Hello
what do think why investigators await about 3 decades to calculation of local stress/strain by elastic-plastic fracture mechanics?and basically why elber's discovery[crack closure] was so important and play a key role in numerous articles?
How can i calcualtion the amount of load transfer through the contacting crack faces?
How can i determine the location of it?
Thank you
Hadi
measurment of FCG based on crack tip closure concept depend on :
1- experimental technique
2-location of the measurement
3- mean stress effect on FG at high stress ratio can not be explained by the closure model due to the absense of the crack closure at high loads.
Two question can be investigated as follows:
1- why crack tip closure is popular and it widely use in hightech industry like aircraft industry acording to overwiew of scentific articles.?
Thank you for all of quick response. Yes, I need a calculation method as long as good agreement with measurment methohs.Generalization will be important in which method we choose espesially in calculation of stress field.
It seems that the measurment of local stress and strain in fatigue crack tip will be difficult. some researcher use F.E analysis method,in contrary using of numerical solution. however analytical method also has investigated. what method you can imagine? i need a brain storm in this issue.
Thank you
Hadi