| Inverse Design of New Mechanical Metamaterial for Base Isolator |
| کد مقاله : 1563-ISME2025 |
| نویسندگان |
|
سید امیر کیوان قربانی تنها *1، محمد مهدی میرزاجانی2، سهیل محمدی توچائی3، محمد زمانی4 1دانشکده مهندسی عمران، دانشکدگان فنی، دانشگاه تهران 2دانشجوی کارشناسی ارشد مهندسی زلزله دانشگاه تهران 3استاد تمام دانشکده مهندسی عمران دانشگاه تهران 4فارغ التحصیل رشته مهندسی سازه از دانشگاه تهران |
| چکیده مقاله |
| Mechanical metamaterials are artificially engineered structures designed to achieve extraordinary mechanical properties that are not typically found in natural materials. Mechanical metamaterials exhibit unique properties derived from their microstructural architecture, enabling tailored mechanical responses for advanced engineering applications. One such application is the seismic base isolation, where materials with an optimal bulk-to-shear modulus ratio (K/G) can mitigate structural vibrations. In this study, a topology optimization framework is employed as an inverse homogenization formulation to design mechanical metamaterials with a high K/G ratio, making them suitable for base isolators. The optimization framework is based on the Solid Isotropic Material with Penalization method and driven by an energy-based homogenization model to compute the effective macroscopic properties of the metamaterial. A key innovation of this work is the introduction of filtering function that strictly maintains connectivity and symmetry, preventing the emergence of disconnected or isolated elements during the optimization process. The methodology is implemented using a three-dimensional inverse homogenization framework, where the objective function maximizes the K/G ratio while adhering to predefined volume fraction constraints. The results demonstrate the emergence of continuum realizations of mechanical metamaterials for base isolator. The output present a significant step towards the rational design of metamaterials with tunable elastic properties through computational optimization. |
| کلیدواژه ها |
| mechanical metamaterials, topology optimization, inverse homogenization, base isolators, SIMP |
| وضعیت: پذیرفته شده برای ارائه شفاهی |