Detecting low velocity impact damage in composite plate using nonlinear acoustic methods

Umberto Polimeno, Michele Meo, Darryl Almond, Stefano Angioni

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

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, etcaEuro broken vertical bar 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.
Original languageEnglish
Pages (from-to)481-488
Number of pages8
JournalApplied Composite Materials
Volume17
Issue number5
DOIs
Publication statusPublished - Oct 2010
Event7th International Conference on Composite Science and Technology - Sharjah, UAE United Arab Emirates
Duration: 20 Jan 200922 Jan 2009

Fingerprint

Nondestructive examination
Acoustics
Imaging techniques
Composite materials
Structural health monitoring
Debonding
Microcracks
Harmonic generation
Delamination
Carbon
Monitoring

Keywords

  • Barely visible impact damage
  • Imaging technique
  • Non linear elastic material

Cite this

Detecting low velocity impact damage in composite plate using nonlinear acoustic methods. / Polimeno, Umberto; Meo, Michele; Almond, Darryl; Angioni, Stefano.

In: Applied Composite Materials, Vol. 17, No. 5, 10.2010, p. 481-488.

Research output: Contribution to journalArticle

Polimeno, Umberto ; Meo, Michele ; Almond, Darryl ; Angioni, Stefano. / Detecting low velocity impact damage in composite plate using nonlinear acoustic methods. In: Applied Composite Materials. 2010 ; Vol. 17, No. 5. pp. 481-488.
@article{aa08742138754ac38da3d2d7dae4309e,
title = "Detecting low velocity impact damage in composite plate using nonlinear acoustic methods",
abstract = "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, etcaEuro broken vertical bar 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.",
keywords = "Barely visible impact damage, Imaging technique, Non linear elastic material",
author = "Umberto Polimeno and Michele Meo and Darryl Almond and Stefano Angioni",
year = "2010",
month = "10",
doi = "10.1007/s10443-010-9168-5",
language = "English",
volume = "17",
pages = "481--488",
journal = "Applied Composite Materials",
issn = "0929-189X",
publisher = "Springer Netherlands",
number = "5",

}

TY - JOUR

T1 - Detecting low velocity impact damage in composite plate using nonlinear acoustic methods

AU - Polimeno, Umberto

AU - Meo, Michele

AU - Almond, Darryl

AU - Angioni, Stefano

PY - 2010/10

Y1 - 2010/10

N2 - 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, etcaEuro broken vertical bar 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.

AB - 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, etcaEuro broken vertical bar 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.

KW - Barely visible impact damage

KW - Imaging technique

KW - Non linear elastic material

UR - http://www.scopus.com/inward/record.url?scp=78650794272&partnerID=8YFLogxK

UR - http://dx.doi.org/10.1007/s10443-010-9168-5

U2 - 10.1007/s10443-010-9168-5

DO - 10.1007/s10443-010-9168-5

M3 - Article

VL - 17

SP - 481

EP - 488

JO - Applied Composite Materials

JF - Applied Composite Materials

SN - 0929-189X

IS - 5

ER -