基于动态撕裂能的ESSO止裂试验冲击能量预测模型研究%Study on Prediction Model of Impact Energy for ESSO Crack Arrest Test Based on Dynamic Tear Energy
中国船舶集团有限公司 中国机械总院集团郑州机械研究所有限公司 中铁大桥勘测设计院集团有限公司 沪东中华造船（集团）有限公司 湖南华菱湘潭钢铁有限公司 河南省科学院材料研究所
2026-03-17
船用高强钢 ESSO试验 动态撕裂能 冲击能量 预测模型 止裂性能
为解决船用高强钢厚板ESSO止裂试验中冲击能量规定不合理导致的结果离散度大、精度低问题,本研究结合梯度温度型ESSO试验机理与动态撕裂试验特性,建立了基于动态撕裂能的ESSO冲击能量下限值预测模型.通过分析关键影响因素,明确了试样厚度和缺口尖端曲率半径是影响两者相关性的核心因素.基于试验数据拟合与理论推导,得到了ESSO冲击能量与动态撕裂能的相关性方程.多个批次船用高强钢厚板的验证试验结果表明,依据该模型确定的冲击能量下限值开展ESSO试验,所测止裂韧度与双重拉伸试验结果误差小,有效降低了试验结果离散程度,提高了测量精度,为厚度≥16mm的船用高强度厚板止裂性能的准确评估提供了有力技术支撑.%To address the issues of large result dispersion and low accuracy in the ESSO crack arrest test for thick marine high-strength steel plates caused by unreasonable specification of impact energy,this study establishes a prediction model for the lower limit of ESSO impact energy based on dynamic tear energy by combining the mechanism of the gradient temperature ESSO test and the characteristics of the dynamic tear test.Through the analysis of key influencing factors,it is clarified that the specimen thickness and the radius of curvature at the notch tip are the core factors affecting the correlation between the two.Based on experimental data fitting and theoretical derivation,the correlation equation between ESSO impact energy and dynamic tear energy is obtained.Verification tests on multiple batches of marine high-strength steel thick plates show that when the ESSO test is carried out using the lower limit of impact energy determined by this model,the error between the measured crack arrest toughness Kca and the double tensile test results is small,which effectively reduces the dispersion of test results,improves the measurement accuracy,and provides strong technical support for the accurate evaluation of the crack arrest performance of marine high-strength steel thick plates with a thickness of≥16 mm.
