Numerical Analysis of Three-Dimensional Braided Composite by Means of Geometrical Modeling Based on Machine Emulation

作者：Tolosana Narciso; Carrera Marco; Guzman de Villoria Roberto; Castejon Luis; Miravete Antonio^*

来源：Mechanics of Advanced Materials and Structures, 2012, 19(1-3): 207-215.

DOI：10.1080/15376494.2011.578784

• 3D composite materials
• structural behavior
• geometrical modeling
• yarn modeling

Three dimensional braided composite materials exhibit better performance in terms of structural integrity, through-thickness strength and impact resistance, than laminated composites. Other advantages regarding production are the ability to produce composite structures with intricate geometries close to the near-net-shape, and also with continuous changes in its cross-section. These properties are a consequence of the internal geometry of the 3D braided composites, in which yarns are interlaced following specific patterns programmed on a braiding machine. In this article, the operation of a typical rotary braiding machine is emulated in order to automatically obtain the geometry of a braiding unit cell. Once the geometrical description is obtained, a finite element model has been developed in order to carry out virtual testing of 3D composite materials. An AS4/epoxy braided material system has been virtually tested and a theory-experimental correlation has been performed for the longitudinal modulus and yield strength compression, using a failure criterion based on constituents and interface failures.

• 出版日期2012