Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Hysteresis Models"”.
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Evaluation of Connection Fracture and Hysteresis Type on the Seismic Response of Steel Buildings
… topic of the research is to study the effects of hysteresis models on structural performance. During the performance-based structure design, the effects of hysteretic energy dissipation on the maximum displacement response amplitude of buildings plays a important role in determining the design …
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Investigations Into the Physical Mechanisms That Facilitate Transformation Hysteresis in Shape Memory Alloys
… into a thermo-mechanical framework. Models are formulated for the thermal and stress hysteresis based on a thermo-mechanical framework so as to shed light into differential hysteresis magnitudes. Current theoretical formulations consider energy dissipation from a phenomenological …
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Modeling and control of undesirable dynamics in atomic force microscopes
… longitudinal and lateral dynamics, creep, and hysteresis. Models for probe-sample interactions and cantilever dynamics were also included. The models were used to improve the dynamic response and hence image quality of contact-mode AFM. An extensive parametric study has been performed to …
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Analysis of Glubam Joint Behavior and Truss Model Updating Based on Optimization Algorithms
… high-fidelity three-dimensional finite element models and simplified low-fidelity hysteresis models were developed to capture the nonlinear mechanical responses of the two joint types. For the simplified models, two parametric hysteresis constitutive models were proposed to reproduce critical …
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Effect of Hysteresis Type on Drift Capacity for Global Collapse of Moment Frame Structures for Seismic Loads
It is conjectured that different hysteresis behavior in moment frames subjected to seismic loads may lead to different levels of response because of degradation in strength and stiffness. To examine the existence and magnitude of this effect, this research aims to: (1) Determine the global collapse …
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Framework for a Unified Macroscale Model of Magnetostriction
… model of magnetostriction. The lack of accurate models of macroscale hysteretic magnetostriction has inhibited the development of novel devices and savings. This thesis presents a framework for such a model. After motivating and providing the necessary background knowledge regarding these models, …
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Modeling and control of smart structures embedded with magnetorheological devices
… the embodied energy level. Multi-variable hysteresis models for these structural members are developed, capable of effectively working in a wide scale of loading amplitude and frequency. The modeling objective is to illustrate the intrinsic nonlinearity with traceable relationships between …
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Sensitivity Study on Modification of Vertical Distribution of Strength and Stiffness in Wood Shear Wall Building Models
… is employed in this study. The analytical models include P-Delta effects and utilize the 10-parameter hysteresis CASHEW model. It is observed that the Parabolic strength distribution allows for dissipation of energy over the height of the building, has less collapse risk than other strength …
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Quantifying factors that influence road deicer retention and export in a multi-landuse Upstate New York watershed
… were used to construct a concentration/discharge hysteresis model of six storm events to determine seasonal variability in stream pollutant source. Results from weekly Fall and Spring stream and groundwater grab samples from 2006–2016 were used in conjunction with the model results to interpret …
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Essays in open economy macroeconomics
… 1973 and 1993, and finds robust evidence of hysteresis in the structure of US 2-digit manufacturing industries. Following a transitory appreciation of the real exchange rate, employment in manufacturing industries is found to drop permanently, following a fall in the employment stock both of …
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Discrete Modeling and Sliding Mode Control of Piezoelectric Actuators
… existence of various effects in PEAs, such as hysteresis and creep, as well as dynamics can seriously degrade the PEA performance or even lead to instability. This raises a great need to model and control PEAs for improved performance, which have drawn remarkable attention in the literature. …