research
Evading the strength-ductility trade-off dilemma in steel through gradient hierarchical nanotwins
It is a long-standing goal in metallurgy to enhance the strength of materials without sacrificing ductility. In a recent article in Nature Communications, we reported an effective way to evade the strength-ductility trade-off dilemma in twin-induced plasticity steel.
Rolling Ball
Hi,
Please refer to the figure given below. I want model this problem using ABAQUS.
Abaqus deep drawing a square plate
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I am trying to do deep drawing in ABAQUS. While to do this, I'm getting help
to ABAQUS examples which is name Deep Drawing a Square Box. In my model
looks everything is ok. But my punch reaction force is very low. In addition
I did this model experiment in our laboratory. For example my model max
punch force 4000 N but in experiment real punch force for same material
nearly 12000 N. My model link is below:
UMAT and UEXPAN subroutines
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I am having problems in writing the umat and uexpan subroutines applicable to the creep model defined in
http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000375
Has anybody written the algorithm?
Professors Markus Buehler, Katia Bertoldi and Oscar Lopez-Pamies will receive the Journal of Applied Mechanics Award in 2014
Prof. Markus Buehler from MIT will receive the 2014 Journal of Applied Mechanics Award for his paper "Bioinspired graphene nanogut" (Journal of Applied Mechanics, v 80, article 061009, 2013). Profs. Katia Bertoldi from Harvard University and Oscar Lopez-Pamies from University of Illinois will also receive the 2014 Journal of Applied Mechanics Award for their paper "Some remarks on the effect of interphases on the mechanical response and stability of fiber-reinforced elastomers" (Journal of Applied Mechanics, v 79, article 031023, 2012).
Pressure vessel deflection
Hi,
I have observed in many cases that horizontal pressure vessel with saddle support due to the internal pressure gets circumferentially compressed (vertical deflection).
Can anyone expalin why it behaves so.
Attached is the pic showing the pressure vessel.
Regards,
Sagar
non linear buckling analysis using ansys- composite plate
HI FRIENDS.
I AM WORKING ON NON LINEAR BUCKLING ANALYSIS PF COMPOSITE PLATE USING ANSYS SOFTWARE.I HAVE GIVEN GEOMETRIC IMPERFECTION USING FIRST BUCKLING MODE SHAPE.DID A NON LINEAR DISPLACEMENT CONTROLLED ANALYSIS.PROGRAM IS TERMINATING WHEN PROGRAM IS RUNNING.CAN ANYBODY HELP PLS. I WANT LOAD DISPLACEMENT CURVE .I AM WORKING ON COMPOSITE FLAT PLATE.
REGARDS
LAKSHMI NARAYANA