From Architectured Materials to Large-Scale Additive Manufacturing
The classical material-by-design approach has been extensively perfected by materials scientists, while engineers have been optimising structures geometrically for centuries. The purpose of architectured materials is to build bridges across themicroscale ofmaterials and themacroscale of engineering structures, to put some geometry in the microstructure. This is a paradigm shift. Materials cannot be considered monolithic anymore. Any set of materials functions, even antagonistic ones, can be envisaged in the future. In this paper, we intend to demonstrate the pertinence of computation for developing architectured materials, and the not-so-incidental outcome which led us to developing large-scale additive manufacturing for architectural applications.
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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. ...
Isogeometric shape optimization of smoothed petal auxetic structures via computational periodic homogenization WANG, Zhen-Pei; POH, Leong Hien; DIRRENBERGER, Justin; ZHU, Yilin; FOREST, Samuel (Elsevier, 2017)An important feature that drives the auxetic behaviour of the star-shaped auxetic structures is the hinge-functional connection at the vertex connections. This feature poses a great challenge for manufacturing and may lead ...
AUFFRAY, Nicolas; DIRRENBERGER, Justin; ROSI, Giuseppe (Elsevier, 2015)In the present paper spaces of fifth-order tensors involved in bidimensional strain gradient elasticity are studied. As a result complete sets of matrices representing these tensors in each one of their anisotropic system ...
DIRRENBERGER, Justin; FOREST, Samuel; JEULIN, Dominique (Elsevier, 2014)The size of representative volume element (RVE) for 3D stochastic fibrous media is investigated. A statistical RVE size determination method is applied to a specific model of random microstructure: Poisson fibers. The ...