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Interfacial shear strength of carbon nanotubes based hybrid composites: effect of loading rate

Bedi, Harpreet Singh ; Billing, Beant ; Agnihotri, Prabhat

Frattura ed integritá strutturale, 2019-04, Vol.13 (48), p.571-576

Cassino: Gruppo Italiano Frattura

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Título:
Interfacial shear strength of carbon nanotubes based hybrid composites: effect of loading rate
Autor: Bedi, Harpreet Singh ; Billing, Beant ; Agnihotri, Prabhat
Assuntos: Carbon ; Carbon Fiber ; Carbon fiber reinforced plastics ; Carbon fibers ; Carbon nanotubes ; Carbon-epoxy composites ; CFRP ; Chemical synthesis ; Chemical vapor deposition ; CNTs ; Debonding ; Epoxy ; Epoxy matrix composites ; Failure mechanisms ; Fibers ; Hybrid composites ; IFSS ; Interfacial shear strength ; Load distribution ; Loading rate ; Microbond ; Nanotechnology ; Nanotubes ; Organic chemistry ; Polymers ; Reinforced plastics ; Scanning electron microscopy ; Shear strength
É parte de: Frattura ed integritá strutturale, 2019-04, Vol.13 (48), p.571-576
Descrição: Interfacial interaction is investigated between the two basic constituents in carbon fiber reinforced plastics (CFRPs). Efforts have been made to quantify the interfacial shear strength (IFSS) between individual carbon fiber (CF) and epoxy matrix in CFRPs by performing single fiber micro-droplet debond test. Initially, IFSS of the epoxy composites reinforced with unsized carbon fiber (HCF) is assessed. Study is then extended to assess the IFSS of carbon nanotubes (CNTs) based CFRP hybrid composites. The hybrid composites are prepared by reinforcing epoxy matrix with CNT grafted carbon fibers (CNTCF). The versatile, simple and time effective method of chemical vapor deposition is used to synthesize CNTs directly on the surface of CF. IFSS is found to enhance after the inclusion of grafted CNTs in CFRP composites. Keeping in mind the application view point of CFRPs to put up with varying loads, effect of loading rate on the IFSS of CFRPs is also examined. To this end, both HCF/epoxy and CNTCF/epoxy composites are debonded at cross-head rates varying by two orders of magnitude and IFSS is compared. Finally, scanning electron microscopy of debonded fibers is carried out to understand the interfacial failure mechanism in various composites.
Editor: Cassino: Gruppo Italiano Frattura
Idioma: Inglês;Italiano

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Interfacial shear strength of carbon nanotubes based hybrid composites: effect of loading rate

Bedi, Harpreet Singh ; Billing, Beant ; Agnihotri, Prabhat

Cassino: Gruppo Italiano Frattura

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