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Michael D. Todd
University of California, San Diego
335Publications
31H-index
4,161Citations
Publications 335
Newest
Published on Jan 1, 2019
Mayank Chadha2
Estimated H-index: 2
(University of California, San Diego),
Michael D. Todd31
Estimated H-index: 31
(University of California, San Diego)
In this paper, we present an improved methodology for the global shape reconstruction of rod-like structures that capture the effect of curvature, shear, torsion, axial deformation, and Poisson’s transformation. The inclusion of Poisson’s effect relaxes Euler-Bernoulli’s rigid cross-section assumption such that the cross-section could now undergo planar deformation (shrinking or expansion in the same plane). This scenario is particularly useful for the inflatable structures and pipelines subject...
1 Citations Source Cite
Published on Mar 1, 2019in International Journal of Solids and Structures 2.57
Mayank Chadha2
Estimated H-index: 2
(University of California, San Diego),
Michael D. Todd31
Estimated H-index: 31
(University of California, San Diego)
Abstract In this paper, we investigate the coupling of Poisson’s and warping effect for a general asymmetric cross-section of Cosserat beam. We present the challenges and inconsistencies observed as a result of our attempt to couple the two effects. The fully-coupled Poisson’s transformation is then developed to describe the in-plane deformation for the prismatic beam. A comprehensive kinematic treatment of geometrically exact and nonlinear Cosserat beam subjected to large deformation and finite...
2 Citations Source Cite
Mike Yeager3
Estimated H-index: 3
(University of California, San Diego),
Bill Gregory1
Estimated H-index: 1
(General Dynamics)
+ 1 AuthorsMichael D. Todd31
Estimated H-index: 31
(University of California, San Diego)
In this study, a damage detection and localization scenario is presented for a composite laminate with a network of embedded fiber Bragg gratings. Strain time histories from a pseudorandom simulated operational loading are mined for multivariate damage-sensitive feature vectors that are then mapped to the Mahalanobis distance, a covariance-weighted distance metric for discrimination. The experimental setup, data acquisition, and feature extraction are discussed briefly, and special attention is ...
3 Citations Source Cite
Published on Jan 1, 2019in Nonlinear Dynamics 4.34
Jin-Song Pei8
Estimated H-index: 8
(University of Oklahoma),
Joseph P. Wright8
Estimated H-index: 8
(Weidlinger Associates)
+ 2 AuthorsMichael D. Todd31
Estimated H-index: 31
(University of California, San Diego)
Choosing state variables in a state-space representation of a nonlinear dynamical system is a nonunique procedure for a given input–output relationship and therefore a potentially challenging task. It can be even more challenging when there are piecewise-defined restoring forces, as in bilinear hysteresis or Bouc–Wen models, which are just two of many such engineering mechanics models. Using various piecewise-smooth models, we make use of flow- and effort-controlled system concepts, common to bo...
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Published on Mar 1, 2019in International Journal of Fatigue 3.13
Michael Siu Hey Leung (Imperial College London), Joseph Corcoran3
Estimated H-index: 3
(Imperial College London)
+ 1 AuthorsMichael D. Todd31
Estimated H-index: 31
(University of California, San Diego)
Abstract The ability to perform accurate remnant life predictions is crucial to ensure the integrity of engineering components that experience fatigue loading during operation. This is conventionally achieved with periodic inspections, where results from non-destructive evaluation and estimation of the operating conditions are obtained to perform remnant life predictions using empirical crack growth laws. However, remnant life predictions made with this approach are very sensitive to their input...
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Mohammad Billah1
Estimated H-index: 1
,
Farzana Rahman1
Estimated H-index: 1
+ 3 AuthorsJay A. Farrell42
Estimated H-index: 42
Connected vehicle and driver's assistance applications are greatly facilitated by Enhanced Digital Maps (EDMs) that represent roadway features (e.g., lane edges or centerlines, stop bars). Due to the large number of signalized intersections and miles of roadway, manual development of EDMs on a global basis is not feasible. Mobile Terrestrial Laser Scanning (MTLS) is the preferred data acquisition method to provide data for automated EDM development. Such systems provide an MTLS trajectory and a ...
Published on Aug 1, 2019in Mechanical Systems and Signal Processing 4.37
Luis Gustavo Villani1
Estimated H-index: 1
(Sao Paulo State University),
Samuel da Silva11
Estimated H-index: 11
(Sao Paulo State University)
+ 1 AuthorsMichael D. Todd31
Estimated H-index: 31
(University of California, San Diego)
Abstract The damage detection problem becomes a more difficult task when the intrinsically nonlinear behavior of the structures and the natural data variation are considered in the analysis because both phenomena can be confused with damage if linear and deterministic approaches are implemented. Therefore, this work aims the experimental application of a stochastic version of the Volterra series combined with a novelty detection approach to detect damage in an initially nonlinear system taking i...
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Published on Jul 1, 2019in Computers & Structures 2.89
Mayank Chadha2
Estimated H-index: 2
(University of California, San Diego),
Michael D. Todd31
Estimated H-index: 31
(University of California, San Diego)
Abstract In this paper, we investigate an approach towards curve framing using material frames (MF). Motivated from the successful application of MF in shape sensing of rods in our previous work, we now present these frames as an alternative curve framing method. There are numerous instances of practical importance, where the dynamic system in consideration can be geometrically modeled by means of framed space curve. Unlike the Frenet-Serret and relatively parallel adapted frames (RPAF), the MF ...
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Published on Sep 10, 2018
Michael D. Todd31
Estimated H-index: 31
(University of California, San Diego),
William Gregory1
Estimated H-index: 1
+ 2 AuthorsJordan Ye (University of California, San Diego)
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Published on Sep 9, 2018in Sensors 2.48
Sumit Gupta2
Estimated H-index: 2
,
Han-Joo Lee1
Estimated H-index: 1
+ 3 AuthorsAlan Drew Barnett1
Estimated H-index: 1
2 Citations Source Cite
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