登录
注册
E-alert
登录
注册
E-alert
DEGRADATION LAWS OF MECHANICAL PROPERTIES FOR PROFILED STEEL SHEETS IN ACCELERATED CORROSION ENVIRONMENTS
-
摘要: 通过加速腐蚀试验得到不同厚度、不同腐蚀程度的压型钢板板材试件，并根据三维表面形貌及拉伸试验结果分析表面粗糙度参数随腐蚀时间的变化规律、不同腐蚀程度试件破坏形态、应力-应变曲线差异、拉伸性能参数与腐蚀率的函数关系，建立了腐蚀压型钢板的性能退化本构模型。结果表明：试件表面粗糙度参数随腐蚀时间的增长呈阶梯状变化；随着腐蚀率的增大，试件断口形式由平滑斜断裂转变为锯齿状或阶梯状断裂，同时屈服平台、颈缩段逐步缩短，拉伸力学指标逐渐退化；所建立的退化本构模型能够较好地表征不同腐蚀程度下钢材性能的退化规律。Abstract: The profiled steel sheet specimens with different thickness and corrosion degrees were obtained by accelerated corrosion tests. Based on the three-dimensional surface forms and tensile test results, the variation law of surface roughness parameters with corrosion time, failure modes of specimens with different corrosion degrees, difference of stress-strain curves, functional relations between tensile property parameters and corrosion rates were analyzed. A constitutive model of performance degradation for profiled steel sheets was proposed. The results showed that the surface roughness parameters of specimens changed in grades with the increase of corrosion time. With the increase of corrosion rates, the fracture mode of specimens changed from smooth oblique fracture to serrated or echelon form fracture, while the yield platforms and striction sections were gradually shortened, and the tensile mechanical indexes were gradually degraded. The degraded constitutive model could well characterize the degraded law of steel properties with different corrosion degrees.
-
Key words:
- corrosion /
- profiled steel sheet /
- mechanical property /
- constitutive model
-
梁远森,张印杰,李民生,等. 压型钢板在建筑工程中的应用[J]. 郑州大学学报(理学版),2002, 34(3):86-90. 肖作国. 压型钢板在屋面工程中应用的问题与探讨[J]. 建筑结构,1998, 27(1):26-28. 肖作国. 压型钢板应用和发展中的问题探讨[J]. 新型建筑材料,1997(7):15-17. 叶继红, 申会谦, 薛素铎. 点蚀孔腐蚀钢构件力学性能劣化简化分析方法[J]. 哈尔滨工业大学学报, 2016, 48(12):70-75. 惠云玲, 林志伸. 锈蚀钢筋性能试验研究分析[J]. 工业建筑, 1997,27(6):10-13. APOSTOLOPOULOS C A, PAPADOPOULOS M P. Tensile and Low Cycle Fatigue Behavior of Corroded Reinforcing Steel Bars S400[J].Construction & Building Materials, 2007, 21(4):855-864. NAKAI T, MATSUSHITA H, NORIO Y, et al. Effect of Pitting Corrosion on Local Strength of Hold Frames of Bulk Carriers (1st Report)[J]. Marine Structures, 2004, 17(5):403-432. NAKAI T, MATSUSHITA H, NORIO Y. Effect of Pitting Corrosion on Strength of Web Plates Subjected to Patch Loading[J]. Thin-Walled Structures, 2006, 44(1):10-19. 徐善华, 王皓, 苏磊. 中性盐雾腐蚀环境中Q235钢板力学性能的退化规律[J]. 机械工程材料, 2016, 40(5):86-91. 张世骥, 赵东拂, 幸坤涛, 等. 2 mm厚冷弯薄壁型钢腐蚀后材料力学性能研究[J]. 工业建筑, 2016, 46(4):114-119. 徐善华, 李柔, 苏超, 等. 锈损冷弯薄壁型钢材料力学性能试验[J]. 哈尔滨工业大学学报, 2018, 50(12):82-88. 石永久, 王萌, 王元清. 结构钢材循环荷载下的本构模型研究[J]. 工程力学, 2012, 29(9):92-98. -
点击查看大图
计量
- 文章访问数: 168
- HTML全文浏览量: 4
- PDF下载量: 2
- 被引次数: 0
下载:
