research
Phase-field modeling of crack propagation in polycrystalline materials
A phase-field model based on a modified form of the regularized formulation of Griffith’s fracture theory is presented to investigate intergranular and transgranular crack propagations in polycrystalline brittle materials. Grains and grain boundaries are incorporated in the crack initiation and propagation model based on a phase-field model for grain growth, in which the elastic anisotropy varies based on the grain orientation angle, and the grain boundary energy is related to the misorientation angle of the adjacent grains.
Global Composites Experts Webinar by Ken L Reifsnider
Title: Direct coupling predicting the strength and life of fiberous composite laminates
Speaker: Dr. Ken L Reifsnider
Time: 10/8, 11AM-12PM EST.
Please go to https://www.purdue.edu/cmsc/events/2020-webinars/ to register for this talk.
Using Thermodynamic State Index axis for Battery Aging
There is a new paper in predicting battery aging without testing based empirical models. "Entropy generation model to estimate battery aging"
https://www.sciencedirect.com/science/article/abs/pii/S2352152X20315772…
https://www.linkedin.com/feed/update/urn:li:activity:671384407290732134…
A new planner BCN lateral heterostructure with outstanding strength and defect-mediated superior semiconducting to conducting properties
Motivated by the recent synthesis of boron-carbon-nitride (BCN) monolayers with different atomic compositions, we propose a novel planar BCN lateral heterostructure with a combination of graphene and hexagonal boron nitride (h-BN) counterparts. Density functional theory (DFT) and classical molecular dynamics (CMD) simulations are integrated to examine the effects of defects (vacancy and Stone-Wales (SW) defects) and temperature on the physical properties of the BCN heterostructure.
Post-doctoral research associate and Graduate student openings
A postdoctoral and graduate student openings with the main focus on the mechanics of composites materials are available immediately in Shakiba's group. We are looking for strongly motivated candidates to work on an AFOSR supported project on 1) thermo-mechanical damage coupling in FRPs, 2) simulation of additively manufactured composites and 3) sensitivity and machine learning for damage predictions.
EML Webinar by Prof. Marc Geers on September 23, 2020: Multi-scale homogenization of materials with an emergent macroscopic behaviour
EML Webinar on 23 September 2020 will be given by Marc Geers, Eindhoven University of Technology, Discussion leader: Laurence Brassart, Oxford University.
Title: Title: Multi-scale homogenization of materials with an emergent macroscopic behaviour
Time: 7 am California, 10 am Boston, 3 pm London, 10 pm Beijing on 23 September 2020
Effect of surface topography on anisotropic friction of graphene layers
Tribological behavior of graphene layers has been a focus of intensive research interest since its crystal lattice structure can be exploited to achieve incommensurate contact, leading to nearly zero friction, namely structural superlubricity. However, wrinkling undulations are omnipresent on graphene and difficult to be completely eliminated, which inevitably resists superlubricity in reality. Here, we explore how the presence of surface wrinkles affects nanotribological behavior of graphene sliding systems.
The Anelastic Ericksen Problem: Universal Deformations and Universal Eigenstrains in Incompressible Nonlinear Anelasticity
Ericksen's problem consists of determining all equilibrium deformations that can be sustained solely by the application of boundary tractions for an arbitrary incompressible isotropic hyperelastic material whose stress-free configuration is geometrically flat. We generalize this by first, using a geometric formulation of this problem to show that all the known universal solutions are symmetric with respect to Lie subgroups of the special Euclidean group. Second, we extend this problem to its anelastic version, where the stress-free configuration of the body is a Riemannian manifold.
Special Issue "Advances in Elastic Micro-Structured Systems and Metamaterials"
The Special Issue "Advances in Elastic Micro-Structured Systems and Metamaterials", that will be published in Applied Sciences (Impact Factor: 2.474), is open to receive submissions for peer-review and possible publication.
The aims and scope can be found at the following link:
https://www.mdpi.com/journal/applsci/special_issues/elastic_micro_struc…