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Characteristics of crack growth in brittle solids with the effects of material heterogeneity and multi-crack interaction

Abstract Despite the extensive research on crack propagation in brittle solids, numerous unexplored problems still necessitate in-depth study. In this work, we focus on numerical modeling of multi-crack growth, aiming to explore the effect of material heterogeneity and multi-crack interaction on this process. To do this, an improved...

Wed Mar 27, 2024 18:36
A phase field model for ductile fracture considering the strain rate, stress triaxiality and Lode angle parameter

Abstract Ductile materials exhibit rate-dependent behaviors when subjected to different loading rates, particularly during impact and explosion events. In order to investigate the high strain rate behaviors of metal materials, a phase field model considered the rate-dependent threshold for effective plastic work is proposed. And...

Mon Mar 25, 2024 18:26
Fracture, my friend: the cutting of gummy metals

Abstract The study of fracture mechanics is usually within the paradigm of a failure mode that needs to be avoided. However, both in nature and in modern technology, there exist several situations where an ability to fracture is essential. In this work, we consider the problem of machining highly ductile and strain-hardening metals,...

Mon Mar 25, 2024 18:26
Coupled crystal plasticity and damage model for micro crack propagation in polycrystalline microstructures

Abstract Micro-crack propagation in polycrystalline materials can strongly depend on the defect size and its ratio to specimen size, and local variation in the microstructural features such as grain orientation, size, etc. While the dependencies are understood heuristically, the use of mechanistic models to capture the effect of...

Thu Mar 21, 2024 18:47
Contact problem of two punches in an elastic coating attached to a porous material

Abstract This paper investigates the contact problem of an elastic layer that is perfectly attached to a porous half-space by two rigid flat punches with collinear symmetry. Using integral transformation, the problem is condensed to a singular integral equation of the Cauchy type. Then, the exact expressions for the surface contact...

Mon Mar 11, 2024 15:18
Study on the whole dynamical fracture process of sandstone samples

Abstract The single cleavage drilled compression specimens of sandstone were impacted by the large-diameter split Hopkinson pressure bar, during which the whole model-I dynamical fracture process was successfully observed. A crack propagation gauge is used to monitor the key time moment of dynamic initiation, propagation, arrest...

Wed Feb 28, 2024 22:28

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