cracks

In this work, we show that the combination of material quenched disorder (of finite strength/amplitude and correlation length) and a 2D tip-splitting instability (that gives rise to extra fracture surfaces) is at the heart of the spatiotemporal dynamics of cracks in 3D. Specifically, it is shown to account for the widely observed limiting (terminal) velocity of cracks, mirror-mist-hackle sequence of morphological transitions, crack macro-branching and a 3D-to-2D transition, out-of-plane crack front waves and the properties of micro-branches.  

Following the previous Blog entry on 3D fracture and out-of-plane crack structures: the essential role of material disorder, we add here a related manuscript (see also attached PDF):

Size selection of crack front defects: Multiple fracture-plane interactions and intrinsic lengthscales

In this pair of preprints (see also attached PDFs):

Quenched disorder and instability control dynamic fracture in three dimensions

Facet formation in slow three-dimensional fracture

In our latest article, “Uncovering stress fields and defects distributions in graphene using deep neural networks”: https://doi.org/10.1007/s10704-023-00704-z , we showed that conditional generative adversarial networks (cGANs) could transform complex deformation fields into stress fields by eliminating the need to evaluate elasticity distributions and develop complex nonlinear constitutive relations.

Please see the MPIE website for the job description & online application

We present a systematic approach to deal with the modelling and analysis of the cracked rotating shafts behaviour. We begin by revisiting

the problem of modelling the breathing mechanism of the crack. Here we consider an original approach based on the form we give to the energy of the system and then identify

the mechanism parameters using 3D computations with unilateral contact conditions on the crack lips. A dimensionless flexibility is identified which makes the application