CN117261372B - 一种高弹道性能生物启发夹芯板及其制备方法 - Google Patents
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Abstract
本发明公开了一种高弹道性能生物启发夹芯板及其制备方法,高弹道性能生物启发夹芯板是在传统夹芯板层间或表面增加橡胶层,传统夹芯板由依次排列的铝板层、泡沫铝层和铝板层三层结构组成。用砂纸打磨铝板中与泡沫铝或橡胶接触的一面并且用丙酮擦拭铝板,各层结构采用Bylamet S2粘接,粘接完成后施加压力保证粘接牢固,得高弹道性能生物启发夹芯板。本发明利用天然橡胶复合物在冲击载荷下的抗撕裂,抗穿刺的特性及与铝板间的界面失效来增强传统夹芯板中泡沫铝与铝板的变形程度,改善了传统夹芯板中铝板及泡沫铝的破坏模式,最大程度的发挥了传统夹芯板中各部件在抵抗弹丸冲击过程中的作用,从而改善了传统夹芯板的弹道性能。
Description
技术领域
本发明属于夹芯板材料技术领域,具体涉及一种高弹道性能生物启发夹芯板及其制备方法。
背景技术
在世界范围内,爆炸和破片弹丸损伤数量的增加对防护结构提出了严峻的挑战。在飞机、高铁、国防工程、军用车辆、舰船等领域不可避免地会遭受弹丸、鸟类、冰雹、爆炸产物、破片等冲击作用,对关键设备和人身安全造成不同程度的威胁。因此,对具有高抗弹力的防护结构的需求日益增加。为满足这一需求,人们从各个方面来提升结构的抗弹性能,导致了许多CFRP,凯夫拉纤维等新型材料和夹芯结构,层合板等防护结构的出现。传统的夹芯结构由硬质上下面板和多孔芯材组成,作为一种弹道性能显著的防护结构,仍然存在一定的劣势。这是因为传统夹芯板在弹体周边发生高度局部塑性变形的剪切破坏,导致结构的弹道性能不佳。
在某些生物结构中,除了包含上述组成传统夹芯板的硬质材料和多孔材料以外还包含一类软质材料。在生物启发结构中这一类软质材料通常由天然橡胶制成。这是由于天然橡胶具有显著的阻尼特性、灵活性和特殊的抗穿刺和抗撕裂性,在众多工程应用中是一个受欢迎的选择。但是,由于相关研究的缺乏以及天然橡胶添加位置的多样性,可能会导致结构拥有不同的弹道性能。
因此,考虑天然橡胶与传统夹芯板的之间的作用,提供一种优化方法及生物启发下的夹芯结构,来改善传统夹芯板破坏模式进而提高结构的抗弹性能是很有必要的。
发明内容
针对现有技术中传统夹芯板作为一种弹道性能显著的防护结构局部塑性变形导致弹道性能不佳的问题,本发明提供了一种高弹道性能生物启发夹芯板及其制备方法,改善了夹芯板中铝板及泡沫铝的破坏模式,最大程度的发挥了夹芯板中各部件在抵抗弹丸冲击过程中的作用。
本发明通过以下技术方案实现:
一种高弹道性能生物启发夹芯板,具体为在传统夹芯板层间或表面增加橡胶层;所述的传统夹芯板由依次排列的铝板层、泡沫铝层和铝板层三层结构组成。
进一步地,所述的橡胶层位于传统夹芯板铝板的上表面。
进一步地,所述的铝板层厚度为0.3~0.6mm、泡沫铝层的厚度为20~40mm、橡胶层的厚度为2~4mm。
本发明中,上述高弹道性能生物启发夹芯板的制备方法,具体为:用砂纸打磨铝板中与泡沫铝或橡胶接触的一面并且用丙酮擦拭铝板,各层结构采用Bylamet S2粘接,粘接完成后施加压力保证粘接牢固,得高弹道性能生物启发夹芯板。
进一步地,各层粘接牢固后在室温下静置72h,得高弹道性能生物启发夹芯板。
本发明取得的有益效果为:
本发明在传统夹芯板的基础上,充分利用橡胶层的阻尼性、灵活性和特殊的抗穿刺和抗撕裂性,并结合弹丸冲击载荷下结构的破坏特征及破坏机理来确定天然橡胶复合物在传统夹芯板中的位置,得到对传统夹芯板弹道性能优化程度最大的生物启发夹芯板。利用天然橡胶复合物在冲击载荷下的抗撕裂,抗穿刺的特性及与铝板间的界面失效来增强传统夹芯板中泡沫铝与铝板的变形程度,改善了传统夹芯板中铝板及泡沫铝的破坏模式,最大程度的发挥了传统夹芯板中各部件在抵抗弹丸冲击过程中的作用,从而改善了传统夹芯板的弹道性能。
附图说明
图1为实施例1制备的生物启发夹芯板示意图;
图2为生物启发夹芯板和传统夹芯板弹丸剩余速度指标图,A表示铝,R表示橡胶,F表示泡沫铝;
图3为生物启发夹芯板和传统夹芯板单位质量结构吸能性能影响的指标图;
图4为天然橡胶复合物添加后对各部件能量吸收的影响图;
图5为生物启发夹芯板和传统夹芯板等效塑性应变的对比图;
图6为生物启发夹芯板中天然橡胶复合物变形程度的对比图;
图7为天然橡胶复合物添加后对夹芯板各部件破坏模式的影响图。
具体实施方式
为使本申请的上述目的,方法,优点能够更加通俗易懂,下面结合附图和具体的实施方式对本申请进一步的详细说明。
下列各实施例中使用的铝板、泡沫铝和橡胶的材料是相同的,均为商业化的材料其中铝板为高延性和合理强度的铝合金;泡沫铝为闭孔泡沫铝,橡胶为天然橡胶复合物,实施例中使用的铝板、泡沫铝和天然橡胶复合物的力学性能如表1、表2和表3所示:
表1 铝板的力学性能
表2 泡沫铝的力学性能
表3天然橡胶复合物的力学性能
现结合实施例对生物启发夹芯板的制备方法进行阐述。
实施例1
(1)将泡沫铝上下表面分别与铝板进行粘接,在粘接之前用砂纸打磨铝板中与泡沫铝接触的一面并且用丙酮擦拭,之后采用Bylamet S2粘接剂粘接,粘接完成后施加压力保证粘接牢固;
(2)将上层铝板的上表面用丙酮擦拭,并且用Bylamet S2与天然橡胶复合物粘接,后施加7kPa压力,保证粘接牢固;
(3)步骤(2)结束后,在室温下静置72h,得到生物启发夹芯板RRAFA,其结构示意图如图1所示,其中R(RR)为天然橡胶复合物层,厚度为4mm;A为铝板层,厚度为0.5mm;F为泡沫铝层,厚度为30mm。
实施例2
调整实施例1步骤顺序,将天然橡胶复合物与铝板进行粘接,得到铝板-天然橡胶复合物复合板,在泡沫铝的上方,使用Bylamet S2粘接剂将铝板-天然橡胶复合物复合板中天然橡胶复合物的一侧与泡沫铝的上侧粘接,泡沫铝的下侧与铝板的一侧粘接,粘结牢固后,室温下静置72h,得到生物启发夹芯板ARFAR,其中两层天然橡胶复合物R的厚度均为2mm,两层铝板A的厚度均为0.5mm和泡沫铝F的厚度为30mm。
实施例3
调整实施例1步骤顺序,将铝板和天然橡胶复合物复合粘结得铝板-天然橡胶复合物板,在泡沫铝的上方,使用Bylamet S2粘接剂将铝板-天然橡胶复合物复合板中天然橡胶复合物的一侧与泡沫铝的上侧粘接,泡沫铝的下侧同样与天然橡胶复合物的一侧粘接,粘结牢固后,室温下静置72h,得到生物启发夹芯板ARFRA,其中两层天然橡胶复合物R的厚度均为2mm,两层铝板A的厚度均为0.5mm和泡沫铝F的厚度为30mm。
实施例4
调整实施例1步骤顺序,将铝板和天然橡胶复合物复合粘结得铝板-天然橡胶复合物板,在泡沫铝的上方,使用Bylamet S2粘接剂将铝板-天然橡胶复合物复合板中铝板的一侧与泡沫铝的上侧粘接,泡沫铝的下侧同样与铝板的一侧粘接,粘结牢固后,室温下静置72h,得到生物启发夹芯板RAFAR,其中两层天然橡胶复合物R的厚度均为2mm,两层铝板A的厚度均为0.5mm和泡沫铝F的厚度为30mm。
实施例5
调整实施例1步骤顺序,将铝板和天然橡胶复合物复合粘结得铝板-天然橡胶复合物板,在泡沫铝的上方,使用Bylamet S2粘接剂将铝板-天然橡胶复合物复合板中铝板的一侧与泡沫铝的上侧粘接,泡沫铝的下侧与天然橡胶复合物的一侧粘接,粘结牢固后,室温下静置72h,得到生物启发夹芯板RAFRA,其中两层天然橡胶复合物R的厚度均为2mm,两层铝板A的厚度均为0.5mm和泡沫铝F的厚度为30mm。
实施例6
调整实施例1步骤顺序,将铝板和天然橡胶复合物复合粘结得铝板-天然橡胶复合物板,在泡沫铝的上方,使用Bylamet S2粘接剂将铝板-天然橡胶复合物复合板中天然橡胶复合物的一侧与泡沫铝的上侧粘接,泡沫铝的下侧与铝板粘接,粘结牢固后,室温下静置72h,得到生物启发夹芯板ARRFA,其中天然橡胶复合物R(RR)的厚度为4mm,两层铝板A的厚度均为0.5mm和泡沫铝F的厚度为30mm。
对比例1
按照实施例1步骤(1)制备传统夹芯板AFA,两层铝板的厚度均为0.5mm,泡沫铝的厚度为30mm。
性能测试
对实施例和对比例制备的生物启发夹芯板和传统夹芯板的性能进行测试。采用商业软件LS-DYNA进行建模及求解。通过*MAT_RIGID来模拟半球形刚性弹丸,弹丸的初始速度为120m/s,质量为17.42g,弹丸的长度为30mm,弹丸直径为10mm,生物启发夹芯板的弹道性能通过弹丸剩余速度及结构单位质量能量吸收的能力来评估,图2为生物启发夹芯板和传统夹芯板对结构弹丸剩余速度影响的指标图,图3为生物启发夹芯板和传统夹芯板对单位质量结构吸能性能影响的指标图,测试数据如表4所示;
表4 传统夹芯板与生物启发夹芯板弹道性能测试结果
由图2、图3和表4可知,在弹丸冲击载荷的作用下,6种生物启发夹芯板的弹丸剩余速度从小到大依次是RRAFA,RAFRA,RAFAR,ARRFA,ARFRA,ARFAR,均比传统夹芯板的弹丸剩余速度小。当天然橡胶复合物位于铝板上方时,单位质量结构吸能性能更为优异,并且6种生物启发夹芯板的单位质量结构吸能性能要优于传统夹芯板,即天然橡胶复合物的添加优化了传统夹芯板,当天然橡胶复合物位于传统夹芯板的上侧时,生物启发夹芯板具有最优的弹道性能。
图4为天然橡胶复合物添加后对生物启发夹芯板(RRAFA)各部件能量吸收的影响图。如图4所示,天然橡胶复合物添加后对上层铝板与泡沫铝的影响最大,使泡沫铝和铝板的能量吸收能力得到了大幅度的提高。
图5为生物启发夹芯板及传统夹芯板的等效塑性应变的对比图,图6为生物启发夹芯板中天然橡胶复合物变形程度的对比图。由图5可知,在弹丸冲击载荷的作用下,实施例中的天然橡胶复合物位于铝板下方时,铝板发生剪切破坏,并有剪切塞出现。相反,天然橡胶复合物位于铝板上方时,在天然橡胶复合物的作用下铝板发生大程度的拉伸撕裂变形,这在ARRFA结构与RRAFA结构的对比中最为明显,导致了天然橡胶复合物位于铝板上方的这类结构有更好的弹道性能。结合图6可知,天然橡胶复合物位于铝板上方时,天然橡胶复合物的变形程度更大,能够更好的促进铝板和泡沫铝的变形,导致这类结构有更好的弹道性能。
图7是天然橡胶复合物添加后对夹芯板各部件破坏模式的影响图。由图7可知,天然橡胶复合物的加入后明显的改善了泡沫铝和铝板的变形程度,从而使结构的能量吸收性能与弹道性能得到明显的改善。
Claims (3)
1.一种高弹道性能生物启发夹芯板,其特征在于,在传统夹芯板层间或表面增加橡胶层;所述的传统夹芯板由依次排列的铝板层、泡沫铝层和铝板层三层结构组成;
所述的橡胶层位于传统夹芯板铝板的上表面;
所述的铝板层厚度为0.3 ~ 0.6mm、泡沫铝层的厚度为20 ~ 40mm、橡胶层的厚度为2 ~4mm。
2.根据权利要求1所述的高弹道性能生物启发夹芯板的制备方法,其特征在于,用砂纸打磨铝板中与泡沫铝或橡胶接触的一面并且用丙酮擦拭铝板,各层结构采用Bylamet S2粘接,粘接完成后施加压力保证粘接牢固,得高弹道性能生物启发夹芯板。
3.根据权利要求2所述的高弹道性能生物启发夹芯板的制备方法,其特征在于,各层粘接牢固后在室温下静置72h,得高弹道性能生物启发夹芯板。
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