Method to measure the failure pressures of hollow glass microspheres with high aspect ratios
An experimental method, pressure loading by steps, was designed to measure the fracture and buckling failure pressures of hollow glass microspheres(HGM) for use in laser fusion experiments. The failure pressures of 3 kinds of HGM with out diameters of 350-550μm and wall thickness less than 1.1μm and the HGM glass's elastic moduli and tensile strengthes were measured experimentally. From these results, experimental formulae were obtained to evaluate the failure pressures of HGM in different out diameter and wall thickness without any test. Moreover, the experimental error sources and ways to improve them are discussed.