摘要
为了确保复合材料修补结构后续的稳定性,需要利用非线性超声Lamb波对修补后的部位进行健康检测。利用非线性超声Lamb波高次谐波响应技术,对复合材料板胶接修补前后的拉伸损伤进行了实验与仿真研究。通过ABAQUS软件进行有限元建模,采用Hashin准则预测基体拉伸损伤演化,并在拉伸过程中引入平滑分析步,最后通过施加位移载荷模拟Lamb波的传播过程,在实验验证仿真模型可行性的基础上,研究非线性Lamb波高次谐波响应与拉伸位移之间的关系,以及不同拉伸损伤程度对非线性系数的影响。结果表明:与未修补结构相比,经过拉伸后胶接修补结构的损伤面积与二次、三次非线性系数明显降低,说明该方法可以评估工程胶接修补的有效性;随着拉伸位移的增加,二次、三次谐波幅值和非线性系数先增加后减小,在拉伸位移为1 mm时达到最大;借助非线性Lamb波高次谐波技术能够有效地对复合材料修补前后的拉伸损伤程度进行预测。
In order to ensure the subsequent stability of the composite repaired structure,it is required to use nonlinear ultrasonic Lamb wave to detect the health of the repaired area.Experimental and simulation studies of tensile damage in composite plate before and after adhesively-bonded repaired composite plates were conducted using nonlinear ultrasonic Lamb wave higher harmonic response technique.Finite element modeling was performed by ABAQUS software,the Hashin criterion was used to predict the tensile damage evolution of the matrix,and a smoothing analysis step was introduced in the tensile process.Finally,the propagation process of Lamb wave was simulated by applying displacement loads.On the basis of experimental verification of the feasibility of the simulation model,the relationship between higher harmonic response of nonlinear Lamb wave and tensile displacement,as well as the influence of different tensile damage degrees on the nonlinear parameters were investigated.The results show that compared with the unrepaired structure,the damage area,the second and third nonlinearity parameters in the adhesively-bonded repaired structure after stretching are significantly reduced.It indicates that this method can evaluate the effectiveness of engineering adhesively-bonded repair.With the increase of the tensile displacement,the second and third harmonic amplitudes and nonlinearity parameters first increase and then decrease,and reach the maximum at the tensile displacement of 1 mm.The nonlinear Lamb wave high order harmonic technology can effectively predict the tensile damage of composite before and after repair.
作者
朱光宇
赵江铭
尹振华
辛明坤
郑艳萍
ZHU Guang-yu;ZHAO Jiang-ming;YIN Zhen-hua;XIN Ming-kun;ZHENG Yan-ping(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,China)
出处
《科学技术与工程》
北大核心
2024年第20期8463-8469,共7页
Science Technology and Engineering
基金
河南省高校重点科研项目(23A460015)
国家自然科学基金面上基金(52175153)。
关键词
非线性超声
复合材料
胶接修补
拉伸损伤
非线性系数
nonlinear ultrasonic
composite materials
adhesively-bonded repair
tensile damage
nonlinearity parameter
