| dc.description.abstract | Porous materials are a unique material structure with a development history spanning thousands of years. Compared to solid materials, the appropriate arrangement of pores within these materials can make them lighter overall and impart features such as shock absorption, impact resistance, sound insulation, thermal insulation, and high breathability. These characteristics have made porous materials play important roles in many engineering fields, including construction, aerospace, automotive industry, and biomedical engineering. Current applications of porous materials include wheel frames, truss structures, artificial bones, and wing designs.Even before human civilization discovered the advantages of porous materials, biological evolution had already fully utilized these benefits. Many low-density, high-stiffness, and high-strength porous structural materials have naturally evolved in the natural world. Notable examples include the beaks and bones of birds, and the honeycomb structures within beehives.
In recent years, advancements in 3D printing, along with improvements in computational capabilities and methods, have made the use of materials and the arrangement of pores more diverse and complex, extending the reach of research even further. Porous materials with more intricate structures can now be manufactured, and various materials such as polylactic acid (PLA) and thermoplastic polyurethane (TPU) can be designed with complex geometries and successfully produced through 3D printing.
This thesis is based on the aforementioned background and uses the finite element method (FEM) in numerical simulation to study the mechanics of porous materials. It explores the relationships between the internal structural composition, material strength, and mechanical behavior of porous materials. The main analytical content of this thesis includes compression, shear force, and dynamic analysis of structural porous materials.
The pressure and shear force analyses investigate the relationships between various types of porous structures—such as pore size, arrangement, geometric shape, and load-bearing capacity. The dynamic analysis examines the effect of porous materials on stress wave propagation under the action of shock waves. | en_US |