Mixed mode fracture of marble/adhesive interfaces

Rahbar, Nima; Jorjani, M.; Riccardelli, Carolyn; Wheeler, George; Yakub, I.; Tan, Ting; Soboyejo, W. O.

doi:10.1016/j.msea.2010.04.029

Cited by 37 publications

(4 citation statements)

References 13 publications

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“…In this study, this trend of behavior was observed for all groups and conditions, except for the control group after aging. This increase as a function of mode-mixity is mainly attributed to the presence of surface forces that inhibit the sliding of the surface cracks (Rahbar et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Silica-Based Infiltrations for Enhanced Zirconia-Resin Interface Toughness

et al. 2019

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Novel silica-based infiltrations on the surface of zirconia have the potential to improve their bondability, allowing for the etching/silane adhesive bonding technique. Nonetheless, adhesively bonded joints are subject to mixed tensile and shear stresses when the restoration is in occlusal service. Thus, we aimed to investigate the effect of 2 novel silica-based infiltrations on the interfacial toughness of adhesively bonded zirconia using the Brazil nut method, which allows for controlled types of stresses to be applied at the interfaces. In total, 150 3Y-TZP (In-Ceram YZ; Vita) Brazil nuts were machined and randomly assigned to 3 groups: C, control (air abraded); SG, sol-gel silica infiltration; and GI, glass infiltration. SG specimens were immersed twice in silicic acid for 20 min and dried (100°C, 1 h). GI specimens were presintered (1,400°C, 1 h) before a glass powder slurry was applied to the intaglio surface. All specimens were then sintered (1,530°C, 2 h). Following adhesive bonding (Panavia F 2.0, Kuraray) and water storage (37°C) for 10 d, the Brazil nuts were subdivided into groups baseline and aged (40,000 thermal cycles between 5°C and 55°C, with a dwell time of 30 s). The Brazil nuts were subjected to axial-loading tests using various inclinations (precrack angle with load direction): Θ = 0°, 5°, 10°, 15°, or 25°, which define the stress type at the interface, from pure tension (0°) to increasing levels of shear. Under pure tension (0°), GI yielded superior interfacial fracture energy, SG and C were similar, and aging had no effect. Under predominantly shear stresses (25°), aging significantly decreased interfacial fracture energy of C and SG, while GI remained stable and was superior. The glass infiltration of the zirconia intaglio surface increases its adhesive bonding interfacial toughness. The sol-gel silica infiltration method requires improvement to obtain a homogeneous surface infiltration and an enhanced bond strength.

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Section: Discussionmentioning

confidence: 99%

Silica-Based Infiltrations for Enhanced Zirconia-Resin Interface Toughness

et al. 2019

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“…Thus, torsion was capable of successfully attacking the Achilles heel of nacre, i.e., interfaces between tablets. For most tests in prior studies, the crack directions were more or less parallel to the siding directions, ,,,− i.e., mode II cracks. − However, the crack directions were perpendicular to the sliding direction in torsion (Figure ), i.e., mode III cracks. − In addition, large stress gradients along the radius drove the cracks so quickly that there was little chance to trigger microscale toughening mechanisms resulting from tablet sliding. ,,, …”

Section: Experiments On the Interfacial Mechanical Behavior Of Nacrementioning

confidence: 99%

Interfacial Mechanical Behavior in Nacre of Red Abalone and Other Shells: A Review

Alghamdi

Yang

et al. 2022

ACS Biomater. Sci. Eng.

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Interfaces between nacreous tablets are crucial to the outstanding mechanical properties of nacre in natural shells. Excellent research has been conducted to probe the effect of interfaces on strength and toughness of nacre, providing critical guidelines for the design of human-made laminated composites. This article reviews recent studies on interfacial mechanical behavior of nacre in red abalone and other shells, including experimental methods, analytical and numerical modeling. The discussions focus on the mechanical properties of dry and hydrated nacreous microstructures. The review concludes with discussions on representative studies of nacre-like composites with interfaces tuned using multiple approaches, and provides an outlook on improving the performance of composites with better interfacial controls.

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“…A Hysitron TriboIndenter Ò (Hysitron, Minneapolis, MN, USA) was used to measure the elastic moduli of cortical and trabecular bones through nanoindentations [27,28], in which specimens with the same thickness were used. A Berkovich diamond tip, i.e., a three-sided pyramid with the angle of 142.3°and the radius of $150 nm, was used to indent the bone specimens.…”

Section: Nanoindentationmentioning

confidence: 99%

Compressive deformation and failure of trabecular structures in a turtle shell

Ampaw

Owoseni

et al. 2019

Acta Biomaterialia

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Turtle shells comprising of cortical and trabecular bones exhibit intriguing mechanical properties. In this work, compression tests were performed using specimens made from the carapace of Kinixys erosa turtle. A combination of imaging techniques and mechanical testing were employed to examine the responses of hierarchical microstructures of turtle shell under compression. Finite element models produced from microCT-scanned microstructures and analytical foam structure models were then used to elucidate local responses of trabecular bones deformed under compression. The results reveal the contributions from micro-strut bending and stress concentrations to the fractural mechanisms of trabecular bone structures. The porous structures of turtle shells could be an excellent prototype for the bioinspired design of deformation-resistant structures.

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Mixed mode fracture of marble/adhesive interfaces

Cited by 37 publications

References 13 publications

Silica-Based Infiltrations for Enhanced Zirconia-Resin Interface Toughness

Silica-Based Infiltrations for Enhanced Zirconia-Resin Interface Toughness

Interfacial Mechanical Behavior in Nacre of Red Abalone and Other Shells: A Review

Compressive deformation and failure of trabecular structures in a turtle shell

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