Amazing how some really good classes as this can have so few views and feedback. There is some real good information here that is hard to find anywhere else. Too bad that the TH-cam Subtitles doesn't work properly so I have struggled to understand some words.
This may be long overdue. But here it goes. Here he is considering deformation under constant strain, which implies that the strain energy decreases as the crack grows. This is mentioned in detail in the previous lecture under constant displacement approach. Hence, Ua is negative. As a result, net change in energy is Us (increase due to surface energy) - Ua (decrease due constant strain condition). Hope this helps :)
This is such a good class!! I am so fortunate to listen to Prof. Ramesh's teaching, which greatly helped me understanding fracture mechanics concepts!
Great Explanation Congratulations Prof Ramesh.
What Luiz said. This is a great help, thank you.
Amazing how some really good classes as this can have so few views and feedback. There is some real good information here that is hard to find anywhere else. Too bad that the TH-cam Subtitles doesn't work properly so I have struggled to understand some words.
why not for ductile materials ?
time 18:28: the plot is for -Ua (not the +Ua written there) and so Ut = Us - Ua . Can anyone give more explanations about that ?
This may be long overdue. But here it goes. Here he is considering deformation under constant strain, which implies that the strain energy decreases as the crack grows. This is mentioned in detail in the previous lecture under constant displacement approach. Hence, Ua is negative. As a result, net change in energy is Us (increase due to surface energy) - Ua (decrease due constant strain condition). Hope this helps :)
10:50 take a cycle Tyre for example just could not stop me laugh.Beautiful sir ! Love your lecture sir,very very detailed and very cool explanations.
Griffith is the man