Thank you Dr. Wagner... best wishes for you and your family

great explanation Dr. wagner. Thank You

Hello Dr. Wagner ,thank you for this video

Very informative video. Thank you, Dr. Wagner.

@gideonlyngdoh3538

2 жыл бұрын

I have a question, if we control the strain rate by changing the assigned displacement and the time period, does it matter whether we use dynamic or static steps?

@hnrwagner

2 жыл бұрын

@@gideonlyngdoh3538 depends on the type of the analysis, I have at the moment an analysis of a thick composite tube under axial compression. If i change the displacement (strain rate), the stiffness of the model changes (in the load-displacement curve, slope of the curve) in a dynamic explicit analysis, but not in a static analysis.

an interesting lesson thank you very much

@hnrwagner

2 жыл бұрын

thanks, more is to come, for example stress triaxiality

Timecodes: 0:00 - Intro 0:11 - Strain 0:44 - How to ? Stress-Strain Curve 1:33 - Strain Rate and Examples 2:21 - How to determine Strain Rate - Example 1 - Strain vs. Time 2:48 - How to determine Strain Rate - Example 2 - Tensile Test 3:27 - How to determine Strain Rate - Example 3 - ABAQUS 4:02 - Influence of Strain Rate on Stress-Strain Behavior 4:55 - Comparison: Tensile Test with different Strain Rates 5:28 - How prepare Strain Rate data for ABAQUS CAE 5:40 - Fracture Strain for different Strain rates

Dear Dr. Wagner I hope everything is going well with you. Thank you for your informative and comprehensive videos. I have a question; could we calculate the strain rate from the machining process like the proposed video? based on RF and U of nodal displacement of a single element in the chips? or is it possible to activate one of the field outputs like PE or LE or NE to get the strain-time graph? Thank you for your help and time.

Thank you very much for the video, Dr. Wagner. As always, it Washington a great explanation!. One question, what would be the procedure to introduce material softening/degradation/bauschinger effect under cyclic loading?. Thanks in advance for your answer!! Regards!

Hello, Dr. Wagner, I really want to know how to define stress triaxiality. Could you make a video to explain it

@youchunxu6305

2 жыл бұрын

Your videos have been very helpful to me. Thank you!

@hnrwagner

2 жыл бұрын

Will be the next video

I have a question about the stress triaxiality when you set 0 and when you set 1/3 for uniaxial tension

@hnrwagner

Ай бұрын

it only works if you have at least two values, so only 0 or only 1/3 makes no difference

I was thinking that a true stress vs true strain curve is always increasing.

@hnrwagner

Жыл бұрын

that correct, the equation for true stress may only be considered valid after Ultimate stress value from engineering stress.

strain 0.000154128 tensile strength as 1.37874 MPa this is the tensile data i obtained performing test on gfrp composite i dont know why i am getting so leeser value material properties are: E11=8943.066, E22=8941.682, E33=41396.052 and one more thing is that during experiment i have applied strain rate of 1mm/min but in abaqus i feed load as a velocity of 1/60 mm/sec is is okay

@hnrwagner

Жыл бұрын

I do not understand your problem, can you rephrase it?

@narendrakumarjharesearchsc5159

Жыл бұрын

@@hnrwagner Abaqus 3D solid modeling of polymer composite materials for tensile test ..........during experiment i have applied load as 1mm/min........so the same load how to apply in abaqus.......please say

How is the fracture strain determined? Why is it not the strain at the end of the stress-strain curve?

@hnrwagner

4 ай бұрын

here you can see the determination of the fracture strain: kzread.info/dash/bejne/moqIxsqgkbTQqc4.htmlsi=TZ1kI-0tmAifQGap the definition of it is described in the ABAQUS USER MANUAL, the fracture strain is the strain where damage initiation starts

@user-ni8rq6cu7t

4 ай бұрын

@@hnrwagner thank you! also, do you have a link for the ABAQUS USER MANUAL? I'm trying to find the definition for 'Displacement at Failure' in the Damage Evolution subsection, and how to obtain it.

@hnrwagner

4 ай бұрын

@@user-ni8rq6cu7t Displacement at failure is also shown in the video, its Fracture Strain multiplied with the gauge length of a tensile test specimen. ABAQUS User Manual: classes.engineering.wustl.edu/2009/spring/mase5513/abaqus/docs/v6.6/index.html