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 20 of 51 for “"Elastic Strain"”.
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SENSPECTRA : an elastic, strain-aware physical modeling interface
… for sensing and visualization of structural strain. The system functions as a distributed sensor network consisting of nodes, embedded with computational capabilities and a full spectrum LED, which communicate to neighbor nodes to determine a network topology through a system of flexible …
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Deep elastic strain engineering of materials electronic properties by machine learning
The introduction of elastic strains has become an appealing strategy for providing unique and exciting electronic properties in nanostructured materials. Recent successes in diamond and silicon deformation experiments further extended the applicable strain levels in these materials, harbingering a …
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Analysis of Plane Strain Deformations of Linearly Elastic Strain-Gradient Materials by the Finite Element Method
… to explain this size dependence, whereas a strain gradient continuum theory has intrinsic length scales and may well describe mechanical deformations of small size bodies. In the current contribution, we develop a numerical software based on the finite element method (FEM) to analyze …
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Mass transfer, creep and stress development during the drying of red oak
… and simulate the major perpendicular to gain strain components and associated stresses which develop as the result of mass transfer and restraint of shrinkage in red oak. Particular emphasis was placed on the rheological or creep components of strain. Mass transfer was measured during the …
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Generic Influences of Charged Defects on the Structure-Property Relationships of Modified Ferroelectric Barium Titanate and Antiferroelectric Sodium Niobate
… nearest-neighbor interactions and neglected the elastic effects associated with lattice distortions. Simulations demonstrated a general distribution pattern for charged defects. With increasing substituent concentration, more and larger defect clusters formed, which might be related with the …
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Dynamic Mechanical Properties of Cockroach(Periplaneta americana) Resilin
… at low frequencies, returning about 79% of the elastic strain energy at 25 Hz compared to 97% for dragonfly resilin. However, at the glass transition (200 kHz) the material returns about 47% of the elastic strain energy compared to 30% in dragonfly (2MHz ). The resilin pad in cockroach is a …
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High Deviatoric Strain Engineering/
… be tuned reversibly or irreversibly by imposing elastic or inelastic strain, leading to change of properties. This defines the concept of strain engineering, which includes both elastic strain engineering (ESE) and inelastic strain engineering (ISE). In this thesis, we study ESE and ISE by …
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The dynamic response of a flexible three-link robot using strain gages, Lagrange polynomials, Fourier series, and the finite element analysis
… manipulator. The Links are designed to deform elastically under static and dynamic loads. Lagrange polynomials are derived to determine the defected shape of the robotic links. All coefficients of the Lagrange polynomials are functions of the elastic strain at three specific locations on each …
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Early-age hydration and volume change of calcium sulfoaluminate cement-based binders
… (CSA) cement whose early-age expansion in restrained condition induces compressive stress that can be utilized to counter the tensile stresses due to shrinkage. In addition to enhancing the resistance against shrinkage cracking, CSA cement also has lower carbon footprint than that of Portland …
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A Barkhausen Noise Testing System for CANDU Feeder Pipes
… total BN energy from ±2% to ±7%. Precision for elastic strain estimation in feeder pipes was found to be between ±7 MPa and ±9 MPa in tension, depending on the excitation field configuration, and negligible in compression. Modelling of the BN penetration depth as a function of the excitation …
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Vibrations of an isolated wind turbine blade using the finite element method
… Additionally, expressions are formulated for the elastic strain energy and kinetic energy of a rotating wind turbine blade. Lagrange's equation is applied to these energy expressions and an isoparametric finite element based on three dimensional elasticity and quadratic interpolation functions is …
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Effect of Design Parameters and Intercalation Induced Stresses in Lithium Ion Batteries
… generation in the Si NW due to chemical and elastic strain, stress generation in the Cu CC due to elastic strain, and volume expansion in the Si NW and Cu CC geometries. The evolution of stress components, i.e., radial, axial and tangential stresses in different regions in the Si NW are …
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Dynamic analysis of a marine riser
… for a beam undergoing finite rotations. The elastic strain energy is expressed in terms of these deformations and the Lagrange equations are used to derive the equations of motion valid for large deformations. The three dimensional shear effect based on nonlinear elastic theory is included in …
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Magnetoelectric Effect in Ferroelectric-Ferromagnetic Heterostructures
… phase can be magneto-electrically coupled via elastic strain mediation. Bulk magnetoelectric composites have been intensively studied as magnetic sensors due their significant magnetic-to-electric signal transforming efficiency, which promises high magnetic field sensitivity. In contrast, …
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Dowel-concrete contact characteristics
… using a novel laboratory setup of vibrating wire strain gauges embedded in both the dowel and concrete. The gages are set to measure the shrinkage strain induced in the concrete that surrounds the dowel as it cures causing the solidified concrete to clamp on the steel dowel. The measurements …
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A Theoretical Model for Captive Columns in Bending
… The total deflection is obtained by setting the elastic strain energy stored in the captive column equal to the work that is applied to the column. The effects of changes in individual design parameters are investigated using the theoretical model. Experimental data was obtained to verify the …
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A framework for designing interlayers for ceramic-to-metal joints
… equations. In these equations, the accumulated elastic strain energy in the ceramic has been used as a more reliable metric for quantifying residual stresses and predicting failure stress. The equations provide a useful functional relationship between the strain energy, material properties, and …
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Kinematically consistent, elastic block model for the eastern Mediterranean constrained by GPS measurements
… Positioning System (GPS) velocity field to constrain block models of the eastern Mediterranean and surrounding regions that account for the angular velocities of constituent blocks and elastic strain accumulation on block-bounding faults in the interseismic period. Kinematically consistent …
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Dynamic Mechanical Properties of Resilin
Resilin is an almost perfect elastic protein found in many insects. It can be stretched up to 300% of its resting length and is not affected by creep or stress relaxation. While much is known about the static mechanical properties of resilin, it is most often used dynamically by insects. …
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Magnetic and Elastic Interactions at Cracks and Interfaces in Ferromagnetic Materials
… coupled with a continuum mechanics model for elastic strain to formulate analytical expressions for the interaction of a magnetic field with several crack geometries. The influence of crack velocity and a realistic (nonlinear) magnetic susceptibility were included into a model of this type for …
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