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|Title:||Analytical characterization of diamond braided fabric reinforced composites|
|Source:||Aggarwal, A.,Ganesh, V.K.,Ramakrishna, S. (1999). Analytical characterization of diamond braided fabric reinforced composites. International SAMPE Technical Conference 31 : 431-443. ScholarBank@NUS Repository.|
|Abstract:||Braiding, once an ancient art, is fast emerging as an important process of future. This arises due to the wide applicability of braided fabric composites in aircraft structural parts to biomedical devices. Development of accurate and computationally efficient model to predict the effect of internal microstructure on macroscopic behavior of composites is necessary to fully realize the potential of these composites. A general-purpose micromechanic model that discretely models the yarn architecture within the textile repeating unit cell (RUC) is developed. Mathematical relations using structural parameters such as braid construction, yarn geometry and overall volume fraction are utilized to quantify the geometry of braided fabric. The geometric model yields the yarn volume fraction and yarn orientations through the division of RUC into slices and subcells. Each subcell is treated as an assemblage of spatially oriented unidirectional laminates of transversely isotropic properties. Stiffness is predicted by calculating the engineering constants for each subcell followed by averaging it over the RUC volume using iso-strain conditions. Neat fabrics (under molding conditions) are used to establish the yarn geometry within composites that, later on, are prepared using hand lay-up technique. A reasonable correlation is observed between the experimental results and theoretical predictions.|
|Source Title:||International SAMPE Technical Conference|
|Appears in Collections:||Staff Publications|
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