@article {306, title = {Discussion: Strength-to-fracture scaling in scratching}, journal = {Engineering Fracture Mechanics}, volume = {119}, year = {2014}, month = {Mar-2014}, pages = {21 - 28}, abstract = {

In their paper, Lin and Zhou (2013) add a new dimension to the scratch test analysis, challenging the applicability of Linear Elastic Fracture Mechanics to scratch tests. The question raised is how to integrate the three-dimensionality of scratch tests into the energetic Size Effect Law (SEL) formulated by Ba{\v z}ant for quasi-brittle materials. We show that Lin and Zhou\’s analysis, although relevant is incomplete, as it neglects the blade width, which is critical for the fracture property assessment. In return, if the blade width is properly taken into account, the SEL here proposed is a formidable means to ascertain the fracture toughness from scratching.

Fig. 1. Description of macroscopic scratch tests

Fig. 2. Influence of cutter width w on the intrinsic specific energy ε and the{\textellipsis}

Fig. 3. Strength scaling of scratch tests for different geometries (straight vs

Fig. 4. (a) Presence of a horizontal propagating crack during scratch testing{\textellipsis}

Fig. 5. Application of Ba{\v z}ant{\textquoteright}s Size Effect Law to scratch tests for different{\textellipsis}

}, issn = {00137944}, doi = {10.1016/j.engfracmech.2014.02.025}, author = {Ange-Therese Akono and Franz-Josef Ulm and Zden{\v e}k P Ba{\v z}ant} }