Influence of chamfering angle on the curing deformation characteristics of L-shaped composite truss

doi:10.19936/j.cnki.2096-8000.20250928.009

Abstract

Abstract: To solve problems of structure assembly difficulty and loading reliability reduction caused by curing deformation of U-shaped composite trusses, this paper established a composite material curing deformation simulation model under the framework of ABAQUS. Based on this model, the effects of structural shape and layup angle on the cure deformation of L-shaped composite truss were investigated. By comparing with the experimental results of the curing deformation of three asymmetric layups of L-shaped composite trusses, it was found that the maximum calculation error of the simulation model was 11%. Based on this model, the curing residual stress field and curing deformation characteristics of L-shaped composite trusses with lay-up angles of [0/0/45/-45]_S, [0/90/45/-45]_S, [90/90/45/-45]_S were investigated under different chamfer radii. The results showed that the chamfer radius and lay-up angle of the composites significantly affected the curing deformation and residual stress of the components. With the increase of chamfering radius, the curing residual stresses and deformations of the three layup specimens showed a decreasing trend. Under the same chamfering radius, the curing deformation and residual stress of the [0/90/45/-45]_S specimen was the smallest among the three ply designs. These results indicated that increasing the chamfering angle of the L-shaped truss and designing a reasonable and uniform layup angle can help to reduce the curing deformation of the L-shaped composite truss.

Key words: composites, curing deformation, finite element simulation, chamfering angle, layup orientation

CLC Number:

TB332

WANG Yan, HUANG Yongyong, LI Yichao. Influence of chamfering angle on the curing deformation characteristics of L-shaped composite truss[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(9): 65-74.

References

[1] 元振毅, 王永军, 张跃, 等. 基于材料性能时变特性的复合材料固化过程多场耦合数值模拟[J]. 复合材料学报, 2015, 32(1): 167-175.
[2] 李树健, 湛利华, 白海明, 等. 基于树脂流动的变截面复合材料结构固化过程热-流-固多场强耦合数值仿真[J]. 复合材料学报, 2018, 35(8): 2095-2102.
[3] 丁安心. 热固性树脂基复合材料固化变形数值模拟和理论研究[D]. 武汉: 武汉理工大学, 2016.[4] DING A, FANG S, LI X, et al. Experimental and numerical investigation of tool-part interaction on the process-induced distortions in composite structures[J]. Composite Structures, 2022, 279: 114871.
[5] XU M, ZHOU R, NI A, et al. A simple methodology for predicting process-induced spring-in of curved composite parts[J]. Composites Communications, 2022, 32: 101158.
[6] 乔巍, 姚卫星, 马铭泽. 复合材料残余应力和固化变形数值模拟及本构模型评价[J]. 材料导报, 2019, 33(24): 4193-4198.
[7] LIU X, GUAN Z, WANG X, et al. Study on cure-induced residual stresses and spring-in deformation of L-shaped composite laminates using a simplified constitutive model considering stress relaxation[J]. Composite Structures, 2021, 272: 114203.
[8] 包正弢. 热固性树脂基复合材料构件的固化变形仿真研究[D]. 德阳: 中国民用航空飞行学院, 2019.
[9] 牛晓坤. 热固性树脂基复合材料固化变形分析[D]. 沈阳: 沈阳航空航天大学, 2018.
[10] 荆宏达. 树脂基碳纤维增强复合材料固化变形的研究[D]. 天津: 中国民航大学, 2018.
[11] 田秋实. 热固性树脂基复合材料固化过程的数值模拟与实验研究[D]. 德阳: 中国民用航空飞行学院, 2017.
[12] 李冬娜. 树脂基复合材料固化行为的多尺度仿真研究[D]. 兰州: 兰州理工大学, 2018.
[13] 梁群, 冯喜平. 复合材料壳体固化成型过程残余应力和形变分析[J]. 固体火箭技术, 2019, 42(5): 628-634.
[14] WANG Q, LI T, YANG X, et al. Multiscale numerical and experimental investigation into the evolution of process-induced residual strain/stress in 3D woven composite[J]. Composites Part A: Applied Science and Manufacturing, 2020, 135: 105913.
[15] LANGE J, TOLL S, MÅNSON J A E, et al. Residual stress build-up in thermoset films cured above their ultimate glass transition temperature[J]. Polymer, 1995, 36(16): 3135-3141.
[16] WHITE S R, HAHN H T. Process modeling of composite materials: residual stress development during cure. Part Ⅰ. Model formulation[J]. Journal of Composite Materials, 1992, 26(16): 2402-2422.
[17] WHITE S R, HAHN H T. Process modeling of composite materials: residual stress development during cure. Part Ⅱ. Experimental validation[J]. Journal of Composite Materials, 1992, 26(16): 2423-2454.
[18] JOHNSTON A, VAZIRI R, POURSARTIP A. A plane strain model for process-induced deformation of laminated composite structures[J]. Journal of Composite Materials, 2001, 35(16): 1435-1469.
[19] BOGETTI T A, GILLESPIE J W. Process-induced stress and deformation in thick-section thermoset composite laminates[J]. Journal of Composite Materials, 1992, 26(5): 626-660.
[20] ABDELAL G F, ROBOTHAM A, CANTWELL W. Autoclave cure simulation of composite structures applying implicit and explicit FE techniques[J]. International Journal of Mechanics and Materials in Design, 2013(9): 55-63.
[21] 许玉荣, 梁纪秋, 祝珊, 等. 基于多层异质复合材料固化仿真模型构建的喷管扩张段结构参数设计[J]. 固体火箭技术, 2024, 47(5): 711-721.