In:
Smart Materials and Structures, IOP Publishing, Vol. 31, No. 7 ( 2022-07-01), p. 075020-
Abstract:
Herein, a macroscopic double-network (DN) design for stretchable composite is proposed by embedding strain-rate stiffening elastomer (SSE) reinforced bars into the Ecoflex matrix. Due to the complementarity of mechanical properties between the soft-phase Ecoflex and hard-phase SSE as well as the strong interfacial bond strength, the Ecoflex/SSE composite achieves higher toughness and fatigue threshold than traditional single-network elastomers. Besides, based on the crack propagation characterization, strain-field evolution investigation, and finite element analysis, the fracture toughness of the Ecoflex/SSE composite is proved to be enhanced with the increase of the external strain rates. Interestingly, a sideway crack-arrest morphology is observed above 0.1 s −1 , displaying a better anti-crack ability of the Ecoflex/SSE composite at the higher strain rate. As a fundamental research in macroscopic DN composite, the method in this work provides a new idea for the toughening optimization of the strain-rate stiffening material. With the high fracture toughness, fatigue threshold, and flexibility, the Ecoflex/SSE composite has broad application prospects in designing high-performance stretchable elastomers.
Type of Medium:
Online Resource
ISSN:
0964-1726
,
1361-665X
DOI:
10.1088/1361-665X/ac7594
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2022
detail.hit.zdb_id:
1115038-5
detail.hit.zdb_id:
2002821-0
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