论文部分内容阅读
为得到金属面夹芯板在爆炸作用下的动力响应,采用能量平衡原理和有限元分析相结合的方法对其进行研究。基于夹芯板在爆炸作用下的破坏特点,将其变形过程分为弯剪变形、弹性拉伸变形、塑性拉伸变形和拉伸断裂4个阶段。理论推导给出夹芯板全过程的变形公式,并给出了变形公式中主要阶段荷载的取值,即受拉爆炸荷载、屈服爆炸荷载和断裂爆炸荷载。采用有限元方法得到各参数对夹芯板抗爆性能的影响,并对夹芯板变形计算公式进行了验证。分析结果表明:夹芯板变形随爆炸作用的增加而增加,随着面板厚度、芯材厚度、芯材强度和板跨长度的增加而减小,而剪切模量对夹芯板变形影响较小。
In order to obtain the dynamic response of the metal-faced sandwich panel under the action of explosion, the energy balance principle and the finite element analysis are used to study the dynamic response. Based on the failure characteristics of the sandwich panel under the action of explosion, the deformation process is divided into four stages: bending shear deformation, elastic tensile deformation, plastic tensile deformation and tensile fracture. The deformation formula of the whole process of the sandwich panel is deduced theoretically, and the values of the main stage loads in the deformation formula are given, that is, the tensile load, the yield explosion load and the fracture explosion load. The influence of each parameter on the antiknock performance of the sandwich panel was obtained by the finite element method. The deformation formula of the sandwich panel was also verified. The analysis results show that the deformation of the sandwich panel increases with the increase of the explosion and decreases with the increase of the thickness of the panel, the thickness of the core, the strength of the core and the span of the span, while the influence of the shear modulus on the deformation of the sandwich panel small.