对于不同厚度和合密度在合复合层材的低速度冲击下的有限元分析效应
Bangxiong Liu1,2, Jiamei Lai1, Hesheng Liu1,3
1Polymer Processing Research Laboratory, School of Advanced Manufacturing, Nanchang University, Nanchang 330031, China.
Polymers
|December 23, 2023
概括
这项研究开发了一种在低速度冲击 (LVI) 下合复合板材的渐进性损伤模型. 拼接通过减少分层增强了耐冲击能力,更高的拼接密度提供了更大的好处.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 复合板材易受低速冲击 (LVI) 的损坏.
- 拼接是一种提高复合板材损坏耐受性的方法.
- 了解合复合材料中的损伤机制对于结构完整性至关重要.
研究的目的:
- 根据LVI.制定和验证碳纤维合复合板材的渐进性损伤模型.
- 分析合密度和层层厚度对机械反应和损伤演变的影响.
- 调查合在减轻LVI诱导损伤方面的有效性.
主要方法:
- 开发了一种渐进式损伤模型,将Hashin和Hou故障标准用于光纤/矩阵损伤.
- 使用凝聚性区域建模来模拟分层和线性降解来降低刚度.
- 编码了一个VUMAT子程序,并使用Abaqus/Explicit进行有限元分析.
- 与实验数据对比验证的模拟结果.
主要成果:
- 该模型准确地预测了在LVI下合层材的机械反应和损伤演变.
- 确定的主要损伤模式是矩阵拉伸损伤和分层.
- 拼接显著提高了耐冲击性,减少了分层面积和范围.
- 更高的密度导致更有效的分层抑制.
结论:
- 开发的渐进性损伤模型为分析合复合材料中的LVI提供了可靠的工具.
- 拼接是一种有效的策略,可以增强复合板材的LVI电阻.
- 层材厚度显著影响损伤模式,薄板有利于矩阵拉伸损伤,厚板有利于分层.
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