Investigation of crack growth in functionally graded materials using digital image correlation
作者： Jorge Abanto-Bueno , John Lambros
DOI: 10.1016/S0013-7944(02)00058-9
关键词: Digital image correlation 、 Composite material 、 Deformation (engineering) 、 Edge (geometry) 、 Displacement field 、 Stress intensity factor 、 Materials science 、 Fracture (geology) 、 Polyethylene 、 Structural engineering 、 Toughness
摘要: The crack growth resistance behavior of functionally graded materials (FGMs) was investigated using the full-field measurement technique digital image correlation (DIC). Model FGMs were manufactured ultraviolet irradiation a photosensitive polyethylene co-polymer. Edge FGM fracture specimens loaded such that stable quasi-static occurred. A DIC code, generated and tested in-house, used to obtain in-plane displacement field surrounding propagating crack. results then extract stress intensity factors generate curves for FGM. continually increasing toughness with extension observed. optical also allowed investigation regions K-dominance in (i.e. areas where theoretical asymptotic fields well describe near tip deformation). compared factor values obtained face profile shape measurements good agreement found.
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