CN114147995A - 一种二维全封闭复合材料点阵夹层结构及其整体成型方法 - Google Patents
一种二维全封闭复合材料点阵夹层结构及其整体成型方法 Download PDFInfo
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Abstract
本发明公开一种二维全封闭复合材料点阵夹层结构及其整体成型方法,属于复合材料构件制造技术领域,该结构包括由复合材料制成的点阵夹层结构以及将点阵夹层结构夹在中间的上面板和下面板;该点阵夹层结构包含相对的两个面,每个面由多个点阵分布的凸起结构和凹陷结构组成一连续的整体。本发明通过整体成型二维全封闭复合材料点阵夹层结构,提高复合材料点阵结构的承载能力以及轻量化水平,以高效低成本工艺制造获得高质量的复合材料点阵结构。
Description
技术领域
本发明属于属于复合材料构件制造技术领域,具体涉及一种二维全封闭复合材料点阵夹层结构及其成型方法。
背景技术
点阵结构是为了满足工程结构轻型化和多功能化要求而设计出来的一种新型结构。它具有高比刚度、高比强度、可设计性强以及满足多功能化需求的优点。因此,点阵结构被认为是最有应用前景的新一代先进、轻质、超强韧多功能结构。
目前,点阵结构的制备主要以金属材料为主,复合材料点阵结构通常采用零件组配成型,特别对于具有更好传载特性的二维全封闭复合材料点阵结构,其一体化成型方法研究较少,无法体现出新一代复合材料的轻质高强特性。因此,要如何解决上述现有的问题与缺失,即为相关业者所亟待研发的问题所在。
发明内容
本发明的主要目的在于提出一种二维全封闭复合材料点阵夹层结构及其整体成型方法,通过整体成型二维全封闭复合材料点阵夹层结构,提高复合材料点阵结构的承载能力以及轻量化水平,以高效低成本工艺制造获得高质量的复合材料点阵结构。
为达到上述目的,本发明提供的技术方案是:
一种二维全封闭复合材料点阵夹层结构,包括由复合材料制成的点阵夹层结构以及将点阵夹层结构夹在中间的上面板和下面板;该点阵夹层结构包含相对的两个面,每个面由多个点阵分布的凸起结构和凹陷结构组成一连续的整体,其中一个凸起结构被若干个凹陷结构包围,一个凹陷结构被同等数量的若干个凸起结构包围;一个面的凸起结构和凹陷结构对应地为另一个面的凹陷结构和凸起结构,每个面的凸起结构的顶部为粘接面,一个面的全部凸起结构的粘接面粘接上面板,另一个面的全部凸起结构的粘接面粘接下面板。
优选地,凸起结构和凹陷结构为正三棱台型、正四棱台型或正六棱台型;当为正三棱台型时,一个凸起结构被三个凹陷结构包围,一个凹陷结构被三个凸起结构包围;当为正四棱台型时,一个凸起结构被四个凹陷结构包围,一个凹陷结构被四个凸起结构包围;当为正六棱台型时,一个凸起结构被六个凹陷结构包围,一个凹陷结构被六个凸起结构包围。
优选地,点阵夹层结构的面倾斜角即凸起结构和凹陷结构的侧面与上、下面板所在平面的夹角大于0°,小于90°,优选45°。
优选地,点阵夹层结构厚度在毫米量级。
一种二维全封闭复合材料点阵夹层结构的整体成型方法,包括以下步骤:
1)根据点阵夹层结构的凸起结构和凹陷结构特点,布置经纱和纬纱纤维比例,通过机器编织形成复合材料点阵夹层结构预制体;
2)采用双面模成型工艺对点阵夹层结构设计并加工面板成型模具;
3)以上面板下型面和下面板上型面作为面板成型模具的基准面进行面板成型模具的设计和加工;
4)根据点阵夹层结构的上、下面板的结构形式进行复合材料预浸料料片的裁剪;
5)在面板成型模具上进行预浸料料片的铺覆,然后采用单面模工艺成型上下面板;
6)设计上、下面板和点阵夹层结构的粘接工装,通过该粘接工装的一厚度调节杆实现粘接压力的施加以及夹层厚度的精确控制;
7)通过粘接工装将上、下面板和点阵夹层结构进行整体胶结成型,形成二维全封闭复合材料点阵夹层结构。
优选地,复合材料点阵夹层结构采用高强中模级碳纤维,包括T300、T700、T800或T1100;或者选用高强高模级碳纤维,包括M40J或M55J;或者采用无机纤维(如玻璃纤维)或碳纤维以外的其他有机纤维。
优选地,上、下面板采用树脂基复合材料面板。
优选地,点阵夹层结构和上、下面板的粘接位置应预留不大于0.2mm的粘接间隙,该间隙通过结构胶进行填补。
优选地,面板成型模应选用具有一定硬度的模具材料,如P20模具钢等。
优选地,双面模成型工艺为RTM或模压;如采用RTM工艺,则在RTM面板成型模具内设置多道密封绳开槽,以保证RTM型腔密封性;RTM面板成型模具具有注胶口、出胶口等特征。
优选地,单面模成型工艺为真空袋压或热压罐工艺。
优选地,整体胶结成型采用二次胶结工艺或共胶结工艺。
综上所述,本发明采用机器编织的二维全封闭点阵结构预制体应在面内具有一定延展性,使得预制体在模具中具有短程调节特性以适应起伏不平的结构特点。本发明可根据结构的剪切传载特性和轻量化水平要求进行调整,角度调整范围为0至90度之间,其中具有较好剪切传载特性、较高的轻量化水平以及友好的工艺成型的面倾斜角度为45°。本发明采用整体胶结成型的点阵结构具有很好的承载特性,避免了由零组件组装形成结构的带来的应力传递不连续等问题,可解决现有技术的不足与缺失,提高点阵结构在面内各个方向的承载效率。二维全封闭复合材料点阵夹层结构的工艺制造方法简便可行,省去了复杂的装配组装过程,具有高效低成本的突出优势。
附图说明
图1是一种二维全封闭复合材料点阵夹层结构示意图。
图2是点阵夹层结构示意图。
图3是点阵夹层结构横截面示意图。
具体实施方式
为使本发明的上述特征和优点能更明显易懂,下文特举实施例,并配合所附图作详细说明如下。
本实施例公开一种二维全封闭复合材料点阵夹层结构1,如图1所示,包括由复合材料制成的点阵夹层结构1以及将点阵夹层结构1夹在中间的上面板2和下面板3。该点阵夹层结构1包含相对的两个面,每个面由多个点阵分布的凸起结构11和凹陷结构12组成一连续的整体,凸起结构11和凹陷结构12为正四棱台型,其中一个凸起结构11被四个凹陷结构12包围,一个凹陷结构12被四个凸起结构11包围,如图2所示。在其他实施例中也可以为正三棱台型或正六棱台型,当为正三棱台型时,一个凸起结构11被三个凹陷结构12包围,一个凹陷结构12被三个凸起结构11包围;当为正六棱台型时,一个凸起结构11被六个凹陷结构12包围,一个凹陷结构12被六个凸起结构11包围。一个面的凸起结构11和凹陷结构12对应地为另一个面的凹陷结构12和凸起结构11,每个面的凸起结构11的顶部为粘接面13,一个面的全部凸起结构11的粘接面13粘接上面板2,另一个面的全部凸起结构11的粘接面13粘接下面板3。该点阵夹层结构1厚度在毫米量级。如图3所示,该点阵夹层结构1的面倾斜角θ即凸起结构11和凹陷结构12的侧面与上、下面板3所在平面的夹角大于0°,小于90°,本实施例中为45°。
本实施例还公开了一种二维全封闭复合材料点阵夹层结构的整体成型方法,包括以下步骤:
1)根据点阵夹层结构的凸起结构和凹陷结构特点,布置经纱和纬纱纤维比例,通过机器编织形成复合材料点阵夹层结构预制体,复合材料点阵夹层结构采用高强中模级碳纤维T300。
2)采用双面模成型工艺RTM,对点阵夹层结构设计并加工面板成型模具,该模具采用P20模具钢。在RTM面板成型模具内设置多道密封绳开槽,以保证RTM型腔密封性;RTM面板成型模具具有注胶口、出胶口等特征。
3)以上面板下型面和下面板上型面作为面板成型模具的基准面进行面板成型模具的设计和加工。
4)根据点阵夹层结构的上、下面板的结构形式进行复合材料预浸料料片的裁剪,上、下面板采用树脂基复合材料面板。
5)在面板成型模具上进行预浸料料片的铺覆,然后采用单面模热压罐工艺成型上下面板。
6)设计上、下面板和点阵夹层结构的粘接工装,通过该粘接工装的一厚度调节杆实现粘接压力的施加以及夹层厚度的精确控制;点阵夹层结构和上、下面板的粘接位置应预留不大于0.2mm的粘接间隙,该间隙通过结构胶进行填补。
7)通过粘接工装将上、下面板和点阵夹层结构进行二次胶结整体胶结成型,形成二维全封闭复合材料点阵夹层结构。
虽然本发明已以实施例公开如上,然其并非用以限定本发明,本领域的普通技术人员对本发明的技术方案进行的适当修改或者等同替换,均应涵盖于本发明的保护范围内,本发明的保护范围以权利要求所限定者为准。
Claims (10)
1.一种二维全封闭复合材料点阵夹层结构,其特征在于,包括由复合材料制成的点阵夹层结构以及将点阵夹层结构夹在中间的上面板和下面板;该点阵夹层结构包含相对的两个面,每个面由多个点阵分布的凸起结构和凹陷结构组成一连续的整体,其中一个凸起结构被若干个凹陷结构包围,一个凹陷结构被同等数量的若干个凸起结构包围;一个面的凸起结构和凹陷结构对应地为另一个面的凹陷结构和凸起结构,每个面的凸起结构的顶部为粘接面,一个面的全部凸起结构的粘接面粘接上面板,另一个面的全部凸起结构的粘接面粘接下面板。
2.如权利要求1所述的二维全封闭复合材料点阵夹层结构,其特征在于,凸起结构和凹陷结构为正三棱台型、正四棱台型或正六棱台型;当为正三棱台型时,一个凸起结构被三个凹陷结构包围,一个凹陷结构被三个凸起结构包围;当为正四棱台型时,一个凸起结构被四个凹陷结构包围,一个凹陷结构被四个凸起结构包围;当为正六棱台型时,一个凸起结构被六个凹陷结构包围,一个凹陷结构被六个凸起结构包围。
3.如权利要求1所述的二维全封闭复合材料点阵夹层结构,其特征在于,点阵夹层结构的面倾斜角即凸起结构和凹陷结构的侧面与上、下面板所在平面的夹角大于0°,小于90°。
4.如权利要求1所述的二维全封闭复合材料点阵夹层结构,其特征在于,点阵夹层结构厚度在毫米量级。
5.一种二维全封闭复合材料点阵夹层结构的整体成型方法,用于成型权利要求1-4任一项所述的二维全封闭复合材料点阵夹层结构,其特征在于,该方法包括以下步骤:
1)根据点阵夹层结构的凸起结构和凹陷结构特点,布置经纱和纬纱纤维比例,通过机器编织形成复合材料点阵夹层结构预制体;
2)采用双面模成型工艺对点阵夹层结构设计并加工面板成型模具;
3)以上面板下型面和下面板上型面作为面板成型模具的基准面进行面板成型模具的设计和加工;
4)根据点阵夹层结构的上、下面板的结构形式进行复合材料预浸料料片的裁剪;
5)在面板成型模具上进行预浸料料片的铺覆,然后采用单面模工艺成型上下面板;
6)设计上、下面板和点阵夹层结构的粘接工装,通过该粘接工装的一厚度调节杆实现粘接压力的施加以及夹层厚度的精确控制;
7)通过粘接工装将上、下面板和点阵夹层结构进行整体胶结成型,形成二维全封闭复合材料点阵夹层结构。
6.如权利要求5所述的方法,其特征在于,复合材料点阵夹层结构采用高强中模级碳纤维,包括T300、T700、T800或T1100;或者选用高强高模级碳纤维,包括M40J或M55J;或者
采用无机纤维或碳纤维以外的其他有机纤维;上、下面板采用树脂基复合材料面板。
7.如权利要求5所述的方法,其特征在于,点阵夹层结构和上、下面板的粘接位置预留不大于0.2mm的粘接间隙,该间隙通过结构胶进行填补。
8.如权利要求5所述的方法,其特征在于,面板成型模采用P20模具钢。
9.如权利要求5所述的方法,其特征在于,双面模成型工艺为RTM或模压;如采用RTM工艺,则在RTM面板成型模具内设置多道密封绳开槽;单面模成型工艺为真空袋压或热压罐工艺。
10.如权利要求5所述的方法,其特征在于,整体胶结成型采用二次胶结工艺或共胶结工艺。
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