ANALYSIS OF ELASTIC PROPERTIES OF CARBON REINFORCEMENT PLAIN WOVEN COMPOSITE USING MICROMECHANICAL FINITE ELEMENT MODELING

• Main Author: Listyo Rini, Agnes
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/41479
• Institution: Institut Teknologi Bandung

To improve properties and to ease manufacturing method, textile composites was developed. The simplest and most popular textile composite is plain woven composite. In the application of composites, knowledge of material properties is very important. One of the most important material properties is elastic properties. Elastic properties can be obtained through three methods: experimental test, analytical calculation, and numerical simulation. In this undergraduate thesis, numerical modeling of micromechanical finite elements will be carried out to obtain material properties of carbon fiber reinforced plain woven composite. Modeling is done at the meso level, which is a unit cell that represents the entire composite. Thus, the used periodic boundary conditions must match the unit cell actual condition. The fiber distribution in the yarn is not modeled but is represented by the material property value which depends on the yarn volume fraction. Modeling is done for three different yarn volume fractions: 41%, 43%, and 45%. Numerical modeling has a good agreement in estimating E11, E22, G12, ?12, ?13, and ?23, but not good enough in estimating E33, G13, and G23. The numerical value of longitudinal Young’s modulus E11 gives lower result compared to the experimental with error of 2.98%. Compared with another numerics reference, the numerical value of longitudinal shear modulus G12 and Poisson’s ratio (?12, ?13, and ?23) has an error of 9.63-11.55%, while the transverse shear modulus (G13 and G23) and thickness-wise Young’s modulus has an error of 19.05-19.43%. In addition, information about the effect of fiber volume fraction on elastic properties of plain woven composite was obtained. As the fiber volume fraction got higher, the values of E11, E22, E33, and G12 became higher, while the values of G13, G23, ?12, ?13, and ?23 became smaller. Further validation is needed to ascertain the effect of fiber volume fraction on G13, G23, and ?12