CAJ | 학술논문

针对过去十年中管道韧性断裂的止裂预测与全尺寸试验结果不相符，致使标准预测工具对现代管道设计的适用性出现的问题。 SZMF公司开发出了新的止裂预测方法。基于能量的判断应考虑到材料韧性的止裂压力预测。在有限元模型的数值方法中，代表材料抗力的基于能量的内聚区模型包含了材料损失，材料的力学性能特征值根据预制疲劳裂纹试样的落锤撕裂试验（DWTT）来确定。
침대과거십년중관도인성단렬적지렬예측여전척촌시험결과불상부，치사표준예측공구대현대관도설계적괄용성출현적문제。 SZMF공사개발출료신적지렬예측방법。기우능량적판단응고필도재료인성적지렬압력예측。재유한원모형적수치방법중，대표재료항력적기우능량적내취구모형포함료재료손실，재료적역학성능특정치근거예제피로렬문시양적락추시렬시험（DWTT）래학정。
As predicted ductile fracture arrest in line pipes more and more failed to match with the outcome of full-scale tests within the last decade, the applicability of standard prediction tools to modern pipeline design is put into question. To overcome this shortcoming, research at SZMF is focused on deriving a novel approach to crack-arrest prediction. Two independent routes are being followed. An analytical, energy based criteria shall allow for arrest pressure predictions involving a material toughness value. In a numerical approach by FEM, material damage is covered by an energy based cohesive zone model representing material resistance. The characteristic mechanical material quantities are determined by DWT testing involving pre-fatigued specimens.