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- W4384207849 abstract "Biological materials depict an excellent combination of both strength and toughness, which is a vital requirement for most engineering materials. It provides motifs to revolutionize the techniques for producing novel materials with improved properties. However, there is still a lack of deep understanding regarding the toughening mechanisms in biological materials, in order to overcome the conflict between strength and toughness in synthetic materials. This paper establishes a microstructure-based fracture model to reveal the toughening effect of the microcrack zone near the crack tip. Firstly, the stress–strain relationship considering the initiation and saturation of microcracks is derived. Then, a fracture mechanics model incorporating the micro-mechanics of microcracks is established, based on the above nonlinear mechanical response. Finally, the model is used to investigate the influence of microstructural parameters on the fracture toughness considering microcracks. The results show that there are two nondimensional parameters that significantly influence the fracture toughness: the ratio between the gap and overlapped zone, ξ, and λla. In addition, the selection of the microstructural parameters not only needs to consider the balance between stiffness, strength, and toughness, but also achieve the optimal toughness by combining the effects of several different mechanisms." @default.
- W4384207849 created "2023-07-14" @default.
- W4384207849 creator A5019759472 @default.
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- W4384207849 date "2023-09-01" @default.
- W4384207849 modified "2023-10-12" @default.
- W4384207849 title "Toughening amplification of microcracks in staggered composites" @default.
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- W4384207849 doi "https://doi.org/10.1016/j.engfracmech.2023.109475" @default.
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