• experimental and macroscopic investigation of dynamic crack patterns in pvb laminated glass sheets subject to light-weight impact

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 565
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     pvb laminated windshield has long been a standard component in both vehicular transportation tools and building structures, which plays a critical role in human protection and structure integrity. as a composite structure, it is inevitable to different types of impact from foreign objects. stones and pedestrian heads are two major potential impactors to vehicles, while stones and birds are among the main sources of impactors to pvb windshields in various buildings. a typical impact scenario involves a foreign object, which is small-sized and light-weighted (compare with that of the windshield), collides with a composite plate which consists of a pvb interlayer sandwiched by two brittle glass sheets. cracks are the most obvious traces left on the windshield plate after impact, thus attracting growing interests for studying the cracking behaviors which may contain abundant information about material property and impact history. unlike quasi-static cracking problem, dynamic fracture is more complex and challenging. although numerical simulations such as those based on probabilistic damage mathematical model, continuum damage mechanics, explicit finite element method, and extended finite element method  may provide useful insights for the foreign object impact resistance of windshield or glass, these studies often neglected the important pvb layer and most of them did not involve explicit crack growth and pattern analysis; moreover, the validation of simulations will critically rely on experiments.

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