An evaluation of the loading condition on mixed-mode stress intensity factors for CTST specimens made of 2024-T351 aluminum alloy

A novel test specimen for mixed mode I/II/III fracture study in brittle materials

“…In the study carried out by Razavi and Berto, 30 a less discrepancy between the results of experiments and theory (Richard criterion) is reported under pure mode II. This is while pure mode II fracture test was not included in the paper published by Khattamanesh et al, 33 on the other hand, a deviation between experiments and the Richard criterion is observed in the former study 30 under pure mode III and mixed modes I/III and I/II/III loading. However, an excellent agreement exists between the results of the experiments and the MPS and Richard criteria in the latter study 33 in the case of pure mode III, while there is a deviation in the case of mixed modes I/III and I/II/III loading conditions.…”

“…This is while pure mode II fracture test was not included in the paper published by Khattamanesh et al, 33 on the other hand, a deviation between experiments and the Richard criterion is observed in the former study 30 under pure mode III and mixed modes I/III and I/II/III loading. However, an excellent agreement exists between the results of the experiments and the MPS and Richard criteria in the latter study 33 in the case of pure mode III, while there is a deviation in the case of mixed modes I/III and I/II/III loading conditions. It is also reported in the latter study that the MPS and Richard criteria have a close prediction for the entire domain of mixed mode I/II/III loading while the Pook criterion worked well only in the case of mixed mode I/II.…”

“…Mixed mode I/II/III loading conditions can also be generated by using complicated loading fixtures together with simple cracked specimens. [27][28][29][30][31][32][33] A noticeable advantage of some of the loading fixtures is the wide range of mixed-mode I/II/III cases that can be obtained via using them. [30][31][32][33] Razavi and Berto 30 proposed a new loading fixture that includes two separate fixture parts to test the mixed-mode fracture on CTS (compact tension shear) specimens made of PMMA.…”

“…[27][28][29][30][31][32][33] A noticeable advantage of some of the loading fixtures is the wide range of mixed-mode I/II/III cases that can be obtained via using them. [30][31][32][33] Razavi and Berto 30 proposed a new loading fixture that includes two separate fixture parts to test the mixed-mode fracture on CTS (compact tension shear) specimens made of PMMA. In two sequential studies, Ayhan and Demir 31 and Demir et al 32 proposed a special loading apparatus utilizing CTST (compact tension-shearing and tearing) specimens, and they claimed that all possible mixed mode conditions can be achieved.…”

“…In two sequential studies, Ayhan and Demir 31 and Demir et al 32 proposed a special loading apparatus utilizing CTST (compact tension-shearing and tearing) specimens, and they claimed that all possible mixed mode conditions can be achieved. The latest study in this regard was carried out by Khatammanesh et al, 33 where they proposed a new loading setup to investigate the mixed mode I/II/III fracture on CTST specimens made of aluminum alloy. However, the creation of a crack precisely inclined in two different planes and also the fabrication of complicated test fixtures both have their own complexity and significant cost.…”