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Experimental and numerical investigations on the failure behavior of metal skin and carbon fiber-reinforced polymer core structures considering layup and manufacturing process conditions

Jang, Sewon; Quagliato, Luca; Kim, Naksoo (서강대학교 전자공학과)

ADVANCED COMPOSITE MATERIALS, 2021, none, 1~22

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In this paper, the failure mechanism of metal skin (MS) and long carbon fibers reinforced core (CFRP) structures is investigated by means of tensile and bending tests, scanning electron microscope image analysis, and finite element simulations. For the failure modeling, a ductile damage model has be...
In this paper, the failure mechanism of metal skin (MS) and long carbon fibers reinforced core (CFRP) structures is investigated by means of tensile and bending tests, scanning electron microscope image analysis, and finite element simulations. For the failure modeling, a ductile damage model has been utilized for the MS, a traction separation model for the adhesive layers, whereas a modified Tsai-Hill criterion under the orthotropic assumption has been employed for the CFRP core. To verify the reliability of the proposed approach in predicting the failure of more complex MS-CFRP structures, experimental and numerical load-stroke curves relevant for two hat-shaped specimens, manufactured with two different MS, have been compared, showing a maximum deviation in the maximum load equal to 3.5%. The methodology proposed in this paper shows a systematic and reliable approach for the investigation of the fracture behavior of metal-composite structures, to be utilized for the design phase.