基于变刚度软物质的复合材料预紧力齿力学性能研究

doi:10.19936/j.cnki.2096-8000.20260728.005

摘要/Abstract

摘要： 软物质的嵌入使复合材料预紧力齿接头中各齿的荷载分配趋于均匀,提高了接头的承载性能,但同时也导致单齿齿端出现应力集中现象,无法充分发挥软物质的性能。基于此,本文提出了嵌入变刚度软物质的单齿接头构型,通过试验与有限元模型,对比分析了等刚度与变刚度软物质对单齿接头承载力的影响。研究结果表明:相较于传统单齿接头,嵌入等刚度软物质使单齿接头的承载力降低了54.4%,而嵌入变刚度软物质使单齿接头的承载力提升了12.5%;相较于等刚度软物质,变刚度软物质的嵌入能够有效降低复合材料齿端的应力集中,从而提升接头的承载性能。

关键词: 预紧力齿连接, 等刚度软物质, 变刚度软物质, 应力集中, 渐进损伤模型

Abstract: The embedding of soft materials makes the load distribution among the teeth in the pre-tightened tooth joint of composite materials tend to be uniform, improving the bearing performance of the joint. However, it also leads to stress concentration at the tooth tip of a single tooth, which cannot fully utilize the performance of the soft material. Based on this, this paper proposes a single-tooth joint configuration with embedded variable stiffness soft materials. Through experiments and finite element models, the influence of constant stiffness and variable stiffness soft materials on the bearing capacity of single-tooth joints is compared and analyzed. The research results show that compared with the traditional single-tooth joint, embedding constant stiffness soft materials reduces the bearing capacity of the single-tooth joint by 54.4%, while embedding variable stiffness soft materials increases the bearing capacity of the single-tooth joint by 12.5%. Compared with constant stiffness soft materials, the embedding of variable stiffness soft materials can effectively reduce the stress concentration at the tooth tip of the composite material teeth, thereby improving the bearing performance of the joint.

Key words: pre-tightened toothed connection, constant stiffness soft materials, variable stiffness soft materials, stress concentration, progressive damage model

中图分类号:

TB332

李飞, 许伟, 赵烈秋, 陈维昭. 基于变刚度软物质的复合材料预紧力齿力学性能研究[J]. 复合材料科学与工程, 2026, 0(7): 33-43.

LI Fei, XU Wei, ZHAO Lieqiu, CHEN Weizhao. Study on mechanical properties of composite pre-tightened toothed based on variable stiffness soft materials[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(7): 33-43.

参考文献

[1] Deng Anzhong, Zhao Qilin, Li Fei, et al. Research on bearing capacity of single tooth to composite pre-tightened teeth connection[J]. Journal of Reinforced Plastics and Composites, 2013, 32(21): 1603-1613.
[2] Zhang Dongdong, Lv Yaru, Zhao Qilin, et al. Development of lightweight emergency bridge using GFRP-metal composite plate-truss girder[J]. Engineering Structures, 2019, 196: 109291.
[3] Zhu Ruijie, Li Feng, Zhang Dongdong, et al. Effect of joint stiffness on deformation of a novel hybrid FRP-aluminum spacetruss system[J]. Journal of Structural Engineering, 2019, 145(11): 04019123.
[4] Zhu Ruijie, Li Feng, Shao Fei, et al. Static and dynamic behaviour of a hybrid PFRP-aluminium space truss girder: experimental and numerical study[J]. Composite Structures, 2020, 243: 112226.
[5] Zhang Dongdong, Yuan Jiaxin, Zhao Qilin, et al. Static performance of a new GFRP-metal string truss bridge subjected to unsymmetricalloads[J]. Steel and Composite Structures, 2020, 35(5): 641-657.
[6] Zhang Dongdong, Zhao Qilin, Li Feng, et al. Torsional behavior of a hybrid FRP-aluminum space truss bridge: experimental andnumerical study[J]. Engineering Structures, 2018, 157: 132-143.
[7] 赵启林, 李飞, 徐康. 新型复合材料桁架结构静载实验研究[C]//第七届全国建设工程FRP应用学术交流会, 2011: 90-93.
Zhao Qilin, Li Fei, Xu Kang. The static loading experimental research of the new composite truss[C]//Proceedings of the 7th National Academic Conference on FRP Application in Construction Engineering, 2011: 90-93.
[8] 赵启林, 刘鹏飞, 徐龙星, 等. 玻璃纤维复合材料-钢组合桁架结构长期力学性能研究[C]//中国土木工程学会纤维增强复合材料(FRP)及工程应用专业委员会. 第八届全国建设工程FRP应用学术交流会论文集. 北京:《工业建筑》杂志社有限公司,2013: 215-219.
Zhao Qilin, Liu Pengfei, Xu Longxing, et al. Research on mechamical propenties of a glass fiber reinforced polymer-steel combined truss structure[C]//FRP Application Committee of China Civil Engineering Society (CCES). Proceedings of the 8th National Conference on FRP Application in Construction Engineering. Beijing: Industrial Construction Magazine Co., Ltd., 2013: 215-219.
[9] Zhang Dongdong, Zhao Qilin, Huang Yaxin, et al. Flexural properties of a lightweight hybrid FRP-aluminum modular spacetruss bridge system[J]. Composite Structures, 2014, 108: 600-615.
[10] Zhang Dongdong, Huang Yaxin, Zhao Qilin, et al. Structural performance of a hybrid FRP-aluminum modular triangular truss system subjected to various loading conditions[J]. The Scientific World Journal, 2014, 615927.
[11] Li Fei, Zhang Dongdong, Zhao Qilin, et al. A simple analytical solution for predicting deflection of a hybrid FRP-aluminum modular space truss bridge[J]. Journal of Central South University, 2015, 22(11): 4414-4425.
[12] 李飞. 复合材料新型连接技术及在桁架中的应用研究[D]. 南京: 解放军理工大学, 2012.
Li Fei. Research on novel connection technology for composite materials and its application in trusses[D]. Nanjing: PLA University of Science and Technology, 2012.
[13] Li Fei, Liu Zhen, Duan Jinhui, et al. Research on failure mode and load distribution pattern of composite pretightened tooth connections under different tooth shapes[J]. Engineering Failure Analysis, 2020, 118: 104801.
[14] 高一峰. 碳纤维复合材料预紧力齿连接破坏模式及设计方法研究[D]. 南京: 解放军理工大学, 2015.
Gao Yifeng. Study on failure modes and design methods of carbon fiber composite pre-tightened tooth connections[D]. Nanjing: PLA University of Science and Technology, 2015.
[15] 高一峰. 基于剪切非线性的复合材料预紧力齿连接强度与失效分析[D]. 南京: 陆军工程大学, 2019.
Gao Yifeng. Strength and failure analysis of composite pre-tightened tooth connections based on shear nonlinearity[D]. Nanjing: Army Engineering University of PLA, 2019.
[16] 匡博洋. 基于预紧力齿连接的复合材料空间桁架桥节点力学性能研究[D]. 南京: 解放军理工大学, 2016.
Kuang Boyang. Study on mechanical behavior of composite space truss bridge joints based on pre-tightened tooth connections[D]. Nanjing: PLA University of Science and Technology, 2016.
[17] Li Yaning, Ortiz C, Boyce M C. A generalized mechanical model for suture interfaces of arbitrary geometry[J]. Journal of the Mechanics and Physics of Solids, 2013, 61(4): 1144-1167.
[18] Li Yaning, Ortiz C, Boyce M C. Bioinspired, mechanical, deterministic fractal model for hierarchical suture joints[J]. Physical Review E, 2012, 85(3): 031901.
[19] Li Yaning, Ortiz C, Boyce M C. Stiffness and strength of suture joints in nature[J]. Physical Review E, 2011, 84(6): 062904.
[20] Wan Hongbo, Leung N, Algharaibeh S, et al. Cost-effective fabrication of bio-inspired nacre-like composite materials with high strength and toughness[J]. Composites Part B: Engineering, 2020, 202: 108414.
[21] Wei Zhiquan, Xu Xianghong. Gradient design of bio-inspired nacre-like composites for improved impact resistance[J]. Composites Part B: Engineering, 2021, 215: 108830.
[22] Sun Jiyu, Bhushan B. Hierarchical structure and mechanicalproperties of nacre: a review[J]. RSC Advances, 2012, 2(20): 7617.
[23] 刘振. 基于软物质的复合材料预紧力齿连接荷载分配研究[D]. 重庆: 重庆交通大学, 2022.
Liu Zhen. Research on load distribution of composite pre-tightening multi-tooth connection based on soft matter[D]. Chongqing: Chongqing Jiaotong University, 2022.
[24] Saldívar M C, Tay E, Isaakidou A, et al. Bioinspired rational design of bi-material 3D printed soft-hard interfaces[J]. Nature Communications, 2023, 14: 7919.
[25] Adams R D, Coppendale J, Peppiatt N A. Stress analysis of axisymmetric butt joints loaded in torsion and tension[J]. The Journal of Strain Analysis for Engineering Design, 1978, 13(1): 1-10.
[26] Balokhonov R, Romanova V. On the problem of strain localization and fracture site prediction in materials with irregular geometry of interfaces[J]. Facta Universitatis, Series: Mechanical Engineering, 2019, 17(2): 169-180.
[27] Saleh M N, Saeedifar M, Zarouchas D, et al. Stress analysis of double-lap bi-material joints bonded with thick adhesive[J].International Journal of Adhesion and Adhesives, 2020, 97: 102480.
[28] Lopes Fernandes R, Teixeira De Freitas S, Budzik M K, et al. Role of adherend material on the fracture of bi-material composite bonded joints[J]. Composite Structures, 2020, 252: 112643.
[29] Wang Wenzhi, Sun Yupei, Lu Yanyan, et al. Tensile behavior of bio-inspired hierarchical suture joint with uniform fractal interlocking design[J]. Journal of the Mechanical Behavior of Biomedical Materials, 2021, 113: 104137.
[30] Suresh S. Graded materials for resistance to contact deformation and damage[J]. Science, 2001, 292(5526): 2447-2451.
[31] Suresh S, Mortensen A. Functionally graded metals and metal-ceramic composites: part 2. Thermomechanical behaviour[J]. International Materials Reviews, 1997, 42(3): 85-116.
[32] Studart A R. Biological and bioinspired composites with spatially tunable heterogeneous architectures[J]. Advanced Functional Materials, 2013, 23(36): 4423-4436.
[33] Fang T H, Li W L, Tao N R, et al. Revealing extraordinary intrinsic tensile plasticity in gradient nano-grained copper[J]. Science, 2011, 331(6024): 1587-1590.
[34] Miyamoto Y, Kaysser W A, Rabin B H. Functionally graded materials: design, processing and applications[M]. New York: Springer Science Business Media, 1999.
[35] Giannakopoulos A E, Suresh S. Indentation of solids with gradients in elastic properties: part I. Point force[J]. International Journal of Solids and Structures, 1997, 34(19): 2357-2392.
[36] Jørgensen O, Giannakopoulos A E, Suresh S. Spherical indentation of composite laminates with controlled gradients in elastic anisotropy[J]. International Journal of Solids and Structures, 1998, 35(36): 5097-5113.