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- W3120640257 abstract "Laminated composite materials are vulnerable to impact loading. Damage mechanisms induced by low velocity impact (LVI) include matrix cracking, delamination and fiber breakage. The LVI induced damage causes significant knockdown in the post-impact compressive strength of the material and therefore should be analyzed and understood thoroughly. In this work, the LVI behavior of a T800s/3900-2B laminate stacking sequence of [0/90/0/90¬9]s has been studied experimentally and numerically. LVI tests were performed according to the ASTM standard D7136. From the non-destructive inspection (NDI) of the impacted specimens, large transverse matrix cracking and delamination were observed. The damage pattern of this laminate is referred to as the “kidney” shape in this paper and is challenging to capture computationally since it is triggered by a strong interaction between matrix transverse cracking and delamination. A numerical model, based on the enhanced Schapery theory with inelasticity (EST-InELA) has been applied to solve this problem computationally. The LVI induced delamination was modeled with the Abaqus built-in cohesive contact approach. Numerical results obtained were compared against test results in terms of mechanical response and damage patterns. The EST-InELA model is shown to be capable of capturing the correct load responses and damage morphology with relatively high fidelity and efficiency." @default.
- W3120640257 created "2021-01-18" @default.
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- W3120640257 date "2021-01-04" @default.
- W3120640257 modified "2023-09-23" @default.
- W3120640257 title "Experimental and Numerical Investigation on the Low Velocity Impact Response of a Highly Anisotropic Composite Panel" @default.
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- W3120640257 doi "https://doi.org/10.2514/6.2021-1279" @default.
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