Blog posts
Newmark scheme beta and gamma parameters
Hi,
Concerning the Newmark method with central difference for an explicit resolution I want to know where the parameters beta and gamma come from ?
I have found this :
http://www.stanford.edu/group/frg/course_work/AA242B/CA-AA242B-Ch7.pdf
but how do these parameters appear ?
Using RADIOSS, the theory manual says the remainder of the taylor's series is computed using numerical integration but I don't know which rule is used.
Immediate opening for a Ph.D. student in computational mechanics and materials at Missouri University of Science and Technology
There is an immediate opening for a Ph.D. student in the Department of Materials Science and Engineering at Missouri University of Science and Technology (Missouri S&T - formerly University of Missouri-Rolla). The Metallurgical Engineering program at Missouri S&T is one of the largest and most respected in the U.S. (http://mse.mst.edu).
The Ph.D. research project is about developing a coupled phase-field crystal plasticity model for predicting stress-strain-microstructures relations during deformation.
stress relaxation- doubt
Attached herewith a classical paper by Hart on introducing a concept of constant hardness curves refuting that absolute strain should not be considered as a state variable.
The interesting part is he uses a stress relaxation test to prove the same. Stress relaxation test, here refers to a tensile test, where the test is stopped after say certain amount of plastic deformation. The stress drops a little, but the total strain is constant. However, it is argued that there is a small inelastic deformation, which is the cause of this load or stress drop.
New book on "Damage and Failure of Composite Materials"
New book on Damage and Failure in Composite Materials written by Prof. Ramesh Talreja (Texas A&M Univ.) and Prof. Chandra Veer Singh (Univ. of Toronto)
Publishers: Cambridge University Press.
1 PhD student position for biophysics and tribology of mucin/mucus gels
1 PhD student position is open in the Department of Mechanical Engineering (MEK), Technical University of Denmark (DTU).
Fracture and debonding in lithium-ion batteries with electrodes of hollow core-shell nanostructures
In a novel design of lithium-ion batteries, hollow electrode particles coated with stiff shells are used to mitigate mechanical and chemical degradation. In particular, silicon anodes of such core-shell nanostructures have been cycled thousands of times with little capacity fading. To reduce weight and to facilitate lithium diffusion, the shell should be thin. However, to avert fracture and debonding from the core, the shell must be sufficiently thick.