基于近场动力学方法的玻璃板冲击破坏数值模拟研究

Numerical simulation of glass panel impact damage based on peridynamics

基于近场动力学方法,考虑刚体冲击作用下材料损伤发生断裂破坏影响,建立了刚球冲击玻璃板的三维数值计算模型,并结合Kalthoff-Winkler试验,验证了计算模型的有效性。最后,探究了刚球初始冲击速度、刚球直径和玻璃板厚度等因素,对玻璃板的冲击破坏结构形态演化以及裂纹扩展机制的影响。研究结果表明,当初始冲击速度较小时,玻璃板裂纹表现为辐射状,随着冲击速度的增加,环向裂纹出现并逐渐形成复杂的裂纹网络。同时,玻璃板的裂纹长度和裂纹占比均随初始冲击速度的增加而增大,且近似呈线性关系。随着刚球直径的增加,其与玻璃板的接触范围扩大,致使玻璃板的损伤程度加剧,且更易形成结构复杂的裂纹网络。此外,增加玻璃板的厚度会延长冲击持续时间,使得玻璃板承受更大的冲击能,从而导致板厚较小时局部结构损伤严重,但整体影响范围较小;而板厚较大时结构损伤的影响范围扩大,局部损伤则有所减弱。

Based on the peridynamics method,a three-dimensional numerical model for rigid ball impact on glass panel was proposed considering the effects of material damage.And the effectiveness of the presented model was verified according to the Kalthoff-Winkler experiment.Finally,the impact failure evolution and crack propagation mechanism of the glass panel were explored considering the effects of the rigid ball initial impact velocity,the rigid ball diameter,and the glass panel thickness.Results show that the cracks in the glass panel exhibit a radial shape when the initial impact velocity is low.As the impact velocity increases,the circumferential cracks appear and a complex crack network gradually form in the glass panel.Meanwhile,the total length and the proportion of cracks in the glass panel increase with initial impact velocity,and the relationship between them is approximately linear.With the increasing of the rigid ball diameter,the contact area between the ball and the glass panel expands,which results in more severe damage and easier formation of complex crack networks in the glass panel.In addition,increasing the glass panel thickness can prolong the impact duration,which makes the glass panel withstand greater impact energy.When the glass panel thickness is relatively thin,it results in more severe local structural damage and the smaller damage area.When the panel thickness is thicker,the structural damage area expands,while local damage weakens.