热老化对粘合剂粘接单搭接接头失效行为的影响

IF 1.5 4区 材料科学 Q4 MATERIALS SCIENCE, COMPOSITES
N. Sati, K. Turan, G. Örçen
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引用次数: 0

摘要

实验研究了热老化对单搭接粘接复合材料失效行为的影响。单层粘接接头试样由[0]8 层玻璃纤维/环氧树脂编织复合板通过粘合剂连接而成。对粘合剂粘接的单搭接试样采用了两种不同的热老化工艺。此外,这项研究是在温控烘箱中进行的,在不考虑湿度的情况下,使用了三种不同的粘合剂厚度(0.2、0.4 和 0.6 毫米)和三种不同的重叠长度(15、30 和 45 毫米)。热老化过程结束后,对试样进行拉伸试验,以确定破坏载荷。此外,还在 150°C 下放置 4 小时的条件下研究了粘合剂和复合板的硬度值。测定的破坏载荷和微观结构变化与室温(25°C)下对照试样的结果进行了比较。结果发现,硬度值的增加对粘合剂和复合材料的强度都有积极影响。随着热老化时间、温度和重叠长度的增加,破坏载荷分别增加了 8.4%至 79.1%、14.4%至 79.1%、9.5%至 50.9%。然而,增加粘合剂厚度会导致破坏载荷降低 4.6% 至 23.8%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The Effect of Thermal Aging on the Failure Behavior of Adhesive- Bonded Single-Lap Joints

The Effect of Thermal Aging on the Failure Behavior of Adhesive- Bonded Single-Lap Joints

The effects of thermal aging on the failure behavior of single-lap bonded joint composites were investigated experimentally. The single-lap bonded joints specimens were made of [0]8 layered woven glass fiber/epoxy composite plates joined together by adhesive. Two different thermal aging processes were applied to adhesive- bonded single-lap joints specimens. In the first process, temperatures of 75, 100, and 150°C were applied during the aging time of 4 h. In the second process, a constant temperature of 150°C was applied for aging times of 2, 4, and 8 h. Additionally, this study was carried out in a temperature-controlled oven, without considering humidity, using three different adhesive thicknesses (0.2, 0.4, and 0.6 mm) and three different overlap lengths (15, 30, and 45 mm). After the thermal aging process, the specimens were subjected to a tensile test to determine the failure loads. Furthermore, the hardness values of both the adhesive and the composite plate were investigated under the conditions of 4 h at 150°C. The failure loads and microstructural changes determined were compared with the results for control specimens kept at room temperature (25°C). It was found that the increase in hardness values positively affected the strength of both the adhesive and the composite. With increasing the thermal aging time, temperature, and overlap length, the failure loads increased by 8.4 to 79.1%, 14.4 to 79.1%, and 9.5 to 50.9%, respectively. However, an increasing the adhesive thickness resulted in a decreasing the failure loads by 4.6 to 23.8%.

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来源期刊
Mechanics of Composite Materials
Mechanics of Composite Materials 工程技术-材料科学:复合
CiteScore
2.90
自引率
17.60%
发文量
73
审稿时长
12 months
期刊介绍: Mechanics of Composite Materials is a peer-reviewed international journal that encourages publication of original experimental and theoretical research on the mechanical properties of composite materials and their constituents including, but not limited to: damage, failure, fatigue, and long-term strength; methods of optimum design of materials and structures; prediction of long-term properties and aging problems; nondestructive testing; mechanical aspects of technology; mechanics of nanocomposites; mechanics of biocomposites; composites in aerospace and wind-power engineering; composites in civil engineering and infrastructure and other composites applications.
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