Estimation of residual flexural strength of unidirectional glass fiber reinforced plastic composite laminates under repeated impact load

被引：11

作者：

Balan, R. ^{[1
]}

Arumugam, V. ^{[1
]}

Rauf, K. Abdul ^{[1
]}

Sidharth, A. Adhithya Plato ^{[1
]}

Santulli, C. ^{[2
]}

机构：

[1] Anna Univ, Dept Aerosp Engn, Madras 600025, Tamil Nadu, India

[2] Univ Camerino, Sch Architecture & Design, I-62032 Camerino, Italy

来源：

JOURNAL OF COMPOSITE MATERIALS | 2015年 / 49卷 / 06期

关键词：

Glass fiber reinforced plastic; impact damage; acoustic emission; residual flexural strength; LOW-VELOCITY IMPACT; ACOUSTIC-EMISSION; FAILURE MODES; IDENTIFICATION; TEMPERATURES; FRACTURE; CARBON;

D O I：

10.1177/0021998314525484

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

The aim of this study is to investigate the effect of low-velocity multiple impacts at ambient (35?) and elevated temperature (65? and 85?) on unidirectional glass fiber reinforced plastic (GFRP) composites. Low-velocity repeated impact tests were conducted using a falling weight tower at a constant velocity of 1.5m/s. The dominant parameters such as energy, contact force, and deflection were recorded during multiple impacts. The residual strength of laminates following repeated impact was evaluated by conducting three-point bending tests with acoustic emission (AE) real time monitoring. The temperature was revealed to play a key role in the impact response of composite materials, especially due to the progressive softening of the epoxy matrix. The nature and extent of damage during multiple impacts at ambient and elevated temperatures was investigated using real time AE monitoring: this analysis indicated delamination as a predominant failure mode, whose extent and criticality depended on temperature and number of impact events.

引用

页码：713 / 722

页数：10

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