Full-field mechanical characterization of polyurethane foams under large deformations by digital image correlation

Casavola, Caterina; Core, Lucia Del; Moramarco, Vincenzo; Pappalettera, Giovanni; Patronelli, Marika

doi:10.1080/15376494.2021.1905915

Cited by 7 publications

(3 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, very less literature is available on experimental work focused on studying the effect of design factors on shear properties of tetra-anti-chiral structures. Further, some researchers have performed shear testing of cellular structures using a conventional fixture having fasteners and adhesives (Aboura et al, 2004;Azzouz et al, 2019;Novak et al, 2020;Casavola et al, 2021). Loading and unloading of the specimen in these fixtures is time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation on Effect of Design Factors on Shear Properties of Additively Manufactured Tetra-Anti-Chiral Cellular Metamaterial

Teraiya¹,

Vyavahare²,

Kumar³

2022

IJMMT

View full text Add to dashboard Cite

This paper presents numerical and experimental investigation on the effect of design factors on mechanical properties of tetra-anti-chiral cellular metamaterial under shear loading. Two design factors namely cylinder radius and strut thickness, and three response characteristics including shear strength, modulus and specific energy absorption (SEA) of structure are considered in the present study. Finite element analysis (FEA) of CAD models of structures is performed using non-linear mechanical simulation. For experimentation, specimens are manufactured using material extrusion technique of additive manufacturing. A novel fixture is designed and manufactured for quick loading and unloading of structures for shear testing. It is observed that with decrease in cylinder radius, strength and modulus increases, but SEA decreases. However, all three responses increase with increase in strut thickness. Optimization of design factors is performed using grey relational analysis to maximize responses. Furthermore, predictive models of responses are developed using regression analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation on Effect of Design Factors on Shear Properties of Additively Manufactured Tetra-Anti-Chiral Cellular Metamaterial

Teraiya¹,

Vyavahare²,

Kumar³

2022

IJMMT

View full text Add to dashboard Cite

show abstract

“…The experimental behavior of various auxetic foam materials has been extensively studied. The compressive stress/strain behavior has been studied by Bezazi and Scarpa (2007), Pastorino et al (2007), Lisiecki et al (2014), Duncan et al (2021), and the cyclic compressive stress/strain behavior by Casavola et al (2021), Bezazi and Scarpa (2007), Zhang et al (2020), Duncan et al (2016), Opreni et al (2020). Due to their negative Poisson’s ratio behavior, it is important to examine the Poisson behavior of auxetic foams as strain changes.…”

Section: Introductionmentioning

confidence: 99%

“…Bezazi and Scarpa (2007), Zhang et al (2020), Duncan et al (2016), Pastorino et al (2007), Duncan et al (2021) have tested the Poisson’s ratio under compressive strain while Zhang et al (2020), Scarpa et al (2005), Duncan et al (2021) have tested the Poisson’s ratio under tension. Additional work investigating the stress/strain behavior of open-cell polyurethane (PU) auxetic foams under tension has been completed (Casavola et al, 2021; Scarpa et al, 2005; Zhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Finite deformation and fractional order viscoelasticity of an auxetic foam

Stanisauskis

Miles

Oates

2022

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

Auxetic foams exhibit novel mechanical properties due to their unique microstructure for improved energy-absorption and cavity expansion applications that have fascinated the scientific community since their inception. Given the advancements in material processing and performance of polymer open cell auxetic foams, there is a strong desire to fully understand the nonlinear rate-dependent deformation of these materials. The influence of nonlinear compressibility is introduced here along with relaxation effects to improve model predictions for different stretch rates and finite deformation regimes. The viscoelastic behavior of the material is analyzed by comparing fractional order and integer order calculus models. All results are statistically validated using maximum entropy methods to obtain Bayesian posterior densities for the hyperelastic, auxetic, and viscoelastic parameters. It is shown that fractional order viscoelasticity provides [Formula: see text]–[Formula: see text] improvement in prediction over integer order viscoelastic models when the model is calibrated at higher stretch rates where viscoelasticity is more significant.

show abstract

Influence of the strain hardening behaviour on the tensile and compressive response of aluminium auxetic structures

Sabari

Andrade²,

Leitão³

et al. 2023

Composite Structures

View full text Add to dashboard Cite

Full-field mechanical characterization of polyurethane foams under large deformations by digital image correlation

Cited by 7 publications

References 53 publications

Numerical and Experimental Investigation on Effect of Design Factors on Shear Properties of Additively Manufactured Tetra-Anti-Chiral Cellular Metamaterial

Numerical and Experimental Investigation on Effect of Design Factors on Shear Properties of Additively Manufactured Tetra-Anti-Chiral Cellular Metamaterial

Finite deformation and fractional order viscoelasticity of an auxetic foam

Influence of the strain hardening behaviour on the tensile and compressive response of aluminium auxetic structures

Contact Info

Product

Resources

About