October 2025
Intermediate to advanced
272 pages
7h 54m
English
Content preview from Standard Methods for Aerospace Stress Analysis
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8Composite Analysis
8.1 Introduction to Composite Analysis
The application of composite materials in the design of various structural systems is more common and trivial now. Composite materials are used because they can provide improvement of mechanical properties such as strength, stiffness, and toughness over the actual weight of the material. Detailed stress analysis of composite material is then required for design with such material constructions. Chapter 8 first provides the fundamental calculation methods necessary to evaluate composite lamina properties (single layer of laminated composites). Afterward, when the lamina behavior is evaluated, the detailed stress analysis methods for composite laminate structural properties (bonded layers of lamina) are explained.
8.2 Orthotropic Lamina
The composite lamina, by definition, is an orthotropic material that has properties that are different in each material direction in and out of the plane. The material direction parallel to the fiber direction is normally referred to as the longitudinal direction and the material direction that is perpendicular to the fiber direction is normally referred to as the transverse direction. Figure 8.1 illustrates this concept. It is essential to know that the properties of the lamina in the longitudinal direction are governed by the fiber properties, and the properties of the lamina in the transverse direction of the material are governed by the matrix (epoxy) properties. This lamina configuration ...
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