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首页> 外文期刊>Composite Structures >Numerical investigation of the impact fracture performance of a composite laminated windshield considering the Park-Paulinho-Roesler cohesive zone model
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Numerical investigation of the impact fracture performance of a composite laminated windshield considering the Park-Paulinho-Roesler cohesive zone model

机译：考虑Park-Paulinho-Roesler Coolyive区模型的复合层压挡风玻璃抗冲击性能的数值研究

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摘要

The fracturing performance of the windshield glazing, as a simple sandwiched composite structure manufactured by bonding glass layers with polyvinyl butyral (PVB) interlayers, is indispensable to investigate the vehicle-pedestrian accidents. This paper presents an application of the simplified form of the Park-Paulino-Roesler (S-PPR) cohesive law along with fracture mechanics to the analysis of the mechanical behavior of the wind-shield under the pedestrian head impact, considering glass fracture and interfacial debonding. The S-PPR model calculates the damage variables in various mode-mixity cases to predict all separation paths, which yields to capturing more realistic crack patterns. A windshield finite element model is designed by embedding cohesive elements into the joint interfaces between the glass and PVB layers. The cracking mechanism of a windshield impacted by a headform impactor is simulated with a commercial explicit finite element code. Numerical simulation outcomes are validated by comparison with similar empirical observations. Furthermore, the difference between the S-PPR model and the commonly used bilinear model is investigated, in which simulation outcomes confirm that the S-PPR cohesive zone model (CZM) is more proper to capture the windshield cracking mechanisms. Ultimately, the effects of the impact locations and impact angles on the impact fracture performance of the windshield are investigated.
机译：挡风玻璃玻璃的压裂性能，作为通过用聚乙烯丁醛（PVB）中间层的玻璃层制造的简单夹层复合结构是不可或缺的，以研究车辆行人事故是必不可少的。本文介绍了公园 - 波莉诺 - 罗斯勒（S-PPR）内聚法以及断裂力学的简化形式的应用，以分析行人头部冲击下的挡风玻璃的力学行为，考虑玻璃骨折和界面剥夺。 S-PPR模型在各种模式混合情况下计算损伤变量以预测所有分离路径，从而产生更现实的裂纹模式。挡风玻璃有限元模型是通过将粘性元素嵌入到玻璃和PVB层之间的接头界面中而设计的。用商业明确有限元码模拟由地形冲击器影响的挡风玻璃的开裂机制。通过与类似的经验观察结果进行验证数值模拟结果。此外，研究了S-PPR模型与常用的双线性模型之间的差异，其中模拟结果证实S-PPR粘性区域模型（CZM）更适合捕获挡风玻璃裂缝机构。最终，研究了冲击位置和冲击角对挡风玻璃的冲击断裂性能的影响。

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