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015), 2019
Masonry structures are particularly vulnerable to seismic loads due to their brittle and non-homogeneous behavior. Therefore, assessing their conditions after significant events is especially critical: this could be achieved through a reliable monitoring system able to identify significant variations of strains and stresses which could induce cracks ...
D'Alessandro A., Meoni A., Cavalagli N., Gioffre M., Ubertini F.   +4 more
openaire   +2 more sources

Physics-Informed Neural Networks for Sparse Strain-Field Reconstruction in 4D-STEM

Quantitative strain mapping using four-dimensional scanning transmission electron microscopy (4D-STEM) typically requires densely sampled scans that can damage beam-sensitive specimens. We develop a physics-informed neural network (PINN) for sparse 4D-STEM strain reconstruction that embeds elastic equilibrium and Saint-Venant compatibility in the ...
Reis, Roberto dos, Santos, Gabriel T. dos, Liu, Yukun, Hu, Xiaobing, Dravid, Vinayak P.   +4 more
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Extending Digital Image Correlation to Reconstruct Displacement and Strain Fields around Discontinuities in Geomechanical Structures under Deformation

2015 IEEE Winter Conference on Applications of Computer Vision, 2015
Reconstruction of displacement and strain fields in geomechanical structures from surface images is a challenging task. Digital Image Correlation (DIC) is a well known technique to achieve these tasks if deformation is continuous but it fails in the presence of discontinuities.
Ghulam Mubashar Hassan, Cara K. MacNish, Arcady V. Dyskin   +2 more
openaire   +2 more sources