TY - GEN
T1 - Comparison of a cost-effective phase based thermography method with ultrasonic investigation of defects in CFRP structures
AU - Perterer, Martin
AU - Baier, Horst
AU - Höchtl, Franz
PY - 2011
Y1 - 2011
N2 - In recent years nondestructive inspection (NDI) methods have found their way into service in the aerospace and automotive industry. Reliable and sensitive NDI systems often represent high acquisition costs for small and medium-sized companies, which represent a significant fraction of aerospace and the majority of automotive suppliers as well as the whole area of high performance sports equipment. For this reason a new approach in thermographic testing is introduced in this work, which combines the advantages of a robust and cheap NDI system such as heat flow thermography with the defect sensitivity of a high performance NDI method such as Lock-In thermography. The data acquisition and excitation is separated, which together with the use of appropriate data management, analyzing software algorithms and cheap off-the-shelf components leads to an effective 2-D NDI system. A carbon fiber reinforced plastic (CFRP) test plate containing various kinds of defects (delaminations, inclusions, fiber cracks, resin accumulations, etc.) is used to compare this thermographic system with the results of a watercoupled ultrasonic system. It is shown that this system has comparable defect sensitivity and even shows advantages in the detection of overlapped defects while simultaneously reducing the total testing time. Furthermore large defect areas can be inspected very quickly.
AB - In recent years nondestructive inspection (NDI) methods have found their way into service in the aerospace and automotive industry. Reliable and sensitive NDI systems often represent high acquisition costs for small and medium-sized companies, which represent a significant fraction of aerospace and the majority of automotive suppliers as well as the whole area of high performance sports equipment. For this reason a new approach in thermographic testing is introduced in this work, which combines the advantages of a robust and cheap NDI system such as heat flow thermography with the defect sensitivity of a high performance NDI method such as Lock-In thermography. The data acquisition and excitation is separated, which together with the use of appropriate data management, analyzing software algorithms and cheap off-the-shelf components leads to an effective 2-D NDI system. A carbon fiber reinforced plastic (CFRP) test plate containing various kinds of defects (delaminations, inclusions, fiber cracks, resin accumulations, etc.) is used to compare this thermographic system with the results of a watercoupled ultrasonic system. It is shown that this system has comparable defect sensitivity and even shows advantages in the detection of overlapped defects while simultaneously reducing the total testing time. Furthermore large defect areas can be inspected very quickly.
UR - http://www.scopus.com/inward/record.url?scp=84856512349&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84856512349
SN - 9781934551103
T3 - International SAMPE Technical Conference
BT - SAMPE Tech 2011 Conference and Exhibition
T2 - SAMPE Tech 2011 Conference and Exhibition: Developing Scalable Materials and Processes for Our Future
Y2 - 17 October 2011 through 20 October 2011
ER -