@article {CIDADE2019707,
	title = {Determination of mode I dynamic fracture toughness of IM7-8552 composites by digital image correlation and machine learning},
	journal = {Composite Structures},
	volume = {210},
	year = {2019},
	note = {n/a},
	pages = {707 - 714},
	abstract = {<p>An optical experimental procedure for evaluating the J-Integral from full-field displacement fields under dynamic loading is proposed in this work. The methodology is applied to measure the J-integral in the dynamic compressive loading of fiber-reinforced composites and to calculate the dynamic fracture toughness associated with the propagation of a kink-band. A modified J-Integral that considers inertia effects is calculated over the full-field measurements obtained by digital image correlation, for double edge-notched specimen of IM7-8552 laminates dynamically loaded in a split-Hopkinson pressure bar (SHPB). A sensibility study is conducted to address the influence of the speckle parameters. The results show good agreement with experimental observations obtained by using a different data reduction method, suggesting the existence of a rising R-curve for the studied material under dynamic loading. Furthermore, it was noticed that the inertia effect can be negligible, indicating a state of dynamic equilibrium in which quasi-static approaches may comfortably be used.</p>
},
	keywords = {Digital image correlation (DIC), Dynamic fracture toughness, Fiber-reinforced composite materials, J-Integral},
	issn = {0263-8223},
	doi = {https://doi.org/10.1016/j.compstruct.2018.11.089},
	url = {http://www.sciencedirect.com/science/article/pii/S0263822318320932},
	author = {Rafael A. Cidade and Daniel S.V. Castro and Enrique M. Castrodeza and Peter Kuhn and Giuseppe Catalanotti and Jose Xavier and Pedro P. Camanho}
}
