In situ statistical measurement of local morphology in carbon-epoxy composites using synchrotron X-ray computed tomography

被引：23

作者：

Rosini, Sebastian ^{[1
]}

Mavrogordato, Mark N. ^{[1
]}

Egorova, Olga ^{[2
]}

Matthews, Emily S. ^{[2
]}

Jackson, Samuel E. ^{[2
]}

Spearing, S. Mark ^{[1
]}

Sinclair, Ian ^{[1
]}

机构：

[1] Univ Southampton, Dept Mech Engn, Southampton SO17 1BJ, Hants, England

[2] Univ Southampton, Dept Stat & Math Sci, Southampton SO17 1BJ, Hants, England

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2019年 / 125卷

基金：

英国工程与自然科学研究理事会;

关键词：

Carbon fibres; Tensile failure; Fibre misorientation; Synchrotron Radiation Computed Tomography; FIBER-REINFORCED COMPOSITES; TENSILE-STRENGTH; STRESS-CONCENTRATIONS; FAILURE; MODEL; DISTRIBUTIONS; SIMULATION; PREDICTION; POLYMERS; DAMAGE;

D O I：

10.1016/j.compositesa.2019.105543

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Models are still deficient in accurately reproducing the mechanisms that trigger tensile failure in unidirectional composites, highlighting a lack of direct experimental evidence. In this study, emphasis is given to the identification of connections between local fibre misorientation, packing and Weibull strength distribution in causing tensile failure. Synchrotron Radiation Computed Tomography (SRCT) and automated image processing techniques are adopted to segment individual fibres from loaded carbon fibre coupons. Subtle indications in the misorientation of local damaged sites are assessed in novel statistical detail for systematic differentiation from non-damaged sites. It is observed that the morphology of the surrounding environment of damaged sites statistically differs from that of non-damaged sites, even though locally damaged sites (containing single or coupled breaks) do not exhibit a peculiar fibre packing arrangement. For adjacent coupled breaks, the statistical nature of fibre separation distances is also reported.

引用

页数：14

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