Design of Shape Forming Elements for Architected Composites via Bayesian Optimization and Genetic Algorithms: A Concept Evaluation DOI Open Access
David O. Kazmer, Rebecca H. Olanrewaju, David C. Elbert

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(21), P. 5339 - 5339

Published: Oct. 31, 2024

This article presents the first use of shape forming elements (SFEs) to produce architected composites from multiple materials in an extrusion process. Each SFE contains a matrix flow channels connecting input and output ports, where are routed between corresponding ports. The mathematical operations rotation shifting described, design automation is explored using Bayesian optimization genetic algorithms select fifty or more parameters for minimizing two objective functions. aims match target cross-section by pixel-by-pixel error, which weighted with structural similarity index (SSIM). second seeks maximize information content SSIM relative white image. Satisfactory designs achieved better function values observed rectangular rather than square channels. Validation modeling clay demonstrates that while SFEs impose complex material transformations, they do not achieve distributions predicted digital model. Using results comparison, initial stages yielded near 0.8 simulation, indicating good match. However, control processing tended decline successive extruded dropping 0.023 intent. Flow simulations closely replicated structures around 0.4 but also failed predict intended cross-sections. evaluation highlights need advanced techniques enhance predictive accuracy functionality biomedical, energy storage, applications.

Language: Английский

Anti-plane interfacial waves in a square lattice DOI Open Access
Victor A. Eremeyev

Networks and Heterogeneous Media, Journal Year: 2025, Volume and Issue: 20(1), P. 52 - 64

Published: Jan. 1, 2025

<p>Using the lattice dynamics approach, we discussed propagation of interfacial waves localized near interface in an infinite square lattice. The has been modeled as a single-particle layer material particles with masses and elastic bonds different from those bulk. In this structure there were anti-plane waves, i.e., that decayed exponentially distance interface. Such could be useful for determining properties vicinity We obtained equations motion analyzed corresponding dispersion relations steady-state solutions. Here, equation related circular frequency to wave number. addition, provided comparison derived within Gurtin-Murdoch surface elasticity. To do this, have used scaling law links continuum discrete models. Unlike model, model number was limited by first Brillouin zone, whereas it took range zero infinity. detailed parametric analysis given model. Finally, other models interfaces case discussed.</p>

Language: Английский

Citations

0
Exact critical temperatures for snap-through of an active simply supported buckled beam under a longitudinal half sine wave temperature profile DOI
Matthew L. Smith

Mathematics and Mechanics of Solids, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 4, 2025

The buckled beam is a fundamental building block used to produce morphing structures. advancement of responsive materials has enabled these blocks actively transform structures between multiple states. Often the driving stimulus applied structural elements in longitudinally nonuniform fashion. However, most models assume uniform application or rely on numerical results, which obscure connections system parameters and response. In this work, we examine thermally responsive, consider temperature profile be half sine wave along its length. This assumption makes analysis convenient enables derivation an exact expression for critical rise leading loss stability under range conditions. addition, very simple obtained predicting crossover from symmetric snap-through mode unsymmetrical transitions results give insight into design strategies also lay foundation analyzing more complex systems.

Language: Английский

Citations

0
Simulating bone healing with bio-resorbable scaffolds in a three-dimensional system: insights into graft resorption and integration DOI Creative Commons
Rachèle Allena, Daria Scerrato, Alberto Maria Bersani

et al.

Comptes Rendus Mécanique, Journal Year: 2025, Volume and Issue: 353(G1), P. 479 - 497

Published: March 10, 2025

Language: Английский

Citations

0
A dissipation model for concrete based on an enhanced Timoshenko beam DOI Open Access

Giuliano Aretusi,

Christian Cardillo,

Larry Murcia Terranova

et al.

Networks and Heterogeneous Media, Journal Year: 2024, Volume and Issue: 19(2), P. 700 - 723

Published: Jan. 1, 2024

<p>A novel Timoshenko beam model enriched to account for dissipation in cement-based materials was presented this paper. The introduced a new variable representing the relative sliding inside microcracks within material. In paper, microcrack density not supposed increase, assuming small deformation regime that implied no damage growth. utilized an expanded version of principle virtual work whose contributions came from external forces, internal elastic and due microcrack's microstructure. energy included terms related micro-macro interactions, accounting nonlinearity material behavior. Numerical simulations, conducted using finite element method, evaluated mechanical properties under three-point flexural tests compression tests. These enabled assessment dissipative behavior cyclic loading. Results showed dissipated cycles responses influenced by mechanics. Additionally, parametric study, varying friction force amplitude, revealed its impact on energy. study highlighted non-monotonic relationship between amplitude energy, with optimal value maximizing dissipation. Overall, provided insights into mechanics materials, particularly regarding dissipation, which essential understanding their structural applications.</p>

Language: Английский

Citations

1
Design of Shape Forming Elements for Architected Composites via Bayesian Optimization and Genetic Algorithms: A Concept Evaluation DOI Open Access
David O. Kazmer, Rebecca H. Olanrewaju, David C. Elbert

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(21), P. 5339 - 5339

Published: Oct. 31, 2024

This article presents the first use of shape forming elements (SFEs) to produce architected composites from multiple materials in an extrusion process. Each SFE contains a matrix flow channels connecting input and output ports, where are routed between corresponding ports. The mathematical operations rotation shifting described, design automation is explored using Bayesian optimization genetic algorithms select fifty or more parameters for minimizing two objective functions. aims match target cross-section by pixel-by-pixel error, which weighted with structural similarity index (SSIM). second seeks maximize information content SSIM relative white image. Satisfactory designs achieved better function values observed rectangular rather than square channels. Validation modeling clay demonstrates that while SFEs impose complex material transformations, they do not achieve distributions predicted digital model. Using results comparison, initial stages yielded near 0.8 simulation, indicating good match. However, control processing tended decline successive extruded dropping 0.023 intent. Flow simulations closely replicated structures around 0.4 but also failed predict intended cross-sections. evaluation highlights need advanced techniques enhance predictive accuracy functionality biomedical, energy storage, applications.

Language: Английский

Citations

1