In this study,the infuence of solid particle erosion on the fracture strength of low density polyethylene(LDPE)film under con-trolled conditions is investigated through impact experiments.The variations in the residua...In this study,the infuence of solid particle erosion on the fracture strength of low density polyethylene(LDPE)film under con-trolled conditions is investigated through impact experiments.The variations in the residual fracture stress as well as the residual fracture strain of the LDPE flm after solid particle impact against the impact angle(α),impact velocity(νp)and impact duration(t)are analysed.The study revealed that the fracture stress and the fracture strain of the LDPE film decrease with an increase in the impact duration,and the degradation rate increases with the impact velocity and impact angle.Furthermore,the fracture stress and the fracture strain of LDPE film decrease exponentially against the impact energy under the same particle impact angle condition,and the reductions of fracture stress and fracture strain increase quasi-linearly with the sine-squared impact angle under the same impact energy.The study proposes empirical models to predict the attenuation of the fracture stress and the fracture strain of LDPE films due to the finite particle impact energy.展开更多
基金the National Natural Science Foundation of China(Grant Nos.92052202,and 11702122).
文摘In this study,the infuence of solid particle erosion on the fracture strength of low density polyethylene(LDPE)film under con-trolled conditions is investigated through impact experiments.The variations in the residual fracture stress as well as the residual fracture strain of the LDPE flm after solid particle impact against the impact angle(α),impact velocity(νp)and impact duration(t)are analysed.The study revealed that the fracture stress and the fracture strain of the LDPE film decrease with an increase in the impact duration,and the degradation rate increases with the impact velocity and impact angle.Furthermore,the fracture stress and the fracture strain of LDPE film decrease exponentially against the impact energy under the same particle impact angle condition,and the reductions of fracture stress and fracture strain increase quasi-linearly with the sine-squared impact angle under the same impact energy.The study proposes empirical models to predict the attenuation of the fracture stress and the fracture strain of LDPE films due to the finite particle impact energy.