The collapse behavior of axially compressed cone-cylinder transition with single load indentation (SLI) imperfection through experimental and numerical approaches is presented in this paper. A total of six (6) cone-cylinder transitions were manufactured from 0.5 mm steel plate. Four models were manufactured in pairs for perfect and imperfect cone-cylinder with indentation amplitude of 0.56 mm. While, the remaining two cone-cylinder specimens were manufactured with indentation amplitude of 1.12 mm and 1.68 mm, respectively. The experimental failure load was seen to be repeatable between each pair, with errors ranging from 3 % to −7%. Also, the predicted failure load by finite element (FE) reproduces the experimental load. The ratios of experimental collapse load to numerically predicted value ranges between −1% and 9 %. From the results, it is apparent that there is a significant influence of the cone-cylinder geometry, i.e., radius-to-thickness ratio and cone semi-vertex angle on the buckling behavior of axially compressed cone-cylinder transitions having the SLI imperfection. Finally, the knockdown factor (KDF) for axially compressed cone-cylinder with SLI imperfection was compared with the KDF suggested by NASA SP-8019 for cones and SP-8007 for cylinders. Results show that the predicted knockdown factor for both elastic and elastic-plastic cone-cylinder with SLI imperfection lies between NASA SP-8019 and SP-8007.

本文通过实验和数值方法介绍了具有单载荷压痕 (SLI) 缺陷的轴向压缩锥筒过渡的坍塌行为。总共六 (6) 个锥筒过渡件由 0.5 mm 钢板制成。四个模型成对制造，用于完美和不完美的锥形圆柱体，压痕幅度为 0.56 毫米。同时，其余两个锥筒试样的压痕幅度分别为 1.12 mm 和 1.68 mm。实验失败负载被认为在每对之间是可重复的，误差范围从 3% 到 -7%。此外，通过有限元 (FE) 预测的失效载荷再现了实验载荷。实验倒塌载荷与数值预测值的比率介于 -1% 和 9% 之间。从结果来看，显然，锥柱几何形状，即半径与厚度比和锥半顶角对具有 SLI 缺陷的轴向压缩锥柱过渡的屈曲行为有显着影响。最后，将具有 SLI 缺陷的轴向压缩锥形圆柱的击倒系数 (KDF) 与 NASA SP-8019 建议的圆锥和 SP-8007 建议的 KDF 进行比较。结果表明，具有 SLI 缺陷的弹性和弹塑性锥形圆柱的预测击倒因子介于 NASA SP-8019 和 SP-8007 之间。将具有 SLI 缺陷的轴向压缩锥形圆柱的击倒系数 (KDF) 与 NASA SP-8019 建议的圆锥和 SP-8007 建议的 KDF 进行比较。结果表明，具有 SLI 缺陷的弹性和弹塑性锥形圆柱的预测击倒因子介于 NASA SP-8019 和 SP-8007 之间。将具有 SLI 缺陷的轴向压缩锥形圆柱的击倒系数 (KDF) 与 NASA SP-8019 建议的圆锥和 SP-8007 建议的 KDF 进行比较。结果表明，具有 SLI 缺陷的弹性和弹塑性锥形圆柱的预测击倒因子介于 NASA SP-8019 和 SP-8007 之间。