两点弯曲下柔性玻璃变形和疲劳行为研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (9): 3455-3461.

两点弯曲下柔性玻璃变形和疲劳行为研究

魏韶山¹, 饶美娟¹, 刘小根^2,3, 曹大可^2,3, 万德田^2,3, 郑德志^2,3

1.武汉理工大学,硅酸盐建筑材料国家重点实验室,武汉 430070;
2.中国建筑材料科学研究总院,北京 100024;
3.中国国检测试控股集团股份有限公司,北京 100024

收稿日期:2024-02-20 修订日期:2024-03-26 出版日期:2024-09-15 发布日期:2024-09-19
通信作者: 刘小根,博士,教授级高级工程师。E-mail:xtlxg88@163.com
作者简介:魏韶山(2000—),男,硕士研究生。主要从事柔性玻璃力学性能的研究。E-mail:wsh2sia@163.com
基金资助:
国家自然科学基金面上项目(52072356);国家重点研发计划(2023YFC3806205);山东省科技型中小企业创新能力提升工程项目(2022TSGC1194)

Deformation and Fatigue Behavior of Flexible Glass under Two-Point Bending

WEI Shaoshan¹, RAO Meijuan¹, LIU Xiaogen^2,3, CAO Dake^2,3,WAN Detian^2,3, ZHENG Dezhi^2,3

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. China Building Materials Academy, Beijing 100024, China;
3. China Building Material Test and Certification Group Co., Ltd., Beijing 100024, China

Received:2024-02-20 Revised:2024-03-26 Published:2024-09-15 Online:2024-09-19

摘要/Abstract

摘要： 基于两点弯曲法加载方式及原理,分析了柔性玻璃的弯曲变形及疲劳行为,推导了弯曲曲率半径、弯曲应力与板间距之间的定量关系,基于高周疲劳理论,建立了柔性玻璃的应力-寿命(S-N_f)模型。结果表明,两点弯曲作用下,柔性玻璃试样的厚度不会改变其弯曲挠曲线轨迹,通过调节板间距,可获得试验所需的试样弯曲曲率半径。忽略柔性玻璃厚度的影响,试样的弯曲曲率半径与板间距呈线性关系,弯曲最大拉应力与弯曲曲率半径成反比。选择的最小弯曲曲率半径R_min越大,试样疲劳寿命越高,最大弯曲曲率半径R_max值的增大并不会显著影响试样的弯曲疲劳次数。Basquin模型能够有效预测不同交变应力或不同弯曲曲率半径作用下柔性玻璃的弯曲疲劳寿命。

关键词: 柔性玻璃, 两点弯曲, 弯曲曲率半径, 弯曲应力, 弯曲疲劳, 应力-寿命(S-N_f)模型

Abstract: Based on the two-point bending loading method and principles, the bending deformation and fatigue behavior of flexible glass were analyzed. The quantitative relationship between the bending curvature radius, bending stress, and plate spacing was derived. Employing the high-cycle fatigue theory, a stress-life (S-N_f) model for flexible glass was established. The results indicate that under two-point bending, the thickness of flexible glass specimen does not alter its bending trajectory. By adjusting the plate spacing, the desired bending curvature radius for experiment can be achieved. Neglecting the influence of flexible glass thickness, the bending curvature radius of specimen shows a linear relationship with the plate spacing, and the maximum tensile stress during bending is inversely proportional to the bending curvature radius. As the selected minimum bending curvature radius R_min increases, the fatigue life also increases, and an increase in the maximum bending curvature radius R_max does not significantly affect the bending fatigue cycles of specimen. The Basquin model can effectively predict the bending fatigue life of flexible glass under different alternating stresses or different bending curvature radii.

Key words: flexible glass, two-point bending, bending curvature radius, bending stress, bending fatigue, stress-life (S-N_f) model

中图分类号:

O346
TQ171

魏韶山, 饶美娟, 刘小根, 曹大可, 万德田, 郑德志. 两点弯曲下柔性玻璃变形和疲劳行为研究[J]. 硅酸盐通报, 2024, 43(9): 3455-3461.

WEI Shaoshan, RAO Meijuan, LIU Xiaogen, CAO Dake,WAN Detian, ZHENG Dezhi. Deformation and Fatigue Behavior of Flexible Glass under Two-Point Bending[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(9): 3455-3461.

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