Recent literature suggests that nano-twinned materials posses both high strength and ductility. Such unusual properties have been attributed to the unique ability of coherent twin boundaries in affecting dislocation slip transfer mechanisms unlike other types of grain boundaries of lesser symmetry. A combination of experimental and theoretical studies is presented to rationalize the macroscale attributes of nano-twinned NiCo alloys of four different compositions (please see the attached pdf below for the paper).
A new perspective on model reduction for nonlinear multi-scale analysis of heterogeneous materials. In this work, we seek meaningful low-dimensional structures hidden in high-dimensional multi-scale data.
Recently, unusually high detachment rates of a myosin from actin were reported with a force spectroscopy technique. Here, we show that these high rates may be due to the coupling between bond breaking and state transition. Based on a kinetic model for single myosin, rates of bond breaking between myosin and actin at different nucleotide states are systematically extracted for the first time. Our results clearly indicate that myosins may adopt much higher transition rates than bond breaking rates at different nucleotide states at relatively low forces.
Hello all,
I am trying to write damage model using isotropic hardening given in Abaqus example. But in VUHARD section some table is given like "syield=table(1, nvalue)" and eqpl1=table(2,k1+1). I dont understand what does it mean and where to put these values? If anyone can explain, it will be a great help.
Thanks
Abhishek
The presence of nano-sized coherent precipitates is well known to have crucial impact on the mechanical behaviors of a broad class of shape memory alloys. The local stress gradient at the matrix-precipitate interface is predicted as induced by inter-lattice atomic disregistry. Due to the presence of the local disturbance fields, the preference for activating different martensitic variants, given the uni-directionality thereof, is influenced substantially.
Hello all,
Can anyone please tell me that how can I see subroutine requested output in ABAQUS odb display? I am able to print some results in .log file but I want to see results in odb display. Is it possible?
Thanks in advance
Abhishek
Hello everybody,
My task is to write a UMAT for Non-linear Viscoelasicity based on Schapery's model in ABAQUS. I have coded the routine, but I am still not able to predict correct response. I tried to debug it as much as I can. I understand that it would be difficult for anybody to understand my code. So, I have attached a flowchart (pdf) of the whole algorithm that I follow. It would be nice if you could check that and correct me if I am wrong.
Thanks in advance for your time and consideration
Dear All,
I want to do some single element tests for a plane stress quadratic element with bi-linear shape functions(like the plane 42 element in ANSYS).
What I am not sure about is what boundary conditions should be applied to the single element in this case. I also want to apply a prescribed displacement as the loading. (I would like to first try to do these single element simulations in Ansys and then with my own developed codes, hopefully the results will conform, as sort of a basic validation of my own developed code)
We develop a microstructure-based model to characterize and model failure initiation in DP steels using an extended finite element method (XFEM) to simulate martensite cracking on the mesoscale combined with representative volume element (RVE) modeling. A mini tensile test with digital image correlation (DIC) analysis is linked to local SEM analysis to identify the local strain at which failure is initiated.
