面板内初始分层缺陷对复合材料泡沫夹层结构弯曲性能的影响

doi:10.19936/j.cnki.2096-8000.20260228.005

复合材料科学与工程 ›› 2026, Vol. 0 ›› Issue (2): 34-43.DOI: 10.19936/j.cnki.2096-8000.20260228.005

面板内初始分层缺陷对复合材料泡沫夹层结构弯曲性能的影响

顾楠¹, 刘文博², 王培培³, 杨帆³, 王荣国³, 朱福先^1*

1.江苏理工学院材料工程学院,常州 213001;
2.常州融信复合材料有限公司,常州 213033;
3.哈尔滨工业大学复合材料与结构研究所,哈尔滨 150080

收稿日期:2024-12-03 出版日期:2026-02-28 发布日期:2026-03-12
通讯作者: 朱福先(1979—),男,博士,副教授,硕士生导师,研究方向为复合材料力学,jxzfx@just.edu.cn。
作者简介:顾楠(2000—),男,硕士研究生,研究方向为轻量化设计与分析。
基金资助:
常州市科技成果转化及产业化计划(CC20230019);常州市产业前瞻与重点核心技术项目(CE20230039)

Effect of initial delamination defects in panels on the flexural properties of composite foam sandwich structures

GU Nan¹, LIU Wenbo², WANG Peipei³, YANG Fan³, WANG Rongguo³, ZHU Fuxian^1*

1. School of Materials Engineering, Jiangsu University of Technology, Changzhou 213001, China;
2. Changzhou Rongxin Composite Materials Co., Ltd., Changzhou 213033, China;
3. Center for Composite Materials and Structure, Harbin Institute of Technology, Harbin 150080, China

Received:2024-12-03 Online:2026-02-28 Published:2026-03-12

摘要/Abstract

摘要： 复合材料泡沫夹层板结构在制造和使用过程中,其面板内会产生分层缺陷,严重影响结构的承载性能。本文采用三点弯曲试验与有限元模拟相结合的方法,对面板内含初始分层缺陷的碳纤维/聚氨酯泡沫夹层结构在弯曲载荷下的承载性能进行了研究,分析了初始分层缺陷长度、宽度以及分层缺陷沿厚度位置对复合材料泡沫夹层结构弯曲性能的影响。基于内聚力模型模拟分析了初始分层缺陷的扩展演化过程,探讨了弯曲载荷作用下初始分层缺陷的扩展机理。结果表明:极限载荷值均随缺陷长度和宽度的增加而降低,其中宽度对其影响更大;分层缺陷扩展路径受尺寸和形状的影响较小,分层缺陷由缺陷的中部边界沿面板横向扩展;分层缺陷的位置由表层移动至中间层时,夹层结构的极限载荷随之增大。

关键词: 泡沫夹层结构, 有限元模型, 初始分层缺陷, 极限载荷, 分层扩展, 复合材料

Abstract: Composite foam sandwich structures are subject to delamination defects within their panels during manufacture and use, which can seriously affect the load-bearing properties of the structure. In this paper, the bearing performance of carbon fiber/polyurethane foam sandwich structures containing initial delamination defects within the panel under bending load is investigated using a combination of three-point bending test and finite element simulation, and the effects of the length and width of the initial delamination defects, as well as the location of delamination defect thicknesses, on the bending performance of the composite foam sandwich structures are analyzed. Based on the cohesive zone model (CZM), the extension evolution of initial delamination defects were analyzed, and the extension mechanism of initial delamination defects under bending load was discussed. The results show that the ultimate load decreases with the increase of the defect length and width, where the width has a greater influence; the expansion path of delamination defects is less affected by the size and shape, and the delamination defects expand transversely along the panel from the middle boundary of the defects; the location of the delamination defects is moved from the surface layer to the middle layer, and the ultimate load of the sandwich structure is then increased.

Key words: foam sandwich structure, finite element model, initial delamination defect, ultimate load, delamination expansion, composites

中图分类号:

TB332

顾楠, 刘文博, 王培培, 杨帆, 王荣国, 朱福先. 面板内初始分层缺陷对复合材料泡沫夹层结构弯曲性能的影响[J]. 复合材料科学与工程, 2026, 0(2): 34-43.

GU Nan, LIU Wenbo, WANG Peipei, YANG Fan, WANG Rongguo, ZHU Fuxian. Effect of initial delamination defects in panels on the flexural properties of composite foam sandwich structures[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(2): 34-43.

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面板内初始分层缺陷对复合材料泡沫夹层结构弯曲性能的影响

Effect of initial delamination defects in panels on the flexural properties of composite foam sandwich structures

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