ABSTRACT

The aim of the paper was to develop a test database of the ultimate strength characteristics of full-scale steel stiffened plate structures under axial compressive loading at a temperature of −80°C. This paper is a sequel to the authors’ articles (Paik et al. 2020a, https://doi.org/10.1016/j.istruc.2020.05.026 and Paik et al. 2020b, https://doi.org/10.1080/17445302.2020.1787930). In contrast to the earlier articles associated with room temperature or cryogenic condition, this paper investigated the effect of a low temperature at −80°C which is within the boundary range of temperature of the ductile-to-brittle fracture transition for carbon steels. A material model representing the test conditions was also proposed to capture the characteristics of carbon steels at low temperatures both in tension and in compression, and it was used in finite element method simulations of the full-scale experiment. A comparison between numerical analyses and experiments showed that the proposed model could successfully predict the failure modes and ultimate strength characteristics at low temperatures for stiffened plate structures under axial compressive loading conditions.

摘要

本文的目的是建立一个在-80°C的轴向压缩载荷下全尺寸钢加劲板结构极限强度特性的测试数据库。本文是作者文章的续集（Paik等人2020a，https://doi.org/10.1016/j.istruc.2020.05.026和Paik等人2020b，https://doi.org/10.1080 /17445302.2020.1787930）。与先前有关室温或低温条件的文章相比，本文研究了在-80°C的低温下的影响，该温度在碳钢的韧性到脆性断裂转变温度的边界范围内。还提出了一种代表测试条件的材料模型，以捕捉低温下碳钢在拉伸和压缩状态下的特性，它被用于全面实验的有限元方法模拟中。数值分析和实验结果的比较表明，所提出的模型可以成功地预测在轴向压缩载荷条件下加筋板结构在低温下的破坏模式和极限强度特性。