LOW VELOCITY IMPACTS AND TEMPERATURE SENSITIVITY OF AUTOMOTIVE WINDSHIELDS

Q3 Engineering 汽车工程 Pub Date : 1971-02-01 DOI:10.4271/710869
R. Rieser, J. Chabal, C. W. Lewis
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引用次数: 3

Abstract

HEADFORM IMPACTS AT 5.5-7.7 MPH USING THE 22 LB AIR- STABILIZED MISSILE WERE RUN ON GLASS PANELS THAT DID NOT FRACTURE TO MEASURE DECELERATION PULSES AND OBTAIN SEVERITY INDEX (SI) VALUES. THESE TESTS SHOW LOW SI VALUES FOR THIS RANGE OF IMPACT VELOCITIES. DUMMY- WINDSHIELD TESTS WERE RUN AT SPEEDS OF 8.7-21.9 MPH TO MEASURE SI AND LACERATION. IN ALL CASES, LACERATION IS LOW AND SI VALUES DO NOT INDICATE CONCUSSIVE HAZARD BELOW APPROXIMATELY 15 MPH IMPACT VELOCITY, EVEN WHEN THE GLASS DOES NOT FRACTURE. THESE DATA ARE OF PARTICULAR INTEREST FOR THOSE ACCIDENT SITUATIONS BELOW THE PROBABLE VELOCITY FOR DEPLOYMENT OF A PASSIVE RESTRAINT SUCH AS THE AIR BAG. THE CURRENTLY USED HPR INTERLAYER FOR AUTOMOTIVE WINDSHIELDS SHOWS EXCELLENT SAFETY PERFORMANCE AT ROOM TEMPERATURE BUT IS LESS EFFECTIVE AT OTHER TEMPERATURES. IMPACT STUDIES OF SEVERAL GLASS STRUCTURES AT 30-110 F ARE PRESENTED FOR 0.03 AND 0.037 IN THICKNESS HPR NTERLAYERS. A SIMULATED DASHBOARD IS INCLUDED IN TEN DUMMY-WINDSHIELD IMPACT TESTS. EXTENSIVE HPR INTERLAYER RUPTURE OCCURS AT 30 AND 110 F, PRODUCING GREATER LACERATION HAZARD. /SAE/
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低速碰撞与汽车挡风玻璃的温度敏感性
使用22磅的空气稳定导弹,在5.5-7.7 MPH的速度下对未破裂的玻璃板进行顶形冲击,以测量减速脉冲并获得严重性指数(si)值。这些测试表明,在这个冲击速度范围内,si值很低。假人挡风玻璃测试在8.7-21.9英里/小时的速度下进行,以测量si和撕裂。在所有情况下,撕裂伤都很低,即使玻璃没有破裂,si值也不表明在大约15英里/小时的冲击速度下有脑震荡的危险。这些数据对于那些低于部署被动约束(如安全气囊)的可能速度的事故情况特别感兴趣。目前应用于汽车挡风玻璃的HPR夹层在室温下具有良好的安全性能,但在其他温度下效果较差。对厚度为0.03和0.037的HPR夹层在30-110华氏度下的几种玻璃结构进行了影响研究。模拟仪表盘包含在10个模拟挡风玻璃冲击试验中。在30华氏度和110华氏度时,广泛的HPR层间破裂,产生更大的撕裂危险。/ SAE /
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来源期刊
汽车工程
汽车工程 Engineering-Automotive Engineering
CiteScore
1.90
自引率
0.00%
发文量
5947
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AN INTEGRATING EXPERIENCE FUELING THE NEXT GENERATION PROOF OF PERFORMANCE RETICULATED POLYURETHANE FOAM DIGITALLY CONTROLLED SERVO-HYDRAULIC CRASH SIMULATOR.
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