Dear Colleagues,
We invite you to submit a paper to the 2020 Society for Experimental Mechanics (SEM) Annual Meeting in one of the many sessions in the Fatigue and Fracture Track. See below for further information on these sessions, and please forward this to others who may be interested.
I have an opening for a two-year postdoctoral fellowship at Duke University. The project is a collaboration with experimentalists. and concerns problems in which fractures are driven by fluid flow through porous media.
The ideal candidate will have some background in finite element methods and mechanics, nonlinear coupled field problems, C++, and high-performance computing. Experience with fracture mechanics is useful but not required.
I hope some of you will find this work interesting. We present a new Weibull framework for cleavage fracture that incorporates strain gradient plasticity and can estimate the three parameters of Weibull-type models without any prior assumptions. A post-print is available at www.empaneda.com
Gradient-enhanced statistical analysis of cleavage fracture
Emilio Martínez-Pañeda, Sandra Fuentes-Alonso, CovadongaBetegón
European Journal of Mechanics - A/Solids 77, 103785 (2019)
We have discovered a peculiar form of fracture that occurs in a highly stretchable silicone elastomer (Smooth-On Ecoflex 00–30). Under certain conditions, cracks propagate in a direction perpendicular to the initial pre-cut and in the direction of the applied load. In other words, the crack deviates from the standard trajectory and instead propagates perpendicular to that trajectory. The crack arrests stably, and thus the material ahead of the crack front continues to sustain load, thereby enabling enormous stretchabilities. We call this phenomenon 'sideways' and stable cracking.
A post-doctoral position is immediately available in a research group by Prof. Kyoungsoo Park at the School of Civil & Environmental Engineering, Yonsei University, Seoul, Korea. The successful applicant should have strong research background on computational fracture mechanics associated with cohesive zone modeling, contact mechanics, microstructure computation, hygro-thermo-mechanical analysis, parallel computing or related research area. Specific research direction can be discussed. If interested, please contact Dr.
I hope some of you will find our recent paper in the Journal of the Mechanics and Physics of Solids interesting. The Abaqus user element (UEL) subroutine developed to implement strain gradient plasticity theories with energetic and dissipative higher order stresses (Gudmundson 2004, Fleck and Willis 2009) can be downloaded from www.empaneda.com/codes
The role of plastic strain gradients in the crack growth resistance of metals
Emilio Martínez-Pañeda, Vikram S. Deshpande, Christian F. Niordson, Norman A. Fleck
