Chapter 3 Longitudinal Coefficient of Moisture Expansion of a Unidirectional Lamina: Derivation
Автор: numericalmethodsguy
Загружено: 2025-01-23
Просмотров: 142
The document explains how to calculate the coefficients of moisture expansion for a unidirectional lamina. It focuses on both the longitudinal and transverse coefficients, denoted as beta 1 and beta 2, respectively. The formulas for these coefficients are provided, highlighting that they depend on various factors such as the volume fraction, moisture expansion coefficients, Young's modulus, and density of both the fiber and the matrix. Additionally, the concentration of moisture in the fiber and matrix plays a role, which can differ between the two. The video simplifies the formulas when the fiber does not absorb or deabsorb moisture, using an example of a composite lamina with a glass fiber that does not absorb moisture. The properties of the fiber and matrix are given, and the volume fractions are calculated. The video then details the steps to calculate beta 1 and beta 2, including the calculation of the density of the composite and the longitudinal Young's modulus. The process involves substituting the given values into the formulas to find the coefficients of moisture expansion.
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