Data-driven nonparametric identification of material behavior based on physics-informed neural network with full-field data

I Jeong, M Cho, H Chung, DN Kim - Computer Methods in Applied …, 2024‏ - Elsevier
Abstract A Physics-Informed Neural Network (PINN) model is developed to extract material
behavior from full-field displacement data. The PINN model consists of independent …

Beyond Hopkinson's bar

F Pierron, H Zhu, C Siviour - … Transactions of the Royal …, 2014‏ - royalsocietypublishing.org
In order to perform experimental identification of high strain rate material models, engineers
have only a very limited toolbox based on test procedures developed decades ago. The best …

Investigation of the dynamic stress–strain response of compressible polymeric foam using a non-parametric analysis

B Koohbor, A Kidane, WY Lu, MA Sutton - International Journal of Impact …, 2016‏ - Elsevier
Dynamic stress–strain response of rigid closed-cell polymeric foams is investigated in this
work by subjecting high toughness polyurethane foam specimens to direct impact with …

Ultra‐high‐speed full‐field deformation measurements on concrete spalling specimens and stiffness identification with the virtual fields method

F Pierron, P Forquin - Strain, 2012‏ - Wiley Online Library
For one decade, spalling techniques based on the use of a metallic Hopkinson bar in
contact with a concrete sample have been widely employed to characterise the dynamic …

In situ deformation characterization of density-graded foams in quasi-static and impact loading conditions

B Koohbor, S Ravindran, A Kidane - International Journal of Impact …, 2021‏ - Elsevier
Digital image correlation is utilized to characterize deformation and strain fields developed
within the layers of density-graded multilayered foam structures subjected to uniaxial quasi …

Effect of specimen size, compressibility and inertia on the response of rigid polymer foams subjected to high velocity direct impact loading

B Koohbor, A Kidane, WY Lu - International Journal of Impact Engineering, 2016‏ - Elsevier
The influences of specimen length-to-diameter ratio, material compressibility, and inertia on
direct impact response of high density closed-cell polymeric foam are investigated. High …

Experimental investigation of the shear dynamic behavior of double-lap adhesively bonded joints on a wide range of strain rates

G Challita, R Othman, P Casari, K Khalil - International Journal of Adhesion …, 2011‏ - Elsevier
The main concern of this work is the mechanical characterization of adhesively bonded
assemblies under dynamic shear loading ranging from quasi-static (10− 4s− 1) up to high …

Strain rate sensitivity of polyurea coatings: Viscous and elastic contributions

M Tripathi, S Parthasarathy, D Kumar, P Chandel… - Polymer Testing, 2020‏ - Elsevier
Polyurea, a reaction product of isocyanates and an amine blend has been reported to be
highly strain rate sensitive, which responds in its own unique way when subjected to …

Tension testing of silicone rubber at high strain rates

L Guo, Y Lv, Z Deng, Y Wang, X Zan - Polymer Testing, 2016‏ - Elsevier
The effect of strain rate on the tension behavior of filled silicone rubber was investigated
over a wide range of strain rates. A non-contact optical measurement technique was used to …

Impact testing of polymeric foam using Hopkinson bars and digital image analysis

J Liu, D Saletti, S Pattofatto, H Zhao - Polymer testing, 2014‏ - Elsevier
The present investigation aims at testing polymeric foam under impact loading using large
diameter nylon Hopkinson bars and optical field measurements. Accurate average stress …