【摘要】 此丈对不同成形条件下压制得到的矩形双曲扁壳进行了抗凹试验,分析了载荷--位移试验曲线的特征,零件凹陷特点及失稳模式,得到了反映抗凹刚度和稳定性的特征参数及其和零件几何的关系,并讨论了改善和提高覆盖件抗凹刚度和稳定性的措施。更多还原

【Abstract】 Using an experimental system of sinking resistance of panel,a series of experiments on sinking process are conducted with the different rectangular double curvature panels shich are pressed in various forming conditions. The parameters characterizing sinking stiffness & stability of the panel have been observed by means of the load vs displacement curve in the case of continuous concentrated loading. Relationships between them and the central arc height are revealed. At last, some efficient ways to improve sinking stiffness & stability have been discussed.更多还原