摘要
为了解碳纤维增强复合材料(CFRP)超力学结构的负泊松比效应实现机理及等效弹性力学,通过结构图示分析了内凹负泊松比结构实现拉胀效应或负泊松比效应的过程;设立基本假设推导了负泊松比结构在2个面内方向的等效弹性力学理论模型;采用控制变量法进行几何尺寸的参数化影响规律分析;通过与实验值和模拟值对比讨论了等效泊松比理论模型的预测效果。结果表明,采用Euler梁理论建立的等效弹性力学理论模型预测区间虽能包含实验和模拟结果,但存在较大误差,仍需进一步深入。
To understand the realization mechanism of the negative Poisson's ratio effect on carbon fiber-reinforced composite(CFRP)meta-mechanical structures,this paper analyzes the processes for achieving the auxetic effector the negative Poisson's ratio effect using structural diagrams.Theoretical models for equivalent elastic mechanics in the in-plane directions of negative Poisson's ratio structures are derived based on basic assumptions.The influence of geometric dimensions on parameters is analyzed using the control variable method.The predictive accuracy of the equivalent Poisson's ratio theoretical model is discussed by comparing it with experimental and simulated values.The results indicate that the prediction range of the equivalent elastic mechanics theoretical model,established using Euler beam theory,encompasses experimental and simulated results but exhibits significant errors.Developing a theoretical model for the equivalent elastic mechanics of laminated CFRP negative Poisson's ratio structures remains a challenging task that requires further research.
作者
赵昌方
GOH Kheng Lim
乐贵高
任杰
仲健林
ZHAO Changfang;GOH Kheng Lim;LE Guigao;REN Jie;ZHONG Jianlin(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Newcastle Research and Innovation Institute(NewRIIS),Singapore 609607,Singapore;Faculty of Science,Agriculture and Engineering,Newcastle University,Newcastle Upon Tyne NE17RU,UK)
出处
《青岛科技大学学报（自然科学版）》
CAS
2023年第5期87-99,共13页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
国家自然科学基金项目(12002169)
国家留学基金项目(202106840033)
江苏省博士后基金资助项目(2020Z226)
江苏省研究生科研与实践创新计划项目(KYCX21_0342)
南京理工大学优秀博士培养基金项目(2022).
关键词
超力学结构
内凹结构
拉胀结构
负泊松比结构
等效弹性力学
碳纤维复合材料(CFRP)
meta-mechanical structure
re-entrant structure
auxetic structure
negative Poisson's ratio structure
equivalent elastic mechanics
carbon fiber-reinforced composite(CFRP)
