EXPERIMENTAL AND NUMERICAL ANALYSIS OF THE EFFECT OF ASSEMBLY STRESS ON THE COMPOSITE STIFFENED PANEL FAILURE

doi:10.19936/j.cnki.2096-8000.20210428.014

Abstract

Abstract: Composite laminates are anisotropic and discontinuous along the thickness. Interlaminar stress exists in the composite laminate under out-plane loading. Delamination would happen where the out-plane stress is over interlaminate strength. In order to study the effect of out-of-plane compression load on the failure behavior of stiffened wall structure, corresponding experimental and numerical analyses were performed. Firstly, the failure load and failure mode of the specimens were obtained by the static loading test for the stiffened wall structure. Secondly, the structures were loaded to the working load through the bolts and maintained for a certain period of time. Finally, the finite element method was utilized to analyze the stress distribution of the structures. The results show that co-bonded area debonding and edge strip delamination would occur under the static load, slightly delamination was detected in the lower edge strip of the truss under the working load, and the qualitative agreement between the experimental and the numerical results was reasonably good. The research results provided references for the assembly operation specification and laminate design verification of composite structure.

Key words: composite, stiffened panel, assembly stress, chord delamination, experiment, numerical analysis

CLC Number:

TB332

WANG Shi-jie, CHEN Zhen, XU Peng, LIU Xiao-lin, WANG Hai. EXPERIMENTAL AND NUMERICAL ANALYSIS OF THE EFFECT OF ASSEMBLY STRESS ON THE COMPOSITE STIFFENED PANEL FAILURE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(4): 96-101.

References

[1] KEPPLE J, HERATH M T, PEARCE G, et al. Stochastic analysis of imperfection sensitive unstiffened composite cylinders using realistic imperfection models[J]. Compos. Struct., 2015, 126: 159-173.
[2] CASTRO S, GUIMARAES T, RADE D, et al. Flutter of stiffened composite panels considering the stiffener's base as a structural element[J]. Compos. Struct., 2016, 140: 36-43.
[3] 益小苏, 杜善义, 张立同. 复合材料设计手册[M]. 北京: 航空工业出版社, 1990.
[4] KNOPS M. Analysis of failure in fiber polymer laminates[M]. The Theory of Alfred Puck, 2008.
[5] 梁吉鹏, 马斌捷. 复合材料层合结构层间应力分析综述[J]. 强度与环境, 2013(40), 33-42.
[6] 秦志文. 复合材料加筋板螺栓连接结构的试验研究与有限元模拟[D]. 武汉: 武汉理工大学, 2008.
[7] 曾骥. 加筋板结构焊接变形预报方法研究[D]. 哈尔滨: 哈尔滨工程大学, 2004.
[8] 张皓彧, 闫恩玮, 张维斌. 复合材料T型加筋壁板成型工艺设计与验证[J]. 科技资讯, 2019, 017(12): 56-58.
[9] YANG Q D, COX B. Cohesive models for damage evolution in laminated composites[J]. International Journal of Fracture, 2005(133): 107-137.
[10] HEIDARI M, SAYEDAIN M. Finite element modeling strategies for 2D and 3D delamination propagation in composite DCB specimens using VCCT, CZM and XFEM approaches[J]. Theoretical and Applied Fracture Mechanics, 2019, 103: 102246.
[11] HESHMATI M, HAGHANI R, Al-EMRANI M, et al. On the strength prediction of adhesively bonded FRP-steel joints using cohesive zone modelling[J]. Theoretical & Applied Fracture Mechanics, 2018, 93: 64-78.
[12] YANG L, YAN Y, LIU Y, et al. Microscopic failure mechanisms of fiber-reinforced polymer composites under transverse tension and compression[J]. Composites Science and Technology, 2012, 72(15): 1818-1825.
[13] 张茹, 柴亚南, 张阿盈, 等. 含预制脱粘的加筋壁板损伤扩展[J]. 机械强度, 2020, 43(3): 716-722.
[14] IRWING R. Analysis of stresses and strains near the end of a crack traversing a plate[J]. Appl. Mech., 1957(24): 361-364.
[15] RYBICKI E F, KANNIMEN M F. A finite element calculation of stress intensity factors by a modified crack closure integral[J]. Fracture Mech,1977, 9(4): 931-938.
[16] 张少实, 庄茁. 复合材料与粘弹性力学[M]. 北京: 机械工业出版社, 2011.