Abstract
CARALL hybrid material has been extensively used in the aircraft structure due to their competitive impact strength. Low velocity impact test is utilized to evaluate the impact and damage properties for such material. It is also employed to observe complex damage mechanisms. A numerical modelling is an alternative way for impact assessment. This paper investigates the impact and damage properties under low velocity impact using numerical modeling and experimental work. A three-dimensional (3D) finite element (FE) model was devolved and validated with two studies from the literature. This model was meshed with solid elements. It was subjected to 2.4 m/s impact velocity and to 10 J impact energy. Absorbed energy, penetration, impact load and damage morphology were obtained. The impact energy was efficiently absorbed by the material. Both aluminum alloy layers underwent plastic deformation whereas the fiber layer failed. A macroscopic cross-sectional morphology was presented using the FE model. An agreement between the numerical and the experiment results were achieved and discussed.
Highlights
As a result of the improvement and development in the aircraft industry in terms of performance and weight saving, the fiber meatal laminates (FMLs) progress was widely noticed
The most common used FMLs are carbon fibers reinforced aluminum laminate (CARALL) which is based on carbon fiber, glass fiber reinforced aluminum laminate (GLARE) based on fiber glass, and aramid fiber reinforced aluminum laminate (ARALL) based on aramid fibers
This paper presents an advanced 3D finite element model used for evaluating of CARALL impact and damage properties under low velocity impact
Summary
As a result of the improvement and development in the aircraft industry in terms of performance and weight saving, the fiber meatal laminates (FMLs) progress was widely noticed. In [7] GLARE 5-2/1-0.3 was fabricated and tested with repetitive impact loading under low velocity regime This FMLs shows outstanding impact resistance attributed to the aluminum layers which arrest the delamination evolution. Pervasive delamination and several matrix cracking occur in carbon fiber reinforced epoxy subjected to low velocity impact loading [8]. Kevlar layers, for example, when it hybridize with S-glass fiber its impact strength and absorbed energy increase. This paper presents an advanced 3D finite element model used for evaluating of CARALL impact and damage properties under low velocity impact. This model was tested and validated with two studies from the literature.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
