Detecting Low Velocity Impact Damage in Composite Plate Using Nonlinear Acoustic/Ultrasound Methods

被引:0
作者
U. Polimeno
M. Meo
D. P. Almond
S. L. Angioni
机构
[1] The University of Bath,Material Research Centre, Department of Mechanical Engineering
来源
Applied Composite Materials | 2010年 / 17卷
关键词
Non linear elastic material; Barely visible impact damage; Imaging technique;
D O I
暂无
中图分类号
学科分类号
摘要
The objective of this work was to image the presence of impact damage by monitoring the nonlinear response of damaged carbon/epoxy composite samples. The presence of microcracks, debonding, delamination, etc… induce the material to behave in a nonlinear elastic fashion highlighted by the presence and amplitude of harmonics in the spectrum of the received signal when the sample is periodically excited at one of its resonance frequencies. The sensitivity of a second harmonic imaging technique (SEHIT) based on material nonlinear elastic effect known as second harmonic generation (SHG) was investigated. The proposed imaging process was used to detect barely visible impact damage (BVID) due to low velocity impact (<12 J). The results showed that the SEHIT methods appear to be highly accurate in assessing the presence and magnitude of damage with a very promising future for both NDT and possibly structural health monitoring (SHM) applications. Moreover the technique was validated with two conventional NDT techniques: pulse thermography and thermosonics. The first NDT method failed in detecting the damage on the impacted face. The second technique was capable of localising and quantifying the damage on the impacted surface agreeing well with the results obtained using the proposed nonlinear imaging method.
引用
收藏
页码:481 / 488
页数:7
相关论文
共 30 条
[1]  
Nagy PB(1998)Fatigue damage assessment by nonlinear ultrasonic materials characterization Ultrasonics 36 375-381
[2]  
Van Den Abeele K(2000)Nonlinear elastic wave spectroscopy (NEWS) techniques to discern material damage, part I: nonlinear wave modulation spectroscopy (NWMS) Res. Nondestr Eval 12 17-30
[3]  
Johnston PA(1999)The new wave in acoustic testing Mater. World 7 544-546
[4]  
Sutin A(2001)Micro-damage diagnostics using nonlinear elastic wave spectroscopy (NEWS) NDT&E International 34 239-248
[5]  
Johnston P(2005)Nonlinear elastic wave spectroscopy identification of impact damage on sandwich plate Compos. Struct. 71 469-474
[6]  
Van Den Abeele KE–A(2008)Detecting damage in composite material using nonlinear elastic wave spectroscopy methods Appl. Compos. Mater. 15 115-126
[7]  
Sutin A(2007)Detecting barely visible impact damage detection on aircraft composites structures Compos. Struct 36 433-439
[8]  
Carmeliet J(2008)Damage detection in an aircraft foam sandwich panel using nonlinear elastic wave spectroscopy Comput. Struct. 86 483-490
[9]  
Johnston PA(2008)Damage localization using transient non-linear elastic wave spectroscopy on composite structures Int. J. Non-Linear Mech. 43 217-230
[10]  
Meo M(2006)A new damage detection technique based on wave propagation for rails Int. J. Solids Struct.: 43 1023-1046