Synchrotron radiation computed tomography for experimental validation of a tensile strength model for unidirectional fibre-reinforced composites

被引：88

作者：

Swolfs, Y. ^{[1
]}

Morton, H. ^{[2
]}

Scott, A. E. ^{[2
]}

Gorbatikh, L. ^{[1
]}

Reed, P. A. S. ^{[2
]}

Sinclair, I. ^{[2
]}

Spearing, S. M. ^{[2
]}

Verpoest, I. ^{[1
,2
]}

机构：

[1] Katholieke Univ Leuven, Dept Mat Engn, B-3001 Leuven, Belgium

[2] Univ Southampton, Mat Res Grp, Southampton SO17 1BJ, Hants, England

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2015年 / 77卷

基金：

英国工程与自然科学研究理事会;

关键词：

Polymer-matrix composites (PMCs); Stress concentrations; Statistical properties/methods; Radiography; STRESS-CONCENTRATIONS; DAMAGE ACCUMULATION; STATISTICAL-ANALYSIS; FIBROUS COMPOSITES; FAILURE PHENOMENA; ELASTIC MATRIX; CREEP-RUPTURE; CARBON-FIBERS; MICROCOMPOSITES; DISTRIBUTIONS;

D O I：

10.1016/j.compositesa.2015.06.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Synchrotron radiation computed tomography has been used to analyse fibre break accumulation in unidirectional composites loaded in tension. The data are compared to model predictions. The model only slightly overestimated the composite failure strain, but predictions of fibre break density were too high, which can be mainly attributed to errors in the Weibull distribution. Both the number and percentage of interacting fibre break clusters were under-predicted by the model. This was attributed to an underestimation of stress concentrations in the model. While the experimental observations revealed mainly co-planar clusters, the model predicted mainly diffuse clusters. The experiments showed that the clusters did grow any further after their formation, while the model predicted a gradual development. Both local and dynamic stress concentrations were hypothesised to be key features for further exploration. The discrepancies identified, inform suggestions for directions advancing the state-of-the-art strength models of UD composites. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：106 / 113

页数：8

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