航空学报 > 2018, Vol. 39 Issue (2): 221483-221483   doi: 10.7527/S1000-6893.2017.21483

低速冲击下金属蜂窝夹芯板抗侵彻性能的试验研究

陈尚军1, 秦庆华1, 张威1, 夏元明1, 于学会1, 张建勋1, 王彬文2, 王铁军1   

  1. 1. 西安交通大学 航天航空学院, 机械结构强度与振动国家重点实验室, 西安 710049;
    2. 航空工业飞机强度研究所, 西安 710065
  • 收稿日期:2017-06-05 修回日期:2017-11-03 出版日期:2018-02-15 发布日期:2018-02-11
  • 通讯作者: 秦庆华,E-mail:154552879@qq.com E-mail:qhqin@mail.xjtu.edu.cn
  • 基金资助:
    国家自然科学基金委员会创新研究群体科学基金(11321062);国家自然科学基金(11372235,11102146,11272246);中央高校基本科研业务费专项资金

Experimental investigation on against penetration of metallic honeycomb sandwich plates under low-velocity impact

CHEN Shangjun1, QIN Qinghua1, ZHANG Wei1, XIA Yuanming1, YU Xuehui1, ZHANG Jianxun1, WANG Binwen2, WANG Tiejun1   

  1. 1. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an 710049, China;
    2. Aircraft Strength Research Institute, AVIC, Xi'an 710065, China
  • Received:2017-06-05 Revised:2017-11-03 Online:2018-02-15 Published:2018-02-11
  • Supported by:
    Science Fund for Creative Research Groups of the National Nature Science Foundation of China (11321062); National Natural Science Foundation of China (11372235,11102146,11272246); The Fundamental Research Funds for the Central Universities

摘要: 利用落锤冲击试验系统,研究了金属蜂窝夹芯板在低速冲击载荷作用下的抗侵彻行为。试验获得了平头、半球形和锥形锤头冲击下蜂窝夹芯板的破坏模式和力-位移曲线,分析了锤头形状和芯材厚度对夹芯板最终破坏模式、力-位移曲线和临界破坏能量的影响。试验结果表明:夹芯板在平头、半球形和锥形锤头冲击下上面板分别产生了圆形剪切、圆形拉伸和钻石形的最终失效模式,下面板的最终失效模式分别为圆形剪切、瓣形开裂和瓣形开裂;金属蜂窝夹芯薄板在锥形锤头和半球形锤头冲击下的力-位移曲线会出现单峰模式,金属蜂窝夹芯厚板在锥形锤头和半球形锤头冲击下的力-位移曲线则是双峰模式,而在平头锤头冲击下的金属蜂窝夹芯板的力-位移曲线均为双峰模式;金属蜂窝夹芯薄板抵抗半球形锤头侵彻的能力最好,抵抗平头锤头侵彻的能力最差,而金属蜂窝夹芯厚板抵抗锥形锤头侵彻的能力最好,抵抗平头锤头和半球形锤头侵彻的能力较差。

关键词: 金属蜂窝, 夹芯板, 抗侵彻, 低速冲击, 破坏模式

Abstract: The against penetration behavior of metallic honeycomb sandwich plates under low-velocity impact was experimentally studied with the drop-hammer impact systems. Damage modes and impact force-displacement responses of sandwich plates with different core thickness under the impact of blunt, spherical and cone projectiles were demonstrated. The effects of core thickness and projectile's shapes on the final fracture modes, impact force-displacement responses and critical fracture energy of sandwich plates were analyzed. Experimental results show that round-shear fracture mode, round-tensile fracture mode and diamondoid fracture mode were found on the top face-sheets of sandwich plates when the shapes of the projectiles are blunt, spherical and conical, respectively. Round-shear fracture mode, petaloid fracture mode and petaloid fracture mode were found on the bottom face-sheets of sandwich plates when the shapes of the projectiles are blunt, spherical and conical, respectively. Single peak modes were found in the impact force-displacement responses during loading of the spherical and conical projectiles on thin sandwich plates, while double peaks modes occurred when the sandwich plates were thick. For both thin and thick sandwich plates under the impact of the blunt projectile, the impact force-displacement responses accorded with double peaks modes. The ability against penetration of the thin sandwich plate appeared to be the best under the impact of spherical projectiles, while the worst under the impact of blunt projectiles. The ability against penetration of thick sandwich plates appeared to be the best under the impact of conical projectiles, while poorer under the impact of blunt and spherical projectiles.

Key words: metallic honeycomb, sandwich plate, against penetration, low-velocity impact, damage mode

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