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Development of work-hardening performance in stainless-steel cylindrical columns by application of CFRP jackets

机译：通过使用CFRP护套开发不锈钢圆柱体的加工硬化性能

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Recent researches indicated advantageous characteristics for the metallic structural components, strengthened by FRP materials. The current paper examines the load carrying capacity and energy absorption of strengthening stainless-steel cylindrical columns using CFRP jackets. In the experimental program, the circumferentially over-wrapped columns showed considerable development in the work-hardening performance in addition to its maximum load carrying capacity. In the succeeding, a numerical simulation using the FE method was implemented for the further parametric studies. The validation of numerical modeling was primarily carried out with the experimental results. Subsequently, the influence of various lay-up configurations of the FRP jackets was investigated on the response of the strengthened columns. Furthermore, the failure mechanism based on damage criteria in FRP jacket and stainless steel column was studied in details. The main theme of the current work is focused on the interactive mechanical behavior of the metallic column and the composite jacket in the post yield of the nonlinear domain of the stainless-steel column. The results showed the promising influence of the CFRP-strengthening procedure on stainless-steel cylindrical columns under axial compression.
机译：最近的研究表明，FRP材料增强了金属结构部件的有利特性。本文研究了使用CFRP夹套加固的不锈钢圆柱体的承载能力和能量吸收。在实验程序中，周向包裹的柱子除了具有最大的承载能力外，还显示出在加工硬化性能方面的显着发展。随后，使用有限元方法进行了数值模拟，以进行进一步的参数研究。数值模型的验证主要是通过实验结果进行的。随后，研究了FRP夹套的各种叠置配置对加强柱响应的影响。此外，详细研究了基于损伤准则的FRP夹套和不锈钢柱的失效机理。当前工作的主题集中在不锈钢柱非线性域的后期屈服方面，金属柱与复合套的相互作用力学行为。结果表明，CFRP加固工艺对不锈钢圆柱柱在轴向压缩下的影响很大。

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