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Post-fracture performance of laminated glass panels under consecutive hard body impacts

机译：连续硬体撞击下夹层玻璃面板的断裂性能

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摘要

Many problems may arise due to the accidental breakage of glass layers in laminated glass (LG) under extreme loads such as hard body impacts. This paper experimentally investigates the progressive post-fracture performance of double or triple layered polyvinyl butyral (PVB) LG panels under consecutive hard body impacts. Six cracking cases were initially defined. The impact energy and peak impact force at the breakage point were then obtained. Through investigating the impactor motion and strain variation at different breakage stages, the influence due to the tension-stiffening (TS) effect by adhesion and the interlocking effect between fragments on both local and global impact responses of cracked LG were subsequently examined. Thereafter, the dynamic stiffness variations in various cracking cases were identified. Finally, the effective thickness and effective modulus of post-fracture LG were determined via analysing the spectrum characteristics from the recorded vibration data. The results show that, in post-fracture cases with only one outer glass layer cracked, adequate interlocking efficiency of glass fragments in contact allows the local fractured glass to have a similar performance to intact glass. Due to the partial resistance against tensile action introduced by the TS effect and pre-compression by the volume expansion of the fragments, LG with the inner glass layer cracked presents an identical initial out-of-plane stiffness to that of LG with the outer glass layer cracked. However, as the impact energy increases, the stiffness contribution via TS is found to be less than that by the interlocking effect
机译：由于诸如硬体冲击的极端载荷，由于夹层玻璃（LG）中的玻璃层的意外断裂，可能会出现许多问题。本文通过在连续的硬体撞击下实验研究了双层或三层聚乙烯丁（PVB）LG面板的逐渐断裂性能。最初定义了六种开裂病例。然后获得破损点处的冲击能量和峰值冲击力。通过调查不同破损阶段的撞击运动和应变变化，随后检查了通过粘附和裂解LG的局部和全球撞击响应的碎片之间的张力加固（TS）效应引起的影响。此后，鉴定了各种开裂病例的动态刚度变化。最后，通过分析来自记录的振动数据的光谱特性来确定裂缝后LG的有效厚度和有效模量。结果表明，在只有一个外玻璃层破裂的断裂盒中，接触中玻璃碎片的足够互锁效率允许局部裂缝玻璃具有相似的性能与完整的玻璃。由于TS效应引入的拉伸作用和通过片段的体积膨胀引入的拉伸作用，LG与内玻璃层裂纹的LG与外玻璃具有相同的初始外刚度与LG相同的初始刚度层破裂。然而，随着冲击能量的增加，通过TS的刚度贡献被发现小于通过互锁效果的贡献

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  • 来源
    《Composite Structures》 |2020年第12期|112777.1-112777.13|共13页
  • 作者

    Wang Xing-er; Yang Jian; Chong Wai Tung A.; Qiao Pizhong; Peng Shennan; Huang Xuhao;

  • 作者单位

    Shanghai Jiao Tong Univ State Key Lab Ocean Engn Shanghai 200240 Peoples R China|Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn Shanghai 200240 Peoples R China|Ningbo Univ Key Lab Impact & Safety Engn Minist Educ Ningbo 315211 Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Ocean Engn Shanghai 200240 Peoples R China|Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn Shanghai 200240 Peoples R China|Univ Birmingham Sch Civil Engn Birmingham B15 2TT W Midlands England;

    UCL Fac Engn Sci UCL Mech Engn London WC1E 7JE England;

    Shanghai Jiao Tong Univ State Key Lab Ocean Engn Shanghai 200240 Peoples R China|Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Ocean Engn Shanghai 200240 Peoples R China|Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Ocean Engn Shanghai 200240 Peoples R China|Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn Shanghai 200240 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Laminated glass; Post-fracture performance; Impact; Dynamic load;

    机译：夹层玻璃;断裂后性能;影响;动态负荷;

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