Experimental study of internal deformation in 3D solids with embedded parallel cracks during the fracture process using multi-material 3D printing and stereo digital image correlation

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-02-15 DOI:10.1016/j.tafmec.2025.104884

Yating Wang , Dongyi Xing , Meilu Yu , Qing Qiao

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引用次数: 0

Abstract

Quantifying the internal deformation of three-dimensional (3D) fractured solids during crack propagation is crucial for understanding the failure mechanism of 3D fractured solids and quantifying fracture parameters at the embedded crack tip. At present, there are still certain difficulties in measuring the internal deformation of 3D fractured solids during the failure process through physical experimental methods. Utilizing advanced technologies, including multi-material/color 3D printing, simulated speckle algorithms, and stereo digital image correlation (stereo-DIC), this study innovatively achieves dynamic measurement of the internal displacement field in 3D solids containing parallel cracks during crack propagation. The obtained displacement field is used to analyze the deformation characteristics of embedded cracks and determine the parameters at the 3D crack tip (stress intensity factors and theoretical crack initiation angle). The influence of prefabricated crack spacing on the 3D solid failure process was quantitatively analyzed through the differences in initiation pressures, failure pressures and crack tip parameters. The experimental results indicate that as the spacing between parallel cracks decreases, the compression effect at the crack tip in the center of the model diminishes while the shear effect increases, ultimately reducing the model’s bearing capacity.

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.