Details

Autor(en) / Beteiligte

• Singaravelu, Arun Sundar S.
• Williams, Jason J.
• Shevchenko, Pavel
• Ruppert, Jasmin
• De Carlo, Francesco
• Henderson, Mark
• Holmes, Chris
• Chawla, Nikhilesh

Titel

Poisson’s ratio of eTPU molded bead foams in compression via in situ synchrotron X-ray microtomography

Ist Teil von

• Journal of materials science, 2021-08, Vol.56 (22), p.12920-12935

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In situ synchrotron X-ray microtomography was used to characterize the bulk deformation behavior by computing the Poisson’s ratio of expanded thermoplastic polyurethane (eTPU) molded bead foams used in footwear midsole during compression. Quantitative data on morphological characteristics were obtained using an iterative image processing workflow. Image correlation on the 4D datasets using DVC was performed to calculate the volumetric and axial strain to estimate the Poisson ratio. Strain maps from DVC showed the influence of variability in ligament thickness distribution on the global mechanical behavior exhibited which dominated the response seen in these bead foams. Finally, our results showed a strong correlation between Poisson ratio and distribution of ligament thickness in foams.