Defining role of wire aspect ratio on fracture toughness determination of brittle materials in cylindrical configuration
Source abstract
Abstract
Fracture toughness determination in specimen that is drawn into rods and wires requires accurate stress intensity factor (SIF) solutions for cylindrical fracture specimens at various wire aspect ratios. Finite element analysis has been employed to evaluate the mode I geometric factor solutions of various crack configurations in a cylindrical fracture specimen in tension, as a function of wire aspect ratio and relative crack depth. The defining role of wire aspect ratio is established for the first time with the geometric factor shown to be independent of wire aspect ratio for shallow cracks but having a significant effect for deeper cracks. The mechanistic origin of the same is explained. Experimental validation is carried out through fracture toughness measurements on polymethylmethacrylate (PMMA). The applicability of these solutions to fracture toughness measurements at the micro- and nanoscale, especially in ceramic fibres and high strength metallic wires, is discussed.Graphical abstract
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Non-Destructive Testing Techniques · Fatigue and fracture mechanics · Ultrasonics and Acoustic Wave Propagation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (43)
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