多层SGP夹层玻璃受刚体冲击作用的实验研究

doi:10.15541/jim20170595

摘要/Abstract

摘要：

多层SentryGlas®Plus (SGP)夹层玻璃在建筑行业被广泛作为承重材料, 玻璃在动态冲击下的脆性失效易导致夹层玻璃的承重性能大幅降低, 而目前对多层SGP夹层玻璃抗冲击性能的研究数据较少。本研究基于平均最小破坏速度(MMBV)测试方法, 对三层SGP夹层玻璃面板展开刚体冲击实验。首先采用高速相机追踪裂纹产生和扩展情况, 将夹层玻璃的开裂顺序分成三类, 并通过分析其冲击响应, 研究开裂顺序、支撑条件和玻璃面板构成对SGP夹层玻璃抗冲击性能的影响。实验结果显示, 边缘夹固式夹层玻璃需要更高的平均最小破坏速度来触发玻璃破损, 且与驳接点支式试样相比, 其碎裂前刚度提高了44%。相比于钢化玻璃, 半钢化玻璃碎片在受压状态下可产生更强的锁合机制, 从而明显提高试样刚度, 平均最小破坏速度则稍有增加。研究还显示动态刚度在破坏后阶段将会显著降低。最后, 结合高速相片分析了两类动态脱层特征。

关键词: 夹层玻璃, SGP夹层玻璃, 结构玻璃, 冲击实验, 动态荷载

Abstract:

Multiple layered SentryGlas®Plus (SGP) laminated glass (LG) is increasingly adopted in the construction sector. The brittle failure of glass under impact leads to the sudden loss of load bearing capacity, however, limited data has been reported to date concerning the impact resistance of multiple layered SGP laminated glass. This paper reports an experimental investigation on the impact performance of triple layered SGP LG panels under hard body impact using a mean minimum breakage velocity (MMBV) test approach. Three categories of breakage sequence were classified by tracing the crack initiation with high speed photos. The impact resistance of SGP LG was calculated by examining the effects of factors such as breakage sequence, support conditions and glass make-ups. The LG panel with the clamped edges required higher MMBV to trigger the glass breakage and had an increase of 44% pre-breakage stiffness than that with the bolted connection. The evident improvement in post-breakage stiffness due to the beneficial crack pattern of heat strengthened (HS) glass, compared to its counterpart of fully tempered (FT) glass, was also revealed, however, the increase in MMBV is modest. The results also showed that a significant degradation of dynamic stiffness can be found in the post breakage stage. Two types of delamination were identified and the dependency of their delamination growth on the impact velocity was analyzed.

Key words: laminated glass, SGP laminated glass, structural glass, impact test, dynamic load

中图分类号:

TQ174

张杨梅, 王星尔, 杨健, 刘清风, 刘炘炜. 多层SGP夹层玻璃受刚体冲击作用的实验研究[J]. 无机材料学报, 2018, 33(10): 1110-1118.

ZHANG Yang-Mei, WANG Xing-Er, YANG Jian, LIU Qing-Feng, LIU Xin-Wei. Experimental Study of Multiple Layered SGP Laminated Glass under Hard Body Impact[J]. Journal of Inorganic Materials, 2018, 33(10): 1110-1118.

图/表 11

图1 压电式冲击力计安装方式

Fig. 1 Installation of piezoelectric force ring sensor(a) Installation with impactor tip; (b) Installation with impactor body

图2 夹层玻璃冲击实验系统

Fig. 2 Test apparatus of impact tests

表1 冲击测试的SGP夹层玻璃试样

Table 1 SGP laminated glass specimens

No.	LG configuration	Thickness /mm	Support system	Dimension/(mm × mm)	Quantity	Parameter
1	FT/SGP/FT/SGP/FT	8/3/8/3/8	Bolted	1000 × 1000	3	Glass make-up
2	HS/SGP/HS/SGP/FT	8/3/8/3/8	Bolted	1000 × 1000	3	Glass make-up
3	HS/SGP/FT/SGP/FT	8/3/8/3/8	Bolted	1000 × 1000	3	Glass make-up
4	FT/SGP/FT/SGP/FT	8/3/8/3/8	Edge clamped	1000 × 1000	3	Boundary condition

图3 实验试样支撑条件示意图

Fig. 3 Schematic diagram of support conditions(a) Bolted; (b) Edged clamped

图4 下坠高度和冲击速度的拟合结果

Fig. 4 Regression results of drop height and impact velocity

图5 1号试样组(BS2破裂顺序)典型的裂纹产生和扩展(冲击速度为4.5 m/s)

Fig. 5 Typical crack initiation and propagation of No. 1 specimens (BS2) at impact velocity of 4.5 m/s

表2 SGP夹层玻璃试样致裂冲击速度和碎裂刚度

Table 2 Breakage velocity and breakage stiffness of SGP laminated glass specimens

Breakage sequence	ID (No.)	1^st breakage		2^nd breakage		3^rd breakage		Quantity
Breakage sequence	ID (No.)	v_break/(m•s^-1)	β_k/(kN•mm^-1)	v_break/(m•s^-1)	β_k/(kN•mm^-1)	v_break/(m•s^-1)	β_k/(kN•mm^-1)	Quantity
BS1	1	1.9	34.4	2.9	24.9	3.1	3.7	1
	2	2.1 ± 0.2	37.7 ± 8.0	2.9 ± 0.4	32.9 ± 5.7	3.1 ± 0.2	4.5 ± 2.7	2
	3	1.9	32.0	2.5	37.3	2.9	6.0	1
	4	2.5 ± 0.2	49.4 ± 4.4	4.5 ± 0.5	14.6 ± 3.0	3.8 ± 0.2	3.2 ± 1.4	2
BS2	1	2.4 ± 0.1	51.2 ± 0.6	4.2 ± 0.2	5.4 ± 0.7	-	-	2
	2	2.3	47.3	2.7	9.6	-	-	1
	3	2.2 ± 0.1	41.8 ± 4.3	3.3 ± 0.4	6.9 ± 2.1	-	-	2
BS3	4	2.5	52.3	4.7	20.6	3.8	5.3	1

图6 SGP夹层玻璃试样的冲击力峰值和碎裂能

Fig. 6 Peak impact force and breakage impact energy of SGP laminated glass specimens

图7 SGP夹层玻璃试样动态刚度变化

Fig. 7 Dynamic stiffness variation of SGP laminated glass specimens

图8 1号和4号试样组的最外层脱层和层间脱层现象

Fig. 8 Outmost and interlaminar delamination of No. 1 and No. 4 specimens(a) Specimen No.1 - bolted; (b) Specimen No.4 - edge clamped

图9 SGP夹层玻璃试样脱层区域直径

Fig. 9 Delamination zone sizes of tested specimens

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