Study On The Explosion Resistance And Impact Resistance Of Typical Glass

The transparent,high strength,and durable properties of glass make it the main material used for observation windows.In this paper,the basic characteristics,quasi-static properties,blast resistance,and impact resistance of typical glass materials,such as tempered glass,Plexiglas,high borosilicate glass,and quartz glass,are examined and analyzed by three experimental test systems.In addition,the experimental specimens,experimental instruments,experimental systems,and the basic principles of the corresponding tests used in the quasi-static compression test,blast resistance test,and impact resistance test are introduced in detail,and the comprehensive performance of tempered glass,organic glass,high borosilicate glass,and quartz glass are compared and analyzed in joint engineering examples.This not only explores the dynamic response of different glass materials in complex environments but also provides a theoretical basis and a new experimental method for testing the blast and impact resistance of different glass materials.In particular,the combination of the experiments with the actual engineering practice has provided considerable practical experience and guidance in the selection of materials for future experimental window glass and the construction of protective cavities.The main findings of the experiments are summarized below.(1)Tempered glass,high borosilicate glass,and quartz glass materials,as typical brittle materials,are subjected to quasi-static compression tests in which the stress-strain curve is approximated as a straight line.In contrast,the Plexiglas specimens exhibited significant ductile damage.Although Plexiglas can withstand large deformation,its true compressive strength is not the strongest among all the glasses tested.After the real stress-strain data can be obtained,the order of static compression resistance of glass materials from strong to weak is tempered glass,Plexiglas,high borosilicate glass,and quartz glass.(2)In the blast resistance test of glass materials,as the diameter of the vent continues to reduce the blast resistance of each experimental glass performance is also gradually reduced.Glass materials from strong to weak blast resistance in this order for organic glass,tempered glass,high borosilicate glass,quartz glass.However,in the need to withstand multiple impacts and higher temperatures,to avoid the use of organic glass.Different thicknesses of glass specimens of deflagration flame speed curve maintain a good consistency,with the same glass specimens in the large-diameter vent and different specimen thickness when the average speed of deflagration flame propagation is roughly the same are maintained in the approximate range of 120～190 m/s,and most maintain the speed of 150m/s or so.(3)When the glass specimen is not broken,the time course of the deflagration flame pressure curve follows roughly the same trend.But the glass specimen is broken after the pressure change is significantly different from the glass specimen is not broken.Glass broken,the steepness of the peak pressure has slowed down significantly,the peak pressure of the peak change is also in the gradual reduction.From the experimental data,it can be seen that the peak pressure of tempered glass was reduced from the original peak value of 887.50 k Pa to 503.75 k Pa,a decrease of43.24%;the peak pressure of high borosilicate glass was reduced from the original peak value of 788.75 k Pa to 443.75 k Pa,a decrease of 43.74%;the peak pressure of quartz glass was reduced from the original peak value of 725.00 k Pa to 438.75 k Pa,a decrease of 38.48%.(4)For tempered glass,high borosilicate glass,and quartz glass,whether it is a quasi-static compression test or dynamic load loading test,the compression capacity from strong to weak in this order for tempered glass,high borosilicate glass,quartz glass.However,compared to the quasi-static test,the compression strength of each glass material was enhanced when the impact resistance test was performed.Comparing the different responses of Plexiglas in quasi-static compression and dynamic load loading,it exhibited a significant dynamic brittleness.During quasi-static loading,the cracks have sufficient time to nucleate and expand.In contrast,once high-speed dynamic impact loading is performed,it is difficult to meet the energy required to fracture the material at higher strain rates.This results in the need to load higher stresses to fracture the material.At this point,the material subjectively exhibits a gradual increase in compressive strength as the strain rate increases.(5)Diameter 160 mm,18mm thick high borosilicate glass,and quartz glass have good anti-burst performance,can meet the experimental requirements of anti-burst and impact.But because of the experiment,the combustion chamber temperature can be as high as 1200℃,which is in the engineering test of the combustion chamber observation window glass material using quartz glass.Because of engineering practice,the need to use circulating cold air around the observation hole sight glass cooling technology.In the long time system operation,no glass burst,cracks,and other phenomena,that is,to verify the existing glass window explosion-proof,temperature-resistant technical measures to meet the actual needs.Figure [49] table [23] reference [102]...