Blog posts
Cohesive element modelling problem in ABAQUS
Dear All,
I am modelling a 3 point bend specimen with Cohesive elements tied to the upper and lower halves of the specimen in 2d.
The problem is that the CZ elements perform properly only for a combination of element sizes, i.e. a combination of element size of structure and CZ elements, for instance in my case the structure/specimen element size is 0.2mm and CZ is 0.001 or 0.002. For any other combination the adjacent elements bend as shown in the attached image.
I will be glad if someone could explain this behaviour and the solution.
Fast-Response, Stiffness-Tunable Soft Actuator by Hybrid Multimaterial 3D Printing
ttps://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201806698
Fast‐Response, Stiffness‐Tunable Soft Actuator by Hybrid Multimaterial 3D Printing
Yuan-Fang Zhang, Ningbin Zhang, Hardik Hingorani, Ningyuan Ding, Dong Wang, Chao Yuan, Biao Zhang, Guoying Gu,* and Qi Ge*
Steady-state fracture toughness of elastic-plastic solids: Isotropic versus kinematic hardening
I hope some of you may find this work interesting. We show that kinematic hardening effects play a significant role in monotonic/static fracture.
Steady-state fracture toughness of elastic-plastic solids: Isotropic versus kinematic hardening
K.J.Juul, E.Martínez-Pañeda, K.L.Nielsen, C.F.Niordson
Engineering Fracture Mechanics, 207, pp. 254-268 (2019)
Volume 207, 15 February 2019, Pages 254-268
Fully Funded Ph.D. Position
January 18th 2018
A fully-funded Ph.D. position is available in the Mechanical and Aerospace Engineering Department at the University of Alabama in Huntsville with a starting date of August 2019. The focus of the project is on flow separation control. Our research integrates wind tunnel testing and advanced experimental fluid dynamic techniques such as particle image velocimetry (PIV) to investigate the flow structures and apply more effectively flow control techniques for aerospace and wind energy applications.
Nonlinear elasticity of incompatible surface growth
In this manuscript with Lev Truskinovsky, we developed a new nonlinear theory of large-strain incompatible surface growth. Surface growth is a crucial component of many natural and artificial processes from cell proliferation to additive manufacturing. In elastic systems, surface growth is usually accompanied by the development of geometrical incompatibility leading to residual stresses and triggering various instabilities. Here we developed a nonlinear theory of incompatible surface growth which quantitatively linkes deposition protocols with post-growth states of stress.
Need Help regarding UMAT subrouitne
It's been 2 weeks, I strated to use abaqus and user subrouitnes. To understand the how user subroutine work I thought to run some UMAT which I got it from http://imechanica.org/files/Writing%20User%20Subroutines%20with%20ABAQUS.pdf (page no- L6.73) to analysis a 3d steel plate with the material property which is given below.
Designing Highly Stretchable Kirigami Using Machine Learning
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.255304
Accelerated Search and Design of Stretchable Graphene Kirigami Using Machine Learning
P.Z. Hanakata, E.D. Cubuk, D.K. Campbell and H.S. Park
Damage Mechanics Challenge Workshop
Damage Mechanic Challenge
The purpose of the conference is to gather computational scientist and experimentalist to define and launch a numerical challenge to predict damage evolution and signatures of failure in brittle material. At the workshop, participants are invited to
(1) present their computational approach for numerical simulation of damage;
Strain Engineering of 2D Materials: Issues and Opportunities at the Interface
In this progress report, we reviewed recent advances in strategies for applying mechanical strain into 2D materials and recent state‐of‐the‐art characterizations of interface mechanics for 2D material–substrate systems.