Lock-In Thermography and Ultrasonic Testing of Impacted Basalt Fibers Reinforced Thermoplastic Matrix Composites

Applied Sciences

NatalinoDaniele Boffa¹  Carosena Meola¹  Ernesto Monaco¹  Simone Boccardi¹  GiovanniMaria Carlomagno¹  Giuseppe Del Core²  Giorgio Simeoli³  Pietro Russo³ 

[1] Department of Industrial Engineering—Aerospace Division, University of Naples Federico II, Via Claudio, 21, 80125 Napoli, Italy;Department of Science and Technology, University of Naples Parthenope, Centro Direzionale, Isola C4, 80143 Napoli, Italy;Institute for Polymers, Composites and Biomaterials, National Council of Research, 80078 (NA) Pozzuoli, Italy;

关键词: basalt fibers;    polyamide;    polypropylene;    composites;    impact damage;    lock-in thermography;    ultrasonic testing;   

DOI  :  10.3390/app9153025

来源: DOAJ

【 摘 要 】

Basalt fibers are receiving increasing consideration because they seem to be adequate as reinforcement of composites and to comply with the environmental safeguard rules. However, many factors affect the performance of composite material, demanding specific testing; one may be performance assessment under impact tests. The attention of the present work is focused on the detection of impact damage in basalt-based composites with two non-destructive testing techniques: lock-in thermography (LT) and ultrasonic testing (UT). Two different types of materials are considered which both include basalt fibers as reinforcement but two different matrices: Polyamide and polypropylene. Polypropylene is used either pure or modified with the addition of a coupling agent; the latter improves the fiber/matrix interface strength, giving in practice, a material of different characteristics. Specimens are first subjected to low-velocity impact tests and then non-destructively examined with the two above mentioned techniques. The obtained results are analyzed and compared to highlight the advantages and limitations of the two techniques to detect impact damage in basalt-based composites. Both techniques seem effective for the inspection of polyamide/basalt composite; in particular, there is a general agreement between results. Conversely, UT seems not suitable for the inspection of polypropylene/basalt composites because of their superficial porosity, while lock-in thermography is effective also for this type of composite material.

【 授权许可】

Unknown