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Showing 1 to 13 of 13 for “"Effective Material Properties"”.
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Design optimization of acoustic metamaterials and phononic crystals with a time domain method
… for shape optimizations of acoustic metamaterials and phononic crystals is presented. The gradient-based design procedure is suitable for large numbers of design variables, and results are shown on achieving effective material properties with a unit cell and the broadband noise reduction …
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Finite element analysis of periodic shells and origami tessellations
A numerical solver was designed to determine the effective material properties of smooth and rigid crease origamis. The solver was created using Ansys APDL and Workbench and utilized periodic boundary conditions for efficient unit cell-based simulations. Three origami tessellations were simulated …
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Mesoscale random fields of stiffness for in-plane elasticity
Unique effective material properties are not possible for random heterogeneous materials at intermediate length scales, which is to say at some mesoscale above the microscale yet prior to the attainment of the representative volume element (RVE). Focusing on elastic moduli in particular, a …
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Effects of Support Structure Geometry on SLM Induced Residual Stresses in Overhanging Features
… metal parts. The SLM process is time and cost effective for small-scale production; however, wide-spread adoption of this technique is severely limited by residual stresses that can cause large deformations and in-process build failures. The issues associated with residual stress accumulation …
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Investigative Application of the Intrinsic Extended Finite Element Method for the Computational Characterization of Composite Materials
… rates. Applying the IXFEM to model composite materials, through a representative volume element (RVE), the filler agents are defined as individual weak bimaterial interfaces. Though a series of RVE studies, calculating the effective elastic material properties of carbon nanotube-epoxy …
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Acoustic metamaterials : microperforated shell and Helmholtz resonator
[EMBARGOED UNTIL 12/01/2026] Metamaterials have been extensively developed in many areas over the past two decades, a great deal of research has been conducted on acoustic metamaterials exhibiting unusual dynamic effective material properties produced by artificially engineered microstructures. …
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Computational Studies on the Effective Properties of Two-Phase Heterogeneous Media
<p>The effective elastic modulus and conductivity of a two phase material system are investigated computationally using a Monte Carlo scheme. The continuum contains circular, spherical or ellipsoidal inclusions that are either uniformly or randomly embedded in the matrix. The computed results are …
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Optical Interactions in Self-Assembling Systems
… is a powerful tool for the fabrication of metamaterials with tailorable or exotic effective material properties. Of particular interest are optical metamaterials, since the lengthscales of the nanoparticle subunits and microscale assemblies match the interacting wavelengths of light. While this …
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Modeling and Analysis of Advanced Thermoelectric Modules Considering Thermal Losses
… in terms of output power and efficiency. Effective material properties were invoked for understanding the influence of temperature dependence of material parameters and related adverse effects on the model TEG. It is shown that analytical equations with effective properties can capture the …
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Peridynamic Investigation of Stress-Strain Response and Fracture Behavior Variations in Micro-CT Images of Mock Energetic Nanocomposites
… cases suggest that the overall sample had an effective stiffness of 4.396 +/- 1.153 GPa, though this varied significantly between images and image groupings. In addition, the effective stiffness of image groupings varied from 2.5 GPa to approximately 5 GPa as image number increased. These …
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Multiscale Peridynamics Analysis of Nanocomposites and Energetic Materials Using Nonlocal and Local Interface Models
… modeling is a critical aspect in any multi-material system modeling. Even a small change in the interface model may lead to significant changes in material behavior of the microscale, and these changes may transfer up to higher scales influencing the strain and stress fields, and damaging …
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Multiscale materials design of natural exoskeletons : fish armor
Biological materials have developed hierarchical and heterogeneous material nanostructures and microstructures to provide protection against various environmental threats that, in turn, provide bioinspired clues to man-made, protective material designs. In particular, designs of dermal fish armor …
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Study on Bandgap Manipulation and Structural Vibration Control in Sandwich Metastructures
… vibrations, particularly in terms of effective bandwidth and robustness to parameter variations and changing operating conditions. In recent years, inspired by advances in acoustic and mechanical metamaterials, metastructures with wave manipulation capabilities have opened up new …