About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Late News Poster Session
|
Presentation Title |
Extrinsic Size Effects on Fracture Behaviour of Copper |
Author(s) |
Hrushikesh Sahasrabuddhe, Anirban Patra, Nagamani Jaya Balila |
On-Site Speaker (Planned) |
Hrushikesh Sahasrabuddhe |
Abstract Scope |
Size effects are well known to influence the mechanical behaviour of materials. While literature exists on size effects (extrinsic v/s intrinsic) on strength, the effect of extrinsic specimen size effects on fracture is not well quantified. The objective of the present study is to elucidate the influence of specimen thickness on the plane stress fracture toughness (Jc) of materials under elastic-plastic domain.
Hot-rolled Cu sheets of constant grain size and changing thickness are tested using single edge notch tension (SENT) geometry. The relevant non-dimensional factors for the same are derived from numerical simulations by inputting the exact stress-strain response for each thickness. Experimental quantification of Jc is made using CTOD and the load-unload techniques for increasing surface area to volume ratios. Jc obtained from both techniques show a significant dependence on the extrinsic dimension which is explained through a dislocation exhaustion model. |