Experimental investigation on constitutive behavior of PVB under impact loading
Experimental investigation on constitutive behavior of PVB under impact loading
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冲击载荷下PVB本构行为的实验研究
DOI：
10.1016/j.ijimpeng.2010.10.001
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发表时间：
2011-02
影响因子：
5.1
通讯作者：
M. Zhu
中科院分区：
文献类型：
--
作者：
J. Xu;Y. Li;D. Ge;B. Liu;M. Zhu
在汽车相关事故中，PVB作为汽车挡风玻璃的夹层，在行人和乘客保护方面发挥着重要作用。本文对PVB材料的动态本构行为进行了深入的研究。首先，采用SHPB（Split Hopkinson Pressure Bar）方法对PVB试样进行了应变率为700 ~ 4500/s的动态压缩冲击实验。在实验数据验证的基础上，详细分析了本构响应。然后将PVB的应力-应变曲线分为两部分，即，“压实阶段”和“硬化阶段”。位错和分子间的纠缠是两阶段现象的主要原因。在低速和高速冲击下，本构行为不同，导致PVB在高速冲击情况下的能量吸收能力增加三倍。在此基础上，对基于Mooney-Rivlin模型和Ogden模型的数据拟合模型进行了研究和比较。Mooney-Rivlin模型更适合描述PVB材料。此外，还证明了PVB是一种率相关材料，其破坏强度强化因子β = 1.4。对比有粘弹性部分和无粘弹性部分的两种模型，PVB材料显示出很小的粘弹性。研究结果为进一步研究汽车耐撞性和行人/乘员保护提供了重要的实验数据、本构模型和PVB材料的分析。
During automotive related accidents, PVB plays an important role in both pedestrian and passenger protection as an interlayer of automotive windshield. In this paper, dynamic constitutive behavior of PVB material is thoroughly studied. Firstly, a set of dynamic compression impact experiments on PVB specimens using SHPB (Split Hopkinson Pressure Bar) method are conducted at strain rates from 700/s to 4500/s. Details of the constitutive response is analyzed based on the validation of experiment data. Stress-strain curve of PVB is then divided into two parts, i.e., “Compaction Stage” and “Hardening Stage”. Dislocations and entanglements among molecules are major reasons for the two-stage phenomena. Constitutive behaviors are different in low and high speed impacts, leading to three times more energy absorption ability of PVB in high speed impact scenario. Further, data fitting models based on both Mooney–Rivlin and Ogden Model are studied and then compared. Mooney–Rivlin Model is found to be more appropriate to describe PVB material. Moreover, PVB is proved to be a rate-dependent material with the failure strength intensify factor β ≈ 4. PVB material shows little viscoelasticity after comparison of the both models with and without the viscoelasticity part. Results offer critical experimental data, constitutive models and analysis of PVB material to further study of automotive crashworthiness and pedestrian/passenger protection.
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DOI：
10.1016/j.ijimpeng.2004.03.005
发表时间：
2004-08-01
影响因子：
5.1
作者：
Field, JE;Walley, SM;Siviour, CR
通讯作者：
Siviour, CR
影响因子：
3.3
作者：
P. D. Bois;S. Kolling;W. Fassnacht
通讯作者：
P. D. Bois;S. Kolling;W. Fassnacht
DOI：
10.1007/978-94-011-0529-3
发表时间：
1987-01
期刊：
--
影响因子：
--
作者：
Roger Brown
通讯作者：
Roger Brown
影响因子：
4.6
作者：
X. Hao;G. Gai;F. Lu;Xijin Zhao;Yihe Zhang;Ji-Ping Liu;Yang Yufen;Dayong Gui;C. Nan
通讯作者：
X. Hao;G. Gai;F. Lu;Xijin Zhao;Yihe Zhang;Ji-Ping Liu;Yang Yufen;Dayong Gui;C. Nan
影响因子：
4.7
作者：
Asik, MZ
通讯作者：
Asik, MZ