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论文类型：期刊论文

发表时间：2019-05-30

发表刊物：CONSTRUCTION AND BUILDING MATERIALS

收录刊物：SCIE、EI

卷号：208

页面范围：314-325

ISSN号：0950-0618

关键字：Carbon Fiber Reinforced Polymer (CFRP); Specimen thickness; Durability; Accelerated method; Water uptake; Flexural strength

摘要：In this paper, an experimental research was undertaken to investigate the effect of specimen thicknesses on water absorptions and flexural strengths of wet lay-up CFRP laminates subjected to distilled water or alkaline solution immersion up to 180 days. Test results showed that the water uptake and flexural strength retention of CFRP laminates were significantly affected by the adopted specimen thickness. For the same aging time, the water uptake of CFRP laminates decreased in the early stage of immersion and increased in the later stage of immersion with the increase of specimen thickness. Meanwhile, the flexural strength retention generally increased as specimen thickness increased. In addition, a new thickness-based accelerated method for hygrothermal aging test of CFRP laminates was proposed. The accelerated factors of the water uptake and flexural strength retention of CFRP laminates were theoretically deduced. The proposed analytical model of accelerated factors was verified with current test data, and then applied to predict long-term properties of CFRP laminates. Compared with the traditional temperature-based accelerated method, the new thickness-based accelerated method is much easier to apply to predict long-term properties of CFRP laminates with good accuracy. (C) 2019 Elsevier Ltd. All rights reserved.