CN112710193A - 一种小凹陷抗冲击仿生防弹头盔 - Google Patents
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Abstract
本发明属于防护防弹装备技术领域,尤其涉及一种小凹陷抗冲击仿生防弹头盔,包括自外层至内层依次叠置的硬质抗冲击层、软质吸能层、复合层、内衬层;硬质抗冲击层、软质吸能层、复合层与内衬层之间采用胶接的方式连接;软质吸能层内部沿环向设置多列第一通孔,多列第一通孔呈梯度排布;复合层内部沿环向设置多列第二通孔,多列第二通孔交错设置,且第二通孔内填充柔性材料。其中,抗冲击层能够缓冲掉子弹的大部分冲击能;软质吸能层通过大变形吸收冲击能;复合层通过硬质材料减轻凹陷程度避免了对人体损伤,同时利用柔性材料实现吸收冲击能的目的;内衬层能够减小子弹对头部的冲击,降低对人体的伤害。
Description
技术领域
本发明属于防护防弹装备技术领域,尤其涉及一种小凹陷抗冲击仿生防弹头盔。
背景技术
现如今,武器装备越来越先进,对人体的杀伤力也随之增加,单兵的生命安全受到严重威胁。其中,头部的防护对于保障单兵生命安全具有极为重要的意义,而防弹头盔作为一种主要的头部防护装备,亟待进一步发展以抵御杀伤力日益增加的武器装备,提高防护性能。
防弹头盔根据盔壳材质的不同,大致可分为金属防弹头盔、非金属防弹头盔和金属与非金属复合防弹头盔。目前,应用于军队的军用级别的防弹头盔主要为超高分子量聚乙烯(U-PE)和聚苯二甲酰苯二胺(芳纶)两种防弹头盔。这两种防弹头盔相较于旧式钢盔更加轻便、舒适,防护性能也得到很大的提升。然而在实测过程中发现,这两种头盔虽能够抵挡住子弹的穿透,但弹着点的向内凹陷变形较大,会对头部造成重大冲击,导致人体出现一系列问题,造成不可逆转的伤害。
为此,亟需提出一种可以减小头盔内陷深度,加强防弹头盔防护性能的仿生防弹头盔。
发明内容
(一)要解决的技术问题
针对现有防弹头盔存在的内陷深度大、抗冲击性能差的技术问题,本发明提供一种小凹陷抗冲击仿生防弹头盔。
(二)技术方案
为了达到上述目的,本发明采用的主要技术方案包括:
一种小凹陷抗冲击仿生防弹头盔,包括自外层至内层依次叠置的硬质抗冲击层、软质吸能层、复合层、内衬层;硬质抗冲击层、软质吸能层、复合层与内衬层之间采用胶接的方式连接;软质吸能层内部沿环向设置多列第一通孔,多列第一通孔呈梯度排布;复合层内部沿环向设置多列第二通孔,多列第二通孔交错设置,且第二通孔内填充柔性材料。
进一步地,硬质抗冲击层采用硬质陶瓷、轻质合金中的一种制成。
进一步地,软质吸能层采用海绵、橡胶、乳胶中的一种或多种制成。
进一步地,第一通孔的横截面为平行四边形,且平行四边形的边长为0.1mm~0.8mm。
进一步地,相邻两个第一通孔的上下孔间距为0.5mm~1mm。
进一步地,复合层由硬质材料和柔性材料制成;硬质材料采用硬质陶瓷、硬质合金中的一种;柔性材料为粘弹性材料。
进一步地,粘弹性材料为硅橡胶。
进一步地,第二通孔的横截面为正方形,且正方形的边长为2mm~4mm。
进一步地,相邻的两个第二通孔的上下孔间距为0.5mm~1.5mm。
进一步地,内衬层采用形状记忆聚合物纤维制成。
(三)有益效果
本发明的有益效果是:本发明提供的一种小凹陷抗冲击仿生防弹头盔,头盔布置为四层。其中抗冲击层作为最外层,选用硬质陶瓷,缓冲掉子弹的大部分冲击能。软质吸能层作为次外层,受到冲击时,通过大变形吸收冲击能;其中,软质吸能层内部的第一通孔在层间呈梯度排布,实现中部大变形,外部小变形,利于异质材料间的过渡粘接,避免层间脱层。复合层作为次内层,较大多数吸能层选用柔性材料通过大变形吸收冲击能的情况,优势在于通过硬质材料减轻凹陷程度避免了对人体损伤,同时利用柔性材料实现吸收冲击能的目的。内衬层作为内层,选用形状记忆聚合物纤维,受到冲击时,头盔弹着点周围温度迅速升温,形状记忆聚合物纤维发生变形,在弹着点附近向外凸起,抵抗冲击的同时远离头部,形成空腔,利于冲击应力向四周扩散,减小对头部的冲击,降低对人体的伤害。
附图说明
图1为啄木鸟头部示意图。
图2为本发明的小凹陷抗冲击仿生防弹头盔的结构示意图。
图3为图2中的A处放大横截面结构示意图。
【附图标记说明】
1、硬质抗冲击层;2、软质吸能层;3、第一通孔;4、复合层;5、第二通孔;6、内衬层。
具体实施方式
为了更好的解释本发明,以便于理解,下面结合附图,通过具体实施方式,对本发明作详细描述。其中,本文所提及的“外层”、“内层”等方位名词均以图3的定向为参照。“外层”指的是图3中右侧的一层,“内层”指的是图3中左侧的一层。
本发明受啄木鸟头部抗冲击结构的启发而来,它长期经受高频率撞击,其脑部未发生任何损伤,经进一步研究发现这是啄木鸟的喙、舌头以及头骨共同作用的结果。如图1所示,啄木鸟头部受到撞击时,应力传播首先经过啄木鸟喙部,作为一种刚性材料,耗散掉大部分的冲击能,后传递到舌头,作为柔性层,仅仅环绕整个头部,缓释掉一部分冲击能,最后传递到头骨,头骨为板状多孔结构,孔里面填充有大量粘弹性液体,粘液耗散掉剩余冲击能,同时由于头骨为硬质材料,受到冲击时变形小,内部脑子不易受到挤压。本发明的最外层实现并模仿了啄木鸟喙部,选用硬质抗冲击材料,耗散掉子弹大部分的冲击能;次外层实现并模仿了啄木鸟舌头,选用柔性吸能材质,通过大变形缓释能量;次内层实现并模仿了啄木鸟的头骨,为复合层,既缓释冲击能又实现小内陷,减低对头部的冲击和伤害;最内层作为内衬层,为保证舒适性的同时,达到小凹陷,故选用形状记忆聚合物纤维。本发明的头盔受到冲击时,弹着点周围温度升高,形状记忆聚合物纤维发生形变,在弹着点周围向外凸起,抵抗冲击同时远离头部,形成空腔,利于冲击能向四周扩散。
实施例1
如图2和图3所示,本发明提供一种小凹陷抗冲击仿生防弹头盔。该防弹头盔从外层到内层依次包含:硬质抗冲击层1、软质吸能层2、复合层4和内衬层6。
其中,硬质抗冲击层1选用具有高强度高硬度抗冲击的材料,例如:硬质陶瓷、轻质合金等。本实施例中硬质抗冲击层1选用硬质陶瓷;陶瓷为氧化铝、碳化硼或碳化硅中的一种,其中,碳化硼的各方面性能最好,故本实施例硬质抗冲击层1采用碳化硼陶瓷制得。碳化硼陶瓷板的强度非常大,被子弹撞击时会瞬间破碎,它依靠碎裂产生的裂纹来分散掉子弹的动能。
软质吸能层2选用海绵、橡胶和乳胶中的一种,其中聚氨酯软发泡橡胶作为海绵的一种,是生活中最常见的一种高分子材料,具有优异的吸能、减震、透气等性能,故本实施例中软质吸能层2优选地选用聚氨酯软发泡橡胶。
软质吸能层2内部设有多列第一通孔3,在受到冲击时,相较于没有孔的防弹头盔,孔隙随之发生压缩变形并不断挤压孔周,致使软质吸能层2发生变形,从而抵消外部的冲击力,降低对人体带来的伤害。
优选的,第一通孔3呈前后两端面为平行四边形的棱柱体,这里利用了平行四边形的不稳定性,利于大变形。本实施例中的第一通孔3的端面形状优选为正平行四边形,且正平行四边形的边长为0.1mm~0.8mm。第一通孔3的尺寸不能过大,以防止子弹直接从第一通孔3中通过;但也不宜过小,否则将达不到对冲击的减震吸能效果。本实施例中第一通孔3的端面边长尺寸优选为0.5mm。
具体而言,多列第一通孔3呈梯度排布,即多列第一通孔3从软质吸能层2的外侧到内侧呈由稀疏到致密再到稀疏的方式排列,实现软质吸能层2中部大变形,外部小变形,利于材料过渡,以防异质材料接触界面变形过大,出现脱层现象。相邻的两个第一通孔3的上下孔间距为0.5mm-1mm,间距过大,变形量小,吸能效果变差,间距过小,孔壁过薄,变形量过大,易发生层间脱层。本实施例中相邻的两个第一通孔3的上下孔间距优选为0.8mm。
复合层4以硬质材料为基体,沿基体环向开设多层交错的第二通孔5,第二通孔5内填充柔性材料。
优选的,第二通孔5呈前后两端面为正方形的长方体,且正方形的边长为2mm~4mm。本实施例中第二通孔5的端面边长尺寸优选为3mm。
优选的,多层第二通孔5沿复合层4的环向呈交错排布,使得第二通孔5内的柔性材料在复合层4的厚度方向上排布尽可能多,利于吸能减震,相邻的两个第二通孔5的上下孔间距为0.5mm-1.5mm。间距过大,使得柔性材料占比较少,吸能效果变差,间距过小,孔壁过薄,易发生断裂,影响防凹陷性能。本实施例中相邻的两个第二通孔5的上下孔间距优选为1mm。
具体地,复合层4中的硬质材料可选用硬质陶瓷、硬质合金中的一种,硬质陶瓷较硬质合金具有轻质高强的特点,故硬质材料选用硬质陶瓷。其中,碳化硼的各方面性能最好,故硬质材料选用碳化硼陶瓷。
复合层4中的柔性材料选用具有优异吸震性能的粘弹性材料,其中硅橡胶是一种优异吸震性能的粘弹性材料,因其玻璃化转变温度较低,在室温附近性能变化小,而硅氧键结构使其在较宽的温度区域内力学性能较为稳定,弹性模量变化小,性能较为稳定,适用于大应力、大应变而产生高热量的场合,故柔性材料选用硅橡胶。
内衬层6选用形状记忆聚合物纤维制得,形状记忆聚合物纤维(SMP)根据其恢复原理可分为:热致型、电致型、光致型、化学感应型等。根据头盔的工况,本实施例中选用热塑性形状记忆聚合物纤维。子弹击中头盔时,一部分冲击能转化为热能,使得弹着点周围温度迅速升高,达到形状记忆聚合物纤维转化温度时,将恢复为原始设定形状,在弹着点附近向外凸起,远离头皮,形成空腔,利于冲击能向头盔弹着点四周扩散,减轻对头部的冲击力。
硬质抗冲击层1、软质吸能层2、复合层4和内衬层6依次左右叠置,且硬质抗冲击层1、软质吸能层2、复合层4和内衬层6固定安装在一起。
具体而言,硬质抗冲击层1、软质吸能层2、复合层4和内衬层6相邻界面通过结构胶粘剂环氧-酚醛胶黏剂进行连接,采取刷涂的方法涂布胶黏剂,保证厚薄合适。
最后应说明的是:以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。
Claims (10)
1.一种小凹陷抗冲击仿生防弹头盔,其特征在于,包括自外层至内层依次叠置的硬质抗冲击层(1)、软质吸能层(2)、复合层(4)、内衬层(6);
所述硬质抗冲击层(1)、所述软质吸能层(2)、所述复合层(4)与所述内衬层(6)之间采用胶接的方式连接;
所述软质吸能层(2)内部沿环向设置多列第一通孔(3),多列第一通孔(3)呈梯度排布;
所述复合层(4)内部沿环向设置多列第二通孔(5),多列第二通孔(5)交错设置,且第二通孔(5)内填充柔性材料。
2.如权利要求1所述的小凹陷抗冲击仿生防弹头盔,其特征在于,所述硬质抗冲击层(1)采用硬质陶瓷、轻质合金中的一种制成。
3.如权利要求1所述的小凹陷抗冲击仿生防弹头盔,其特征在于,所述软质吸能层(2)采用海绵、橡胶、乳胶中的一种或多种制成。
4.如权利要求1所述的小凹陷抗冲击仿生防弹头盔,其特征在于,所述第一通孔(3)的横截面为平行四边形,且平行四边形的边长为0.1mm~0.8mm。
5.如权利要求1所述的小凹陷抗冲击仿生防弹头盔,其特征在于,相邻两个第一通孔(3)的上下孔间距为0.5mm~1mm。
6.如权利要求1所述的小凹陷抗冲击仿生防弹头盔,其特征在于,所述复合层(4)由硬质材料和柔性材料制成;所述硬质材料采用硬质陶瓷、硬质合金中的一种;所述柔性材料为粘弹性材料。
7.如权利要求6所述的小凹陷抗冲击仿生防弹头盔,其特征在于,所述粘弹性材料为硅橡胶。
8.如权利要求1所述的小凹陷抗冲击仿生防弹头盔,其特征在于,所述第二通孔(5)的横截面为正方形,且正方形的边长为2mm~4mm。
9.如权利要求1所述的小凹陷抗冲击仿生防弹头盔,其特征在于,相邻的两个第二通孔(5)的上下孔间距为0.5mm~1.5mm。
10.如权利要求1所述的小凹陷抗冲击仿生防弹头盔,其特征在于,所述内衬层(6)采用形状记忆聚合物纤维制成。
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