Strain Rate Effects in CFRP Used For Blast Mitigation

Polymers

Sarah L. Orton²  Vincent P. Chiarito¹  Christopher Rabalais¹  Matthew Wombacher² 

[1]U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA

[2] E-Mails:

[3]University of Missouri Columbia, E2503 Lafferre Hall, Columbia, MO 65211, USA

[4] E-Mail:

关键词: carbon fiber reinforced polymers;    blast loads;    reinforced concrete;    strain rate;    tensile strength;   

DOI  :  10.3390/polym6041026

来源: mdpi

【 摘 要 】

The purpose of this research is to gain a better understanding of strain rate effects in carbon fiber reinforced polymer (CFRP) laminates exposed to blast loading. The use of CFRP offers an attractive option for mitigating structures exposed to blasts. However, the effect of high strain rates in CFRP composites commonly used in the civil industry is unknown. This research conducted tensile tests of 21 CFRP coupons using a hydraulically powered dynamic loader. The strain rates ranged from 0.0015 s⁻¹ to 7.86 s⁻¹ and are representative of strain rates that CFRP may see in a blast when used to strengthen reinforced concrete structures. The results of the testing showed no increase in the tensile strength or stiffness of the CFRP at the higher strain rates. In addition, the results showed significant scatter in the tensile strengths possibly due to the rate of loading or manufacture of the coupon.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.