Hi everyone!
I wonder how one could implement specific relaxation material model to simulate stress change over time in Abaqus. The model itself looks like follows:
stress(t)=C1 * strain * timeC2 * exp(-C3/T)
C1, C2, C3 are known constants. I guess writing CREEP subroutine could help, but...
Hi, FEA way! Thanks for the response!
I probably should have described it earlier, my bad, but the main principle of this device is to damp oscillations by conversion the kinetic energy of cylinder metal parts motion into thermal energy of the liquid. Does Abaqus/Explicit procedure with ALE /...
Hi everyone!
Could you please help me understand the proper way of calculating viscous damping coefficients for a set of frequencies? The core of the design consists of a cylinder filled with a viscous fluid, one side of which is subjected to excitation at a given frequency. For now I have no...
Hi everyone!
I would like to postprocess some nodal sets using python in Abaqus and now I'm stumped on this one. What I need is to extract nodal coordinates for every selected set in deformed state for the last frame of selected step. It could be any sort of array to be processed or output in...
FEA way, thank you for quick reply!
I guess the problem is more complex. I can get nodes coordinates by many ways, and in my opinion after that the tricky part begins. For example I have set of nodes which belonged to circular plane cross section before deformation. After deformation these...
Hi everyone!
I have a model of tube forming operation using Abaqus/Explicit and I need to evaluate two geometrical parameters of processed tube:
1. Ovality of tube cross-section, which requires measurement of minimum and maximum diameter of the machined tube;
2. Curvature of tube's...
Yes, this approach is absolutely clear and straightforward and I usually build models starting from very simple cases.
But I'm telling about combining two analyses, how can I conduct thermal and hygroscopic analyses simultaneously? You can not add more than one thermal expansion coefficient at...
Thanks everybody for replying!
I've found this workaround but what if I need to analyze both thermal and hygroscopic effects simultaneously?
And how should I interpret thermal loads and BCs in hygroscopic analysis? I'm familiar with thermal analysis, but not with hygroscopic one.
Hi everyone!
I want to know how to model hygroscopic stress and strain in Abaqus in case of fiber reinforced composites. I've found moisture swelling model in Abaqus documentation but I'm not sure if it is what I need.
The case is the following:
Structure is made primarily of fiber reinforced...
FEA way, thank you!
But what if in my real problem torque loading leads to non-convergence? Is there any other options? I know that prescribed translation/rotation gives better convergence that equivalent force/torque, so I used this approach.
Hi everyone!
I'm trying to get dynamic stiffness for cylindrical part with blind hole and could not get any result (all requested data have zero values).
The scenario is the following:
Clamp from one side, Reference Point with coupling from the other side (fix U1,U2,U3,UR1,UR2, free UR3)...
Hi everyone!
I'm trying to calculate natural frequencies of assembly containing hyperelastic parts under load.
Due to complex contact conditions and high deformations Abaqus/Standard tends to diverge analysis and I've calculated stress state of this structure in Abaqus/Explicit. I know that...
Thanks, FEA way!
This article's authors refer to hyperelastic material fail under tension or shear strain. Is it correct to state that there is no fail of rubber under compression?
Best regards
Hi everyone!
I was wondering if there is a simple way to estimate rubber part is exposed to failure or not.
For example if I have some hyperelasticity model coefficients ( Marlow, Yeoh, Ogden or any else) and I've finished FE-calculation of structure including rubber parts, how can I check if...
