残余应力分布对基板玻璃落球冲击强度影响的数值模拟研究
Influence of Residual Stress Distribution on Falling Ball Impact Strength of Substrate Glass Studied by Numerical Simulation
朱经纬 1舒众众 2金良茂 2曹志强 2张冲 2郑际杰 3刘涌 1韩高荣1
作者信息
- 1. 浙江大学材料科学与工程学院,杭州 310058
- 2. 蚌埠中光电科技有限公司,蚌埠 233030
- 3. 玻璃新材料创新中心(安徽)有限公司,蚌埠 233000
- 折叠
摘要
落球冲击强度是电子基板玻璃力学性能的重要指标,而残余应力对基板玻璃落球冲击强度有极大的影响.本文结合真实落球冲击试验,使用有限元方法对电子基板玻璃在不同残余应力分布模式下的落球冲击强度进行了数值模拟计算.结果表明,有限元数值模拟能够准确地反映落球冲击试验中的真实响应和基板玻璃破碎形貌.数值模拟中电子基板玻璃的落球冲击强度(通过残余质量率表征)和受冲击区域的残余张应力之间存在非线性关系,当残余张应力数值超过阈值时,落球冲击强度迅速下降.冲击区域存在的残余张应力对落球冲击产生的应力具有明显的放大作用,仅1.0 MPa的残余张应力就能使冲击产生的应力较无残余应力时提高约10 MPa,这是造成电子基板玻璃落球冲击强度下降的重要原因.
Abstract
The falling ball impact strength is a critical indicator of mechanical properties of electronic substrate glass,significantly influenced by residual stress.This study employed finite element methods to numerically simulate the falling ball impact strength of electronic substrate glass under varying residual stress distribution patterns,paralleled with actual falling ball impact experiments.The results indicate that the numerical simulation can accurately reflect the actual response and fracture morphology of substrate glass in falling ball impact experiment.In numerical simulation,the falling ball impact strength of electronic substrate glass,characterized by the residual mass ratio,exhibits a non-linear relationship with the residual tensile stress in the impacted area.The falling ball impact strength experiences a rapid decline when residual tensile stress exceeds a certain threshold.The residual tensile stress in the impact area significantly amplifies the stress generated by the falling ball impact.A mere 1.0 MPa residual tensile stress could cause the stress generated by the impact to elevate by approximately 10 MPa relative to the situation without residual stress,which is a vital reason for the fall in the falling ball impact strength of electronic substrate glass.
关键词
电子基板玻璃/落球冲击强度/残余应力/数值模拟/落球冲击试验Key words
electronic substrate glass/falling ball impact strength/residual stress/numerical simulation/falling ball impact experiment引用本文复制引用
基金项目
国家重点研发计划(2022YFB3603300)
国家自然科学基金(U1809217)
出版年
2024
国家科技期刊平台
NSTL
万方数据