论文标题
使用累积的熵评估疲劳裂纹开始
Evaluation of fatigue crack initiation using accumulated entropy
论文作者
论文摘要
累积的熵用于评估由不锈钢制成的扁平凹口标本中裂纹的启动。已经研究了两个Notch Radii，以捕获裂纹启动的热量和测量累积的热量耗散。已经观察到的是，在带有-1的R-Ratio的拉力载荷下，裂纹启动的累积熵和裂纹长度的生长至特定数字，骨折疲劳熵几乎保持恒定。已经考虑了无效变形耗散，并且已经讨论了基于开尔文 - voigt类型元素的数学模型。在测试开始时，已经根据温度演化研究了抗弹性变形的效果。
The accumulated entropy is used to evaluate the initiation of crack in flat notched specimen made of stainless steel 304. Two notch radii have been studied to capture the thermography of crack initiation and measure accumulated heat dissipation. It has been observed that under pull-push loading with an R-ratio of -1, the accumulated entropy for crack initiation and crack length's growth up to a specific number, Fracture Fatigue Entropy remains nearly constant. Anaclastic deformation dissipation has been taken into account and a mathematical model based on Kelvin-Voigt type element has been discussed. The effect of anelastic deformation has been studied in terms of temperature evolution at the beginning of the test.
