弹道冲击下平纹织物局部剪切失效的微观力学特性研究

批准号:
12002070
项目类别:
青年科学基金项目
资助金额:
24.0 万元
负责人:
马莹
依托单位:
学科分类:
冲击动力学
结题年份:
2023
批准年份:
2020
项目状态:
已结题
项目参与者:
马莹
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中文摘要
三维机织物几何结构与力学性质关联表征技术是复合材料高性能利用和深层次开发的关键。织物内部结构复杂,且冲击加载带来高瞬态、高度非线性等问题,给其微观层面损伤机理研究提出挑战。本项目拟基于数字单元法理论,在申请者对该理论前期研发基础上改进和扩展,实现微观尺度的织造行为模拟和弹道冲击仿真。首先,研究织物几何结构与组分材料力学性能关联机制,在织造工艺的作用下建立平纹织物微观几何结构数值模型;而后,研究Kevlar KM2纤维单丝高应变率下的力学模型、剪力计算方法和剪切-拉伸协同作用的屈服准则,形成织物跨尺度强度理论;进而,考虑弹丸高速冲击下棱边切割织物表层纤维,造成纱线局部剪切失效,将弹道冲击模型在单一损伤工况下的触发机制与力学模型扩展至剪切-拉伸混合损伤工况,依此实现弹丸侵彻平纹织物微观尺度损伤演化行为仿真,揭示其局部剪切失效力学特性。项目预期为复合材料损伤机理研究提供新方法,具有重要科学意义。
英文摘要
The research into associated characterization of geometric structure and mechanical properties of 3D woven is a critical process to fully utilize and explore the high performance of composite materials. However, the diverse spatial configuration of fiber bundle and the high transient and nonlinearity characteristic of ballistic impact pose an immense challenge to analyze fabric failure mechanism at fiber scale length. Therefore, based on the Digital Element Approach (DEA) method, which is co-initiated and developed by the applicant, this project proposes a highly modified version of the DEA to achieve simulating weaving process and ballistic impact performance at filament level. First, the relationship between the fabric micro-geometry and the mechanical properties of its constituent materials is studied. Fiber bending stiffness is derived in terms of the resolution of yarn discretization. The numerical model of 2D plain weave micro-geometry is then established. Second, the constitutive relation, the method of shear stress calculation, and the combined shear-tension failure criterion of Kevlar KM2 single fiber are experimentally and analytically developed at high strain rate. The corresponding multi-scale fabric strength theory is developed. At last, considering the localized fabric shear failure at sub-yarn scale caused by the bullet sharp edge cutting fabric surface fiber, the fiber to bullet contact search algorithm and mechanical model is expanded from single to complex failure conditions. As such, the damage propagation of 2D plain weave impacted by cylindrical projectile is simulated at sub-yarn scale to reveal the mechanical properties of the localized shear failure. This project provides an insight and innovated method to study failure mechanism of 3D woven composite at micro-level and is of significant scientific importance.
期刊论文列表
专著列表
科研奖励列表
会议论文列表
专利列表
DOI:10.1177/00405175211015518
发表时间:2021
期刊:Textile Research Journal
影响因子:--
作者:Ma Ying;Dippolito Mario;Miao Yuyang;Wang Youqi
通讯作者:Wang Youqi
DOI:10.1177/00405175221093087
发表时间:2022-04
期刊:Textile Research Journal
影响因子:2.3
作者:Ying Ma;Zhifei He;Xiang Chen;Congying Deng;Yang Zhao;Sheng Lu
通讯作者:Ying Ma;Zhifei He;Xiang Chen;Congying Deng;Yang Zhao;Sheng Lu
DOI:10.13475/j.fzxb.20210405508
发表时间:2022
期刊:纺织学报
影响因子:--
作者:马莹;刘岳岩;赵洋;陈翔;禄盛;胡瀚杰
通讯作者:胡瀚杰
DOI:10.1177/15280837221139554
发表时间:2022-08
期刊:Journal of Industrial Textiles
影响因子:3.2
作者:Ying Ma;Weihong Xiang;Sheng Lu;Hanjie Hu;Xianjun Zeng
通讯作者:Ying Ma;Weihong Xiang;Sheng Lu;Hanjie Hu;Xianjun Zeng
DOI:10.13475/j.fzxb.20210403501
发表时间:2023
期刊:纺织学报
影响因子:--
作者:马莹;向卫宏;赵洋;邓聪颖;禄盛;曾宪君
通讯作者:曾宪君
数字技术与机器学习联合驱动的三维机织复合材料多尺度损伤容限预测
- 批准号:--
- 项目类别:省市级项目
- 资助金额:0.0万元
- 批准年份:2025
- 负责人:马莹
- 依托单位:
冲击载荷下纺织复合材料的动态力学行为研究
- 批准号:n/a
- 项目类别:省市级项目
- 资助金额:0.0万元
- 批准年份:2022
- 负责人:马莹
- 依托单位:
国内基金
海外基金
