Fracture performance of epoxy foam: Low density to bulk polymer
Fracture performance of epoxy foam: Low density to bulk polymer
复制标题
环氧泡沫的断裂性能:低密度至本体聚合物
DOI:
10.1016/j.polymer.2022.125420
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发表时间:
2022
期刊:
影响因子:
4.6
通讯作者:
Irven G
中科院分区:
文献类型:
--
作者:
Irven G
Epoxy foams with densities ranging from 180 to 500 kg/m 3 were prepared and mechanically tested in compression, tension, and single-edge notched bending (SENB) configurations. Fracture results revealed a marked transition in behaviour at a critical density, between 227 kg/m 3 and 249 kg/m 3. Lower density foams failed at low SENB displacement, producing low toughness and fracture energy results, whereas higher density foams failed at higher SENB displacements, with correspondingly higher values of toughness and fracture energy. The stress-intensity factor increased monotonically with density, from 0.1 to 0.79 MPa m 1/2. The fracture energy, G I c, of the foams reached values of up to 3.5 times that of the bulk polymer, 268 J/m 2. Lower density foams below the transition in fracture behaviour exhibited a small number of large cells, caused by cell coalescence, and a wider cell size distribution than the denser foams. This distribution appears linked to the transition in fracture behaviour. The behaviour revealed in this paper raises the point whether in future design criteria, where foams are now often used in composite sandwich structures, allowance should be made for denser foams to be used as appreciable increases in fracture energy of the foam core are achievable.
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DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
T. Cotgreave;J. B. Shortall
通讯作者:
J. B. Shortall
影响因子:
1.7
作者:
J. Li;B. Wang;S. Guo
通讯作者:
S. Guo
影响因子:
13.1
作者:
Carolan, D.;Mayall, A.;Fergusson, A. D.
通讯作者:
Fergusson, A. D.
影响因子:
8.4
作者:
He, Sammy;Carolan, Declan;Taylor, Ambrose C.
通讯作者:
Taylor, Ambrose C.
影响因子:
4.5
作者:
HUBER, AT;GIBSON, LJ
通讯作者:
GIBSON, LJ