Dynamic failure of basalt/epoxy laminates under blast—Experimental observation

•Dynamic failures of basalt/epoxy laminates under blast loading were studied.•Effect of thickness and curvature on the failure modes were investigated.•Multiscale failure mechanics were examined. The dynamic failures of flat and single-curved woven basalt/epoxy laminates subject to blast loading wer...

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Bibliographic Details
Published in:International journal of impact engineering 2017-04, Vol.102, p.16-26
Main Authors: Li, Xin, Yahya, Mohd Yazid, Nia, Amin Bassiri, Wang, Zhihua, Yang, Jinglei, Lu, Guoxing
Format: Article
Language:English
Subjects:
Basalt
Basalt/epoxy laminate
Blast loading
Blast resistance
Breakage
Deformation
Deformation mechanisms
Delamination
Dynamic failure
Epoxy adhesives
Experimental investigation
Experiments
Failure analysis
Failure mechanisms
Failure modes
Indentation
Infinity
Laminates
Matrix
Measurement
Photomicrographs
Radius of curvature
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Summary:•Dynamic failures of basalt/epoxy laminates under blast loading were studied.•Effect of thickness and curvature on the failure modes were investigated.•Multiscale failure mechanics were examined. The dynamic failures of flat and single-curved woven basalt/epoxy laminates subject to blast loading were investigated experimentally. Number of fiber layers ((0/90)9, (0/90)18 and (0/90)28) and radii of curvature (infinity, R= 500mm and R= 250mm) were considered for the laminates in the experiment. A four-cable ballistic pendulum system was utilized to measure the impulse from the blast loading applied to the specimens. The tests were primarily conducted to characterize the deformation and failure modes of the laminates subject to blast loading, followed by a series of postmortem macroscopic and microscopic examinations to analyze the failure mechanism of laminates. The results showed that the blast-resistance of basalt/epoxy laminates was greatly enhanced through increasing the thickness. By decreasing the radius of curvature, the deformation mechanism of laminates under blast impact changed from flexural modes to indentation modes. Optical and scanning-electron (SEM) micrographs showed that the macroscopic delamination was mainly caused by matrix failure and debonding between fiber and matrix. Meanwhile, extensive fiber breakage led to the further macroscopic fracture of the laminates.
ISSN:0734-743X
1879-3509
DOI:10.1016/j.ijimpeng.2016.12.001