Dynamic intralaminar fracture toughness characterisation of unidirectional carbon fibre-reinforced polymer composites using a high-speed servo-hydraulic test set-up

Application of Model-based Design Approach on Dynamic Tensile Testing of Carbon/Epoxy Composites at Intermediate Strain Rates

“…Dynamic testing system's responses could be extracted by a basic assumption that Aluminium Alloy 2024-T3 is a strain rate insensitive material at intermediate strain rates [18] so that the observed high amplitude oscillations caused by the test machine and fixture could be quantitatively evaluated from quasi-static test results. Further validation of the method was performed by using in-plane shear results of carbon/epoxy composites, IM7/8552 (later denoted as CC) at intermediate strain rates, which were obtained from the literature [19].…”

Study of fatigue damage behavior in off-axis CFRP composites using digital image correlation technology

“…This suggests that under low stress conditions, fibers efficiently distribute stress uniformly, while high stress levels lead to direct damage to the matrix and interfaces, possibly even causing localized fiber fracture. Additionally, several advanced monitoring techniques have been employed in the investigation of fatigue damage, including acoustic emission [ 20 , 21 ], thermal imaging [ [22] , [23] , [24] ], infrared methods [ 25 ], and digital image correlation (DIC) technology [ 26 , 27 ]. Chen et al [ 20 ] examined the damage progression during fatigue testing using acoustic emission technology, revealing three stages of damage under high compressive loading fatigue cycles: initial localized damage expansion, subsequent constant rate expansion, and rapid further expansion leading to failure.…”

“…Fruehmann et al [ 25 ] employed infrared technology to assess the evolution of fatigue damage in woven composite materials, discovering that thermal stress analysis phase data could identify microcracks in woven composite materials, indicating the initiation and presence of fatigue damage. Yoo et al [ 26 ] utilized high-speed servo-hydraulic testing equipment and DIC technology to characterize the dynamic intra-ply fracture toughness of CFRP composite materials. They proposed alternative testing methods for composite materials under medium to high strain rates.…”