Mixed-mode fracture of compacted tailing soils. II: Crack properties from full-field displacement fields. (April 2023)

• Record Type: Journal Article
• Authors: Zhang, Nan; Hedayat, Ahmadreza; Bolaños Sosa, Héctor Gelber; Tupa, Néstor; Yanqui Morales, Isaac
• Is Part Of: Theoretical and applied fracture mechanics. Volume 124(2023)
• Publication Date: 2023-04
• Subjects: Compacted tailing soils -- Asymmetric semi-circular bending tests -- Digital image correlation -- Mixed mode I/II fracture properties -- Silty sandy soil; Fracture mechanics -- Periodicals; 620.1126
• DOI: 10.1016/j.tafmec.2022.103707
• Languages: English
• ISSNs: 0167-8442

Abstract

Abstract: This paper deals with the acquisition of the crack evolution and propagation behaviors of the compacted tailing soils from full-field displacement fields by incorporating two-dimensional optical technique-digital image correlation (2D DIC). Meanwhile, the fracture properties, such as mode I+II fracture toughness were also measured and compared to the results obtained in Part I. Cracking properties, such as strain energy rate, cracking initiation angle, and size of critical distance were investigated from the perspective of full-field displacement field and compared to the classic fracture mechanics. It is more intuitive to recognize the mixed mode fracture properties of the compacted tailing soils under asymmetric loading conditions by using optical techniques in full-field displacement fields. This work largely enriched the database of the fracturing properties of compacted tailings soils. Highlights: Mixed mode fracture behaviors of the CTS were obtained from displacement field. Fracture toughness of the CTS obtained from 2D DIC were introduced. The crack properties of the CTS were obtained by using 2D DIC technique. Strain behavior and crack initiation angle of the ASCB specimens were examined.