相关实验视频

Updated: May 10, 2025

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

Published on: May 14, 2016

一种基于表面的计算同质化方法,用于可变密度聚合物格子元结构

Aofei Zhang¹, Shuo Li¹, Ling Ling¹

¹State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

|April 28, 2025

概括

预测聚合物晶格机械性能通过了解表面效应得到了改善. 一个新的表面规律和计算框架使可变密度格子元结构的有效和精确预测成为可能.

科学领域:

材料科学材料科学材料科学
机械工程机械工程
计算力学计算力学计算力学

背景情况:

由于表面诱导的大小效应,预测可变密度聚合物晶格元结构的机械性质具有挑战性.
目前的模型缺乏对表面现象如何影响这些复杂结构中的宏观行为的全面理解.

研究的目的:

识别和描述一个新的可变密度表面定律,该定律控制了宏观尺度上的表面内在长度.
开发一个高效和精确的预测模型,用于可变密度聚合物晶格元结构的机械行为.

主要方法:

使用大规模,高保真的有限元模拟来发现变密度表面定律.
开发了一个面积增强的计算同质化框架,结合了发现的表面定律和表面内在长度参数.
通过高通量数值模拟生成的离线数据库被用来构建预测模型.

主要成果:

确定了一种新的可变密度表面定律,这对于理解宏观表面效应至关重要.
成功开发了一种能够在线分析机械行为的高效预测模型.
该模型有效地保留了取决于配置的表面效应,提高了预测准确度.

结论:

开发的面积增强计算同质化框架显著提升了可变密度聚合物晶格元结构中的机械性质的预测.
这种方法克服了理解表面诱导的大小效应的局限性,提供了效率和精度.
这些发现为改进高分子格子材料的设计和应用铺平了道路.

关键词:

格子元结构是一个格子元结构.超材料是一种金属材料.聚合物聚合物的聚合物.表面效应表面效应表面效应表面增强的计算同质化.变量密度表面法则变量密度表面法则

更多相关视频

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

Polymer Microarrays for High Throughput Discovery of Biomaterials

Polymer Microarrays for High Throughput Discovery of Biomaterials

Published on: January 25, 2012

相关概念视频

Polymer Classification: Crystallinity

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...

Polymers: Molecular Weight Distribution

Polymers: Molecular Weight Distribution

For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.