The Tensile Properties of PVB at Intermediate Strain Rate Using the In-situ Hopkinson Bar
Polyvinyl butyral (or PVB) is commonly used as interlayer in architectural laminated glass and windshield in automobiles for its strong binding, optical clarity, adhesion to many surfaces, toughness and flexibility.A modified in-situ Hopkinson bar system is used to measure the tensile properties of the PVB with the strain rates of 30~100 S-1.In this system, a high impedance striker tube with the rubber pulse shaper is use to generate a long loading pulse of 50ms.Two X-cut quartz piezoelectric force transducers are sandwiched between the specimen and two bars respectively to directly measure the dynamic loading forces, and the strain field of the specimen is calculated by the Digital Image Correlation (DIC) method via photos obtained by the high speed camera.The local deformation of the full-field specimen was clearly displayed and the fracture strain of the specimen was evaluated.The results show that the tensil strengths of the PVB increase with increasing loading strain rates.
Polyvinyl butyral tensile stress-strain Hopkinson bar
K.Li R.Chen H.Zhang X.Wen
College of Science, National University of Defense Technology, Changsha, China
国际会议
北京
英文
80-87
2014-10-19（万方平台首次上网日期，不代表论文的发表时间）