Achievements

1.基于力学、有限元方法、光学、数字图像处理等多学科交叉的研究，提出了高精度、高效金属材料力学性能测试新方法，解决了复杂结构和超薄壁先进高强钢大范围应力-应变本构关系测试难题，为金属材料韧性裂纹扩展预测提供了可靠途径。

 

(a) 基于实验-有限元数值迭代优化高效同步获取超薄壁先进高强钢大范围应力-应变本构关系和断裂应变-约束关系，准确预测韧性裂纹扩展路径

 

  • Shibanuma Kazuki, Shengwen Tu, Shota Suzuki, Zhuocheng Yu, Ryoma Kato, and Asato Hatamoto. "Ductile crack propagation path depending on material properties: Experimental results and discussions based on numerical simulations." Materials & Design 223 (2022): 111158.
  • Shengwen Tu, Shota Suzuki, Zhuocheng Yu, and Kazuki Shibanuma. "Hybrid experimental-numerical strategy for efficiently and accurately identifying post-necking hardening and ductility diagram parameters." International Journal of Mechanical Sciences 219 (2022): 107074.

 

 

 

(b) 基于轴对称缺口试样和非接触式数字图像处理方法，提出了材料大范围应力-应变本构关系测量方法，为环焊缝等复杂结构力学性能表征测试提供了新思路

 

  • Shengwen Tu, Xiaobo Ren, Jianying He, and Zhiliang Zhang. "A method for determining material's equivalent stress-strain curve with any axisymmetric notched tensile specimens without Bridgman correction." International Journal of Mechanical Sciences 135 (2018): 656-667.
  • Shengwen Tu, Xiaobo Ren, Jianying He, and Zhiliang Zhang. "Stress–strain curves of metallic materials and post-necking strain hardening characterization: A review." Fatigue & Fracture of Engineering Materials & Structures  43 (2019): 3-19.
  • Shengwen Tu, Xiaobo Ren, Jianying He, and Zhiliang Zhang. "Experimental measurement of temperature-dependent equivalent stress-strain curve of a 420 MPa structural steel with axisymmetric notched tensile specimens." Engineering Failure Analysis  100 (2019): 312-321.
  • Shengwen Tu, Xiaobo Ren, Bård Nyhus, Odd Magne Akselsen, Jianying He, and Zhiliang Zhang. "A special notched tensile specimen to determine the flow stress-strain curve of hardening materials without applying the Bridgman correction." Engineering Fracture Mechanics  179 (2017): 225-239.
  • Shengwen Tu, Xiaobo Ren, Tore Andre Kristensen, Jianying He, and Zhiliang Zhang. "Study of low temperature effect on the fracture locus of a 420 MPa structural steel with the edge tracing method."  Fatigue & Fracture of Engineering Materials & Structures  41 (2018): 1649-1661.

 

 

 

 

(c) 基于落锤撕裂试样能量-载荷曲线的裂纹尖端张角高效测试新方法，为高钢级管道韧性止裂控制和疲劳裂纹扩展参数测量提供了简明、可靠的途径

  • Jian Shuai, Shengwen Tu, Junqiang Wang, Xiaobo Ren, Jianying He, and Zhiliang Zhang. "Determining critical CTOA from energy-load curves with DWTT specimen." Engineering Fracture Mechanics 186 (2017): 47-58.
  • Di Yan, Jian Shuai, Junqiang Wang, Shengwen Tu. "A new specimen for high-grade pipeline steels CTOA test." Engineering Fracture Mechanics  148 (2015): 203-212. 

 

 

2.结合有限元模拟和实际管道工程失效事故，开展复杂载荷服役环境下管道失效分析和裂纹扩展行为研究，揭示了不连续屈服对韧性裂纹扩展阻力的影响；为大口径管道压缩应变容量预测提供了思路。

 

(a) 不连续屈服对含缺陷结构、部件裂纹扩展的影响研究，为极地服役环境金属材料选材和高钢级管道结构完整性评估提供了科学支持

  • Shengwen Tu, Xiaobo Ren, Jianying He, and Zhiliang Zhang. "Effect of the Lüders plateau on ductile fracture with MBL model." European Journal of Mechanics/Solids 78 (2019): 103840.
  • Shengwen Tu, Xiaobo Ren, Jianying He, Zhiliang Zhang. "Numerical study of the Lüders plateau effect on ductile crack growth with SENT specimens." International Journal of Fracture 214 (2018): 185-200. 
  • Shengwen Tu, Xiaobo Ren, Jianying He, Zhiliang Zhang. "On the study of the effect Lüders plateau on fracture response with cohesive zone model." Thin-walled structures  141 (2019): 62-72. 

 

 

 

(b) 复杂载荷条件下油气管道结构稳定性及压缩应变容量研究，为大口径油气管道稳定性设计和失效分析提供了技术支持

 

  • Shengwen Tu, Jian Shuai. "Numerical study on the buckling of pressurized pipe under eccentric axial compression." Thin-walled Structures 147 (2020): 106542.

 

Team Members

To be updatedenlightened。。。