纤维增强树脂基复合材料结构极限强度预测方法

doi:10.19936/j.cnki.2096-8000.20250628.005

复合材料科学与工程 ›› 2025, Vol. 0 ›› Issue (6): 34-40.DOI: 10.19936/j.cnki.2096-8000.20250628.005

纤维增强树脂基复合材料结构极限强度预测方法

程显贺¹, 程宏川², 邹志伟^1*, 刘佳鑫¹, 李玉龙¹, 林再文¹

1.长春长光宇航复合材料有限公司,长春 130102;
2.上海空间推进研究所研究发展中心,上海 201112

收稿日期:2024-07-05 出版日期:2025-06-28 发布日期:2025-07-24
通讯作者: 邹志伟(1980—),男,硕士,正高级工程师,研究方向为先进树脂基复合材料和结构/功能一体化,zhiweizou@126.com。
作者简介:程显贺(1987—),男,博士,高级工程师,研究方向为纤维复合材料结构设计与CAE分析。
基金资助:
吉林省科技发展计划项目(20210201120GX)

Prediction method for ultimate strength of fiber-reinforced resin matrix composite structures

CHENG Xianhe¹, CHENG Hongchuan², ZOU Zhiwei^1*, LIU Jiaxin¹, LI Yulong¹, LIN Zaiwen¹

1. Changchun Aerospace Composite Materials Co., Ltd., Changchun 130102, China;
2. Research and Development Center, Shanghai Institute of Space Propulsion, Shanghai 201112, China

Received:2024-07-05 Online:2025-06-28 Published:2025-07-24

摘要/Abstract

摘要： 为了加快项目研制初期复合材料结构设计方案论证的进度,开发了一种便捷且实用的结构极限强度预测方法。首先,基于经典层合板理论给出层合板等效模量的解析表达式。其次,依据层合板逐层破坏及刚度退化的假定,采用数值算法预测了层合板的首层破坏强度与极限强度。然后,对比了典型铺层的层合板力学参数,结果表明等效弹性模量与极限拉伸强度的预测值与测试值完全吻合,仅极限压缩强度的预测值比测试值低10%。最后,以层合板的等效力学性能预测值作为基础参数,采用传统结构有限元方法预测典型端框法兰结构的极限强度,通过与试验件测试比较发现,预测破坏形式与试验破坏形式均为压缩破坏,且预测极限载荷比试验破坏载荷低15%。该方法计算速度快,计算精度满足设计初期结构方案论证需求。

关键词: 纤维增强树脂基复合材料, 层合板, 等效模量, 等效强度, 极限强度, 最大应力准则

Abstract: A convenient and practical method for predicting the ultimate strength of structures was developed for accelerating the progress of structural design scheme demonstration in the early stage of projects. Firstly, an analytical expression for the equivalent modulus of laminate was derived based on the laminate theory. Secondly, according to the assumption that the failure occurred layer by layer and stiffness degradation, the first layer failure strength and ultimate strength of laminate are obtained by numerical algorithm. Then, by comparing the predicted values and the tested values of equivalent mechanical parameters of laminate, it was found that the predicted values of equivalent modulus are completely consistent with the tested values, the predicted values of ultimate tensile strength are also completely consistent with the tested values, only the predicted values of ultimate compressive strength were 10% lower than the tested values. Finally, the ultimate strength of typical end frame flange structures was predicted by the traditional structural finite element method, based on equivalent mechanical properties of laminate. Through comparison with test, it was found that the predicted ultimate load was 15% lower than the experimental failure load. The method has a fast calculation speed and enough precision for structural design scheme demonstration in the early stage of projects.

Key words: fiber reinforced resin matrix composite, laminate, equivalent modulus, equivalent strength, ultimate strength, maximum stress criterion

中图分类号:

TB332

程显贺, 程宏川, 邹志伟, 刘佳鑫, 李玉龙, 林再文. 纤维增强树脂基复合材料结构极限强度预测方法[J]. 复合材料科学与工程, 2025, 0(6): 34-40.

CHENG Xianhe, CHENG Hongchuan, ZOU Zhiwei, LIU Jiaxin, LI Yulong, LIN Zaiwen. Prediction method for ultimate strength of fiber-reinforced resin matrix composite structures[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(6): 34-40.

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纤维增强树脂基复合材料结构极限强度预测方法

Prediction method for ultimate strength of fiber-reinforced resin matrix composite structures

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