Shear mode of fracture in composite laminates toughened by polyvinylidene fluoride nanofibers

2019 ◽  
Vol 227 ◽  
pp. 111327 ◽  
Author(s):  
H. Saghafi ◽  
A.R. Moallemzadeh ◽  
A. Zucchelli ◽  
T.M. Brugo ◽  
G. Minak
Keyword(s):  
Composite Laminates ◽  
Polyvinylidene Fluoride ◽  
Shear Mode

Characteristic Fracture Assessment of a Rivet Joint for Hybrid Composite Laminates under Static and Fatigue Shear Loads

2006 ◽  
Vol 326-328 ◽  
pp. 1757-1760 ◽  
Author(s):  
Dal Woo Jung ◽  
Nak Sam Choi
Keyword(s):  
Hybrid Composite ◽  
Composite Laminates ◽  
Pure Shear ◽  
Local Stress ◽  
Cyclic Fatigue ◽  
Shear Loading ◽  
Design Parameters ◽  
Tensile Fracture ◽  
Shear Mode ◽  
Composite Joint

Fatigue fracture behavior of a hybrid composite joint with riveting was evaluated in comparison to the case of static fracture. Hybrid composite joint specimens for shear test were made with layers of carbon fiber/epoxy composite and stainless steel. Characteristic fracture behaviors of those specimens were obviously different under static and cyclic loads. Static shear loading showed the fracture of a pure shear mode, whereas cyclic fatigue-shear loading caused the local stress concentration of a tensile mode and thus brought about the tensile fracture at that site. Experimental results obtained by static and fatigue tests were considered in modifications of design parameters of the hybrid joint.

scholarly journals Toughening Behavior of Carbon/Epoxy Laminates Interleaved by PSF/PVDF Composite Nanofibers

2020 ◽  
Vol 10 (16) ◽  
pp. 5618 ◽  
Author(s):  
Hamed Saghafi ◽  
Roberto Palazzetti ◽  
Hossein Heidary ◽  
Tommaso Maria Brugo ◽  
Andrea Zucchelli ◽  
...  
Keyword(s):  
Composite Laminates ◽  
Polyvinylidene Fluoride ◽  
Composite Nanofibers ◽  
Electrospun Nanofibers ◽  
Critical Energy ◽  
Mode I ◽  
Mode Ii ◽  
Critical Energy Release Rate ◽  
Mode Ii Loading ◽  
Combination Mode

This paper presents an investigation on fracture behavior of carbon/epoxy composite laminates interleaved with electrospun nanofibers. Three different mats were manufactured and interleaved, using only polyvinylidene fluoride (PVDF), only polysulfone (PSF), and their combination. Mode-I and Mode-II fracture mechanics tests were conducted on virgin and nanomodified samples, and the results showed that PVDF and PSF nanofibers enhance the Mode-I critical energy release rate (GIC) by 66% and 51%, respectively, while using a combination of the two registered a 78% increment. The same phenomenon occurred under Mode-II loading. SEM micrographs were taken, to investigate the toughening mechanisms provided by the nanofibers.

Enhancing the magnetoelectric response of Terfenol-D/polyvinylidene fluoride/Terfenol-D laminates by exploiting the shear mode effect

2015 ◽  
Vol 106 (11) ◽  
pp. 112905 ◽  
Author(s):  
Meng-Chien Lu ◽  
Lei Mei ◽  
Dae-Yong Jeong ◽  
Jing Xiang ◽  
Huaqing Xie ◽  
...  
Keyword(s):  
Polyvinylidene Fluoride ◽  
Shear Mode ◽  
Mode Effect ◽  
Magnetoelectric Response

Reliable Bonding of Composite Laminates Using Reflowable Epoxy Resins

2019 ◽  
Author(s):  
Frank Palmieri ◽  
Tyler Hudson ◽  
Roberto Cano ◽  
Erik Tastepe ◽  
Dean Rufeisen ◽  
...  
Keyword(s):  
Composite Laminates ◽  
Epoxy Resins

Micromechanics-based predictive model for compressively loaded angle-ply composite laminates

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 2299-2304
Author(s):  
Jung Hyun Ahn ◽  
Anthony M. Waas
Keyword(s):  
Predictive Model ◽  
Composite Laminates
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