在Bouligand结构中塑料菌株的定位.
Bingbing An1, Tiange Zhou2, Yalin Li2
1Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai, 200444, PR China; Shaoxing Institute of Technology, Shanghai University, Shaoxing, 312074, PR China; Shanghai Institute of Aircraft Mechanics and Control, Zhangwu Road, Shanghai, 200092, PR China.
Journal of the mechanical behavior of biomedical materials
|November 15, 2024
概括
在生物复合材料中常见的布利甘德结构表现出独特的塑料变形,带有应变局部化带. 它的能量消耗取决于层状接口的强度和厚度,为生物灵感材料提供了洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 材料机械学 材料机械学
- 生物材料是一种生物材料.
背景情况:
- 布利甘德结构,以状纤维堆叠为特征,在自然复合材料中普遍存在.
- 虽然研究了其硬化机制,但布利甘德结构内的不弹性变形过程仍然不清楚.
- 了解这些机制对于设计先进的复合材料至关重要.
研究的目的:
- 为了研究和比较布利甘德,交叉叶片和单叶片结构的塑性变形机制.
- 阐明界面特性和叶片厚度对布利甘德结构的塑性行为的影响.
- 提供对布利甘德结构中的能量消散途径的见解.
主要方法:
- 进行了计算计算来模拟塑性变形.
- 分析的重点是诸如结,应变局部化,纤维旋转,层状扭曲和分层等机制.
- 进行了参数研究,以评估界面凝聚力和叶片厚度的影响.
主要成果:
- 不同于经历结的单层和交叉层状结构,布利甘德结构表现出塑料应变定位带,纤维旋转,状扭曲和分层.
- 布利冈结构的初始塑料能量消耗比交叉层结构低,但可以通过层分层实现高损伤能量消耗.
- 布利甘德结构中的塑料消散对叶片接口强度和叶片厚度敏感;较厚的叶片通过抑制应变局部化来增强塑料消散.
结论:
- 布利甘德结构的塑性变形涉及复杂的机制,包括应变局部化和分层化,与更简单的分层复合材料有很大不同.
- 界面特性和叶片厚度是控制布利甘德结构能量消散和变形行为的关键参数.
- 这项研究为开发模仿Bouligand建筑的新型生物灵感材料提供了基本的理解.
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