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Experimental investigation of load carrying mechanisms and failure phenomena in the transition zone of locally metal reinforced joining areas

机译:局部金属加固连接区域过渡区的承载机理及破坏现象的试验研究

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摘要

In modern lightweight structures the use of fasteners is preferred to other joining techniques due to the simple disassembly. Because of the low bearing strength of carbon fibre reinforced plastics often a local increase of the thickness is necessary, what is accompanied by eccentricities. A different approach is the local metal hybridisation, where CFRP layers are substituted locally by metal sheets of the same thickness. The local replacement leads to a transition zone between the hybrid region and the pure CFRP region. The present work deals with an experimental investigation of different transition zone patterns and especially the damage behaviour of CFRP-steel hybrid specimens in static tension and bending tests. Digital image correlation is used to measure the strain state during the testing. It is revealed that a staggered pattern with centre endings leads to a high load carrying capacity and a robust transition zone. (C) 2017 Elsevier Ltd. All rights reserved.
机译:在现代的轻型结构中,由于拆卸简单,所以紧固件的使用优于其他连接技术。由于碳纤维增强塑料的低承载强度,通常需要局部增加厚度,并伴有偏心距。另一种方法是局部金属混合,其中CFRP层由相同厚度的金属板局部替代。局部置换导致杂化区和纯CFRP区之间的过渡区。目前的工作是对不同过渡区模式的实验研究,尤其是CFRP-钢混合试样在静态拉伸和弯曲试验中的损伤行为。数字图像相关性用于在测试过程中测量应变状态。揭示了具有中心末端的交错图案导致高承载能力和稳健的过渡区。 (C)2017 Elsevier Ltd.保留所有权利。

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