abc123ali
Mechanical
- Nov 6, 2023
- 86
Respected ABAQUS Users, I want to ask about the experimental input for the cohesive zone modelling debonding of single lap joint during the shear test. Here I have an experimental input for some cohesive debonding force displacement curve and have several questions?
1. During the cohesive zone experimental output results reveals there is change in slope in one figure and the other elastic constant or slope same till the peak force? why. If the experimental result have many slopes which one should consider as and input parameter? or change of slope indicate yielding but here the slope increases rather than decreasing as in normal yielding case.
2. Is it common to have no yielding in the lap joints force-disp and stress-strain curve as in the given experimental results there is no yielding till ultimate stress uts? why?
3. According to the tutorial on the youtube. He uses the stress strain curve of the adhesive separately and the whole tension sample is made of adhesive and not applied the adhesive to make the lap joint. After getting the stress-strain curve of cured adhesive he converted to stress displacement and the input to the ABAQUS CZM model parameters which I think must be different to the output when stress-strain experiment test of the lap joint using that adhesive is done rather than making the dumbell specimen of the adhesive and converted to stress-disp and then use as the input for CZM ABAQUS! How do you suggest it?
4. what should be modified to have the yielding of the lap joint shear or tension CZM model in ABAQUS and compatible experiment to have a yielding.
5. Is it possible to have significant yielding during the loading to the adhesive joint?
The files and the youtube link is attached.
Thanks for cooperation
1. During the cohesive zone experimental output results reveals there is change in slope in one figure and the other elastic constant or slope same till the peak force? why. If the experimental result have many slopes which one should consider as and input parameter? or change of slope indicate yielding but here the slope increases rather than decreasing as in normal yielding case.
2. Is it common to have no yielding in the lap joints force-disp and stress-strain curve as in the given experimental results there is no yielding till ultimate stress uts? why?
3. According to the tutorial on the youtube. He uses the stress strain curve of the adhesive separately and the whole tension sample is made of adhesive and not applied the adhesive to make the lap joint. After getting the stress-strain curve of cured adhesive he converted to stress displacement and the input to the ABAQUS CZM model parameters which I think must be different to the output when stress-strain experiment test of the lap joint using that adhesive is done rather than making the dumbell specimen of the adhesive and converted to stress-disp and then use as the input for CZM ABAQUS! How do you suggest it?
4. what should be modified to have the yielding of the lap joint shear or tension CZM model in ABAQUS and compatible experiment to have a yielding.
5. Is it possible to have significant yielding during the loading to the adhesive joint?
The files and the youtube link is attached.
Thanks for cooperation