FRACTURE-TOUGHNESS AND FAILURE MECHANISMS IN SILICA-FILLED EPOXY-RESIN COMPOSITES - EFFECTS OF TEMPERATURE AND LOADING RATE

被引：49

作者：

KOH, SW ^{[1
]}

KIM, JK ^{[1
]}

MAI, YW ^{[1
]}

机构：

[1] UNIV SYDNEY, CTR ADV MAT TECHNOL,DEPT MECH ENGN, SYDNEY, NSW 2006, AUSTRALIA

来源：

POLYMER | 1993年 / 34卷 / 16期

关键词：

PARTICULATE COMPOSITES; FRACTURE TOUGHNESS; FAILURE MECHANISMS; TEMPERATURE; LOADING RATE;

D O I：

10.1016/0032-3861(93)90474-O

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理]; 080501 [材料物理与化学]; 081704 [应用化学];

摘要：

The fracture toughness and failure mechanisms of epoxy resin composites filled with silica particulates have been investigated in the temperature range -50-degrees-C to 80-degrees-C and at two loading rates. There are significant effects of temperature and loading rate on impact fracture toughness, which shows a peak at ambient temperature and decreases as temperature is reduced or raised. Fracture toughness under static loading is slightly lower than that of impact loading with similar dependence on temperature. Failure mechanisms are characterized based on SEM examination, which is correlated with the measured fracture toughness, the damage zone size developed at the advancing crack tip, and the residual stresses arising from differential thermal contraction between matrix and particles upon cooling from the cure temperature.

引用

页码：3446 / 3455

页数：10

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