ERI: Understanding the Thermomechanical Response of Sandwich Structures with Triply Periodic Minimal Surface

ERI：了解具有三周期最小表面的夹层结构的热机械响应

• 批准号: 2138459
• 负责人: Sabrina Nilufar
• 金额: $ 20万
• 依托单位: Southern Illinois University at Carbondale
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-03-01 至 2025-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2138459&HistoricalAwards=false
• 关键词: ERI; Understanding; Thermomechanical; Response; Sandwich

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2).Sandwich structures are generally constructed to offer high strength and stiffness. They are used in myriads of applications including airplane, military, thermal insulation, vibration isolation, and automotive industry. However, the core topology becomes a limiting factor for achieving high-performance sandwich structures. Various aspects of core geometry can enhance the mechanical and thermal properties of the sandwich structures. Nevertheless, the underlying mechanism of such thermal and mechanical property enhancements in structural sandwiches remains unknown. This project seeks to unveil the mechanisms of thermomechanical property enhancement due to the modulation of the interior core architecture. The approach integrates numerical and experimental methods to illustrate the interior core topology and property relationships. Property enhancement of structural sandwiches that are used in a wide range of applications will benefit the national economy. This research involves multiple disciplines including engineering mechanics, materials science, and additive manufacturing. The project will support graduate and undergraduate students and encourage the participation of underrepresented minorities in science and engineering. The outreach component of the project will demonstrate research concepts to high school and middle school students.The objective of this project is to fundamentally understand how structured core lattice architecture improves the mechanical and thermal properties of sandwich structures. Various triply periodic minimal surface (TPMS) based core lattice, namely, gyroid, diamond, and primitive core structures will be extensively studied in this project. The research team will perform two tasks: (i) developing three-dimensional finite element method based numerical simulations to predict thermomechanical properties for various core topologies. The studies will identify high stress/ critical sections to optimize parameters including unit cell size and wall thickness for superior performance of different TPMS core structures; and (ii) to experimentally determine the deformation mechanism of TPMS core-based sandwich structures due to multi-mode mechanical loadings at various temperatures. In addition, detailed surface morphology and failure mechanisms will be studied through high resolution scanning electron microscopy. This project will help gain new understandings of thermomechanical behavior-topology relationship in sandwich structures with particular emphasis on various TPMS core lattice architecture.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项的全部或部分资金来自《2021年美国救援计划法案》(公法117-2)。夹层结构通常具有较高的强度和刚度。它们广泛应用于飞机、军事、隔热、隔振和汽车工业等领域。然而，芯层拓扑结构成为实现高性能夹层结构的限制因素。芯层几何形状的各个方面都可以提高夹层结构的力学和热性能。然而，结构夹层中这种热和机械性能增强的潜在机制仍不清楚。本项目旨在揭示由于内部核心结构的调整而提高热力性能的机理。该方法将数值方法和实验方法相结合，用来描述核心内部的拓扑结构和性质关系。广泛应用的结构夹层材料的性能增强将有利于国民经济。这项研究涉及多个学科，包括工程力学、材料科学和添加剂制造。该项目将支持研究生和本科生，并鼓励未被充分代表的少数民族参与科学和工程领域。该项目的外延部分将向高中生和中学生演示研究概念。本项目的目标是从根本上了解结构化核心格子结构如何改善夹层结构的力学和热学性能。本项目将广泛研究基于三周期极小曲面(TPMS)的各种核心晶格结构，即陀螺体、钻石和原始核心结构。研究小组将执行两项任务：(I)开发基于三维有限元方法的数值模拟，以预测各种堆芯拓扑的热力性质。研究将确定高应力/临界截面，以优化包括单元尺寸和壁厚在内的参数，以实现不同TPMS核心结构的优异性能；以及(Ii)通过实验确定TPMS核心夹层结构在不同温度下因多模式机械载荷而产生的变形机制。此外，还将通过高分辨率扫描电子显微镜研究详细的表面形貌和失效机制。该项目将有助于对夹层结构中的热力学行为-拓扑关系有新的理解，特别是对各种TPMS核心网格结构的关注。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Atomic composition/configuration dependent bulk moduli of Al–C composites

• DOI: 10.1063/5.0117900
• 发表时间: 2022-11
• 期刊: AIP Advances
• 影响因子: 1.6
• 作者: Hansika I. Sirikumara;W. Rativa-Parada;R. Karunanithy;P. Sivakumar;Sabrina Nilufar;T. Jayasekera

Nanocarbon-Infused Metal Matrix Composites: A Review

• DOI: 10.1007/s11837-023-05905-4
• 发表时间: 2023-06
• 期刊: JOM
• 影响因子: 2.6
• 作者: W. Rativa-Parada;Sabrina Nilufar