Adjustable dynamic compliances for optimized comforts in Gyroid-type Pad/Foam

摘要

This invention relates to develop a robust Gyrotd-type flexible pad/foam with controllable dynamic compliances for variable comforts, which is simulated with Gyroid architectures to optimize compliance fluctuations against discomforts. Since Gyroid architectures inherently have a good capability of energy dissipation It is difficult to simulate their dynamic compliances. In this invention, a Gyroid-like microstructure is analyzed in a mode of vibrations where applied compliances are numerically transferred to damping, which is described as force vs hysteresis loop in figure 1. From the figure, the optimization of a "comfort compliance" is achievable once a Gyroid-like microstructure show its multi-directional compliances established during the cyclic process. This can be done by changing Gyroid architectures design such as wall thickness, geometry patterns and materials configuration. As an example of the optimizing process with a Gyroid Pad is shown in figure 2. From the flow chart in the figure, we can see that dynamic compliances are adjusted and optimized when the Gyroid pad is extended, where multi-compliances are adjusted while the Gyroid architecture is optimized its comfort. Since the Gyroid Pad has hierarchical interfaces in thickness and connection it really matters how to define the interfaces in misalignment during FE simulations. In this invention, we show a solution for the two primary cases of the hierarchical interfaces, which is shown in figure 3. In cases of the mis-aligned connection, a connection wall is considered as either solid or perforated. If the connection is well aligned, the connection boundary is defined as either thickness or modulus transient.