【摘要】：為分析不同組分低碳合金鋼板抗超高強度低碳合金鋼彈體的高速撞擊性能及破壞模式,以兩種典型防彈特種鋼SS、AS以及常見的Q235A鋼為研究對象,通過靜態(tài)拉伸、靜態(tài)壓縮及動態(tài)壓縮測試,獲得靜態(tài)拉伸和壓縮性能參數(shù)以及1 000~6 000s~(-1)應變率范圍內的力學行為,分析了材料組分與力學性能的相關性。采用彈道槍加載撞擊方法,獲得了兩種超高強度合金鋼平頭圓柱形彈體對3種鋼板(14.5~15.9mm厚)的彈道極限速度,通過分析獲得了不同工況下的極限比吸收能,討論了合金鋼板在彈體高速撞擊下破壞模式的差異,分析了材料力學性能與破壞模式的相關性。研究表明:3種合金鋼板抗彈體撞擊性能與材料屈服強度正相關,但其性能間的差異遠小于屈服強度間的差異;在超高強度合金鋼平頭圓柱形彈體的高速撞擊下,3種鋼板的失效機制與其力學性能密切相關,Si和Mn含量高的AS鋼呈硬脆性特征,其斷裂失效主要取決于材料的剪切強度,而Si和Mn含量較低的SS鋼和Q235A鋼具有良好的塑性,其斷裂失效主要取決于材料的壓縮強度和剪切強度。
[Abstract]:In order to analyze the high speed impact resistance and failure mode of different components low carbon alloy steel plate, two typical bulletproof special steel SS,AS and Q235A steel were studied by static tensile. Static and dynamic compression tests were performed to obtain the static tensile and compression properties and the mechanical behavior in the strain rate range of 1000 ~ (-1) s ~ (-1). The correlation between the composition and the mechanical properties of the materials was analyzed. The ballistic limit velocities of two kinds of ultra-high strength alloy steel flat-head cylindrical projectiles to three kinds of steel plates (14.5~15.9mm thickness) are obtained by means of ballistic gun loading and impingement, and the limit specific absorption energies under different working conditions are obtained by analyzing the ballistic limit velocities of three kinds of steel plates (14.5~15.9mm thickness). The difference of failure mode of alloy steel plate under high velocity impact is discussed, and the correlation between mechanical properties of materials and failure mode is analyzed. The results show that the impact resistance of three kinds of alloy steel plates is positively related to the yield strength of the material, but the difference between the three kinds of alloy steel plates is much smaller than the difference of the yield strength. The failure mechanism of three kinds of steel plates is closely related to their mechanical properties under the high velocity impact of the cylindrical projectile with flat head of ultra-high strength alloy steel. The AS steel with high Si and Mn content shows the characteristics of hard brittleness, and its fracture failure mainly depends on the shear strength of the material. However, SS steel and Q235A steel with lower Si and Mn content have good plasticity, and their fracture failure mainly depends on the compressive strength and shear strength of the material.
【作者單位】： 北京理工大學爆炸科學與技術國家重點實驗室;
【基金】：國家自然科學基金項目(11402027)
【分類號】：TG142.15

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