Zuo Xiubin, Guo Chengjie, Chen Weidong, Wang Yixiao, Zhao Jian, Lv Huanlin
School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China.
State Key Laboratory of Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 116023, China.
Polymers (Basel). 2022 Sep 15;14(18):3859. doi: 10.3390/polym14183859.
Owing to deformation in the form of the diamond mode with high-energy absorption capacity, origami thin-walled tubes have attracted considerable attention in recent years. Stamping and welding are mainly employed to produce different types of origami thin-walled tubes. The processing defects and geometric asymmetry may be caused by the manufacturing process, which changes the collapsed mode and decreases the energy-absorbing capacity. In this study, fused filament fabrication (FFF) 3D printing is used to fabricate the origami-ending tube (OET) by integrated formation. Experiments and numerical simulations were conducted to study the influence of loading rate and temperature on the energy absorption of polymeric origami tubes under quasi-static loading. The experiments showed that different constitutive models are needed to capture the complex true stress-strain behavior of 3D printing polylactic acid (PLA) material at different temperatures. The damage model is established and then applied to the numerical simulations, which could predict the collapsed mode and the damage behavior of the OET tubes under different loading rates at 30 °C, 40 °C, and 50 °C. Based on the experiments and the validated numerical model, the influence of loading rate and temperature on the crashworthiness performance of the OET tubes is analyzed.
由于具有高能量吸收能力的菱形模式变形，折纸薄壁管近年来受到了相当大的关注。冲压和焊接主要用于生产不同类型的折纸薄壁管。制造过程可能会导致加工缺陷和几何不对称，这会改变坍塌模式并降低能量吸收能力。在本研究中，采用熔融长丝制造（FFF）3D打印通过集成成型来制造折纸末端管（OET）。进行了实验和数值模拟，以研究加载速率和温度对准静态加载下聚合物折纸管能量吸收的影响。实验表明，需要不同的本构模型来捕捉3D打印聚乳酸（PLA）材料在不同温度下复杂的真实应力-应变行为。建立了损伤模型并将其应用于数值模拟，该模型可以预测OET管在30°C、40°C和50°C不同加载速率下的坍塌模式和损伤行为。基于实验和经过验证的数值模型，分析了加载速率和温度对OET管耐撞性性能的影响。
