Computational Investigation of the Effective Mechanical Behavior for 3D Pre-Buckled Auxetic Lattices
TypeArticles dans des revues avec comité de lecture
Negative Poisson’s ratio materials, or auxetics, have drawn attention for the past 30 years. The auxetic effect could lead to improved mechanical properties such as acoustic damping, indentation resistance, or crashworthiness. In this work, two 3D auxetic lattices are introduced. Auxeticity is achieved by design through pre-buckling of the lattice struts. The influence of geometrical parameters on the effective elastic properties is investigated using computational homogenization method with periodic boundary conditions. Effective Young’s modulus is 3D mapped to reveal anisotropy and identify spatial orientations of interest. The effective Poisson ratio is computed for various geometric configurations to characterize auxeticity. Finally, the influence of effective elastic properties on energy dissipation under compression is explored for elastoplastic lattices with different loading directions, using finite element simulations. Results suggest that loading 3D auxetic lattices along their stiffest direction maximizes their crashworthiness.
Files in this item
Showing items related by title, author, creator and subject.
BIRONEAU, Adrien; DIRRENBERGER, Justin; SOLLOGOUB, Cyrille; MIQUELARD-GARNIER, Guillaume; ROLAND, Sébastien (Wiley, 2016)The size of representative microstructural samples obtained from atomic force microscopy is addressed in this paper. The case of an archetypal one-dimensional nanolayered polymer blend is considered. Image analysis is ...
TORABIAN, Noushin; FAVIER, Véronique; ZIAEI-RAD, Saeed; DIRRENBERGER, Justin; ADAMSKI, Frédéric; RANC, Nicolas (Elsevier, 2016)The present work employed in situ infrared thermography to investigate the thermal response and dissipative mechanisms of a dual-phase steel under ultrasonic tension-compression fatigue testing. A classical thermal response ...
Self-Heating Measurements for a Dual-Phase Steel under Ultrasonic Fatigue Loading for stress amplitudes below the conventional fatigue limit TORABIAN, Noushin; FAVIER, Véronique; ZIAEI-RAD, Saeed; ADAMSKI, Frédéric; DIRRENBERGER, Justin; RANC, Nicolas (Elsevier, 2016)The aim of the present research was to study the self-heating behavior of a dual-phase steel under ultrasonic fatigue loading for stress amplitudes lower than the conventional fatigue limit. The steel studied in this ...
Correlation of the high and very high cycle fatigue response of ferrite based steels with strain rate-temperature conditions TORABIAN, Noushin; FAVIER, Véronique; DIRRENBERGER, Justin; ADAMSKI, Frédéric; ZIAEI-RAD, Saeed; RANC, Nicolas (Pergamon, 2017)The discrepancies observed between conventional and ultrasonic fatigue testing are assessed through the mechanisms of dislocation mobility in BCC metals. The existence of a transition condition between thermally-activated ...
Calorimetric Studies and Self-Heating Measurements for a Dual-Phase Steel Under Ultrasonic Fatigue Loading TORABIAN, Noushin; FAVIER, Véronique; ZIAEI-RAD, Saeed; DIRRENBERGER, Justin; ADAMSKI, Frédéric; RANC, Nicolas (ASTM International, 2016)The objective of the present research is to study the self-heating behavior of a dual-phase (DP) steel under ultrasonic fatigue loading and to investigate the effect of frequency on intrinsic heat dissipation of the material. ...