Mechanical Properties of Foamed Thermoplastics

Highly anisotropic crosslinked HDPE foams with a controlled anisotropy ratio: Production and characterization of the cellular structure and mechanical properties

“…Hence, the production route explained in this work allows obtaining foamed materials with the same density and different mechanical properties just by controlling the anisotropy ratio. Results obtained are in agreement with those found in literature [2,22,32,36]. 4.…”

Correlation between Local Stress and Strain and Lamina Cribrosa Connective Tissue Volume Fraction in Normal Monkey Eyes

“…Moreover, the functional form of the microstructure-to-stiffness relationship in Equation (1) has not been experimentally verified for LC tissue. Power law relationships have historically been used to relate density to material properties in porous foams 38, 39 and the particular form incorporating anisotropy used in the present study was adopted from the literature related to trabecular bone mechanics 37. While we acknowledge that the material properties for bone differ substantially from the soft connective tissue structure of the LC, the formulation was adopted based on the similarity in these tissues’ microarchitectures.…”

Anisotropic compressive properties of multiwall carbon nanotube/polyurethane foams

“…These results show the potential of MWCNTs as reinforcements for PUFs. However, PUFs are often mechanically anisotropic (Gibson and Ashby, 1997;Huber and Gibson, 1988;Metha and Colombo, 1976;Hamilton et al, 2013) and the changes in the foam's microstructure by the inclusion of MWCNTs, concomitant with the changes in anisotropy, have been very scarcely investigated. Hamilton et al (2013) are probably the only ones in the open literature that have formally reported on the anisotropy of PUFs reinforced with several nanofillers.…”

“…As a result, its microstructural cells are more elongated along the rising direction than along both transverse ones. In this condition, since both transverse directions are assumed to behave equally, the resulting microstructure and consequent mechanical properties of the PUFs are often transversely isotropic (Gibson and Ashby, 1997;Huber and Gibson, 1988;Metha and Colombo, 1976;Hamilton et al, 2013). Therefore, given this motivation, this study investigates the anisotropic compressive mechanical properties of PUFs modified by small concentrations (62 wt.%) of MWCNTs with particular focus on the relationship between the foam's microstructure and its resulting anisotropy.…”