Impact damage characterization in cross-plied carbon fiber/thermoplastic composites using thermoelastic stress analysis

T. Yoshida; T. Uenoya; H. Miyamoto

doi:10.1117/12.915144

1 May 2012 Impact damage characterization in cross-plied carbon fiber/thermoplastic composites using thermoelastic stress analysis

T. Yoshida, T. Uenoya, H. Miyamoto

Author Affiliations +

Proceedings Volume 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012; 83470P (2012) https://doi.org/10.1117/12.915144
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

Carbon fiber (CF)-plastic composites are expected from the view point of light weighting vehicle structures. The CF/thermoset plastic laminates have low damage resistance to out-of-plane impact as a problem to be solved, because they behave as a low strength inter-laminar as compared with high-strength in fiber direction. Accordingly it is strongly desired to develop CF-composite materials based thermoplastics that have higher toughness than thermoset, for vehicle use. The present paper describes investigation of impact damages through thermoelastic stress analysis (TSA). Lowvelocity impact test using drop weight was conducted on stitched non-crimp-fabric CF/NY6 composite specimens. Stress distribution of the specimens under impact loading was monitored by a lock-in thermography system from the opposite side of the impact direction. The instrumentation system, which had a focal plane array detector, provided a succession of thermoelastic stress information as a sequence of TSA images at a high rate. The measured stress distribution agreed well with a theoretical. And also, selecting a contour feature of the stress distribution determined with a suitable level conformed approximately to the internal damage image that was processed from the TSA images obtained before and after impact.

Citation Download Citation

T. Yoshida, T. Uenoya, and H. Miyamoto "Impact damage characterization in cross-plied carbon fiber/thermoplastic composites using thermoelastic stress analysis", Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 83470P (1 May 2012); https://doi.org/10.1117/12.915144

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available