钢板夹泡沫铝组合板抗弯性能研究

发布时间：2019-02-16 20:41

【摘要】：试验设计了6块钢板夹泡沫铝组合板,其中无侧板组合板与有侧板组合板各为3块,侧板材料与面板相同,泡沫铝芯层厚度分别为40 mm、60 mm和90 mm。对组合板进行抗弯试验,绘制了组合板跨中荷载-位移(P-δ)曲线,记录了组合板变形失效过程。基于Gibson模型最大承载力公式建立了无侧板组合板的失效模式图。推导了有侧板组合板最大承载力计算公式,建立了失效模式图。结果表明:泡沫铝芯层厚度越大,组合板承载力越高,加载刚度越大。建立的失效模式图可以较好预测组合板的失效模式。与无侧板组合板相比,仅增加侧板,可以显著提高组合板的承载能力和加载刚度,有效限制泡沫铝开裂后裂缝的进一步开展。通常无侧板组合板每种失效模式仅独立对应失效模式图中一块区域,而有侧板组合板失效模式图被划分为四块区域,且表皮屈服失效模式独立对应两块区域。
[Abstract]:Six aluminum foamed composite plates were designed and tested, in which there were 3 composite plates without side plates and 3 composite plates with side plates. The thickness of foamed aluminum core layer was 40 mm,60 mm and 90 mm., respectively, and the material of side plate was the same as that of panel. The bending test of composite plate was carried out, and the load-displacement (P- 未) curve of composite plate span was drawn, and the deformation failure process of composite plate was recorded. Based on the maximum bearing capacity formula of Gibson model, the failure mode diagram of composite plate without side plate is established. The formula of maximum bearing capacity of composite plate with side plate is derived, and the failure mode diagram is established. The results show that the higher the thickness of foamed aluminum core is, the higher the bearing capacity of composite plate is and the greater the loading stiffness is. The failure mode diagram can be used to predict the failure mode of composite plate. Compared with the composite plate without side plate, only increasing the side plate can significantly improve the bearing capacity and loading stiffness of the composite plate, and effectively limit the further development of cracks after aluminum foam cracking. Generally, each failure mode of composite plate without side plate corresponds to only one area in the failure mode diagram, while the failure mode diagram of composite plate with side plate is divided into four regions, and the epidermal yield failure mode corresponds to two regions independently.
【作者单位】：解放军理工大学国防工程学院;
【基金】：国家自然科学基金项目(51478469)
【分类号】：TG115.5

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