ASTM E1221-12a
测定Kla铁素体钢的平面应变, 断裂抑制, 破裂韧性的标准试验方法

Standard Test Method for Determining Plane-Strain Crack-Arrest Fracture Toughness, KIa, of Ferritic Steels

被代替

ASTM E1221-12a 发布历史

ASTM E1221-12a由美国材料与试验协会 US-ASTM 发布于 2012。

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ASTM E1221-12a 发布之时，引用了标准

• ASTM E1304 金属材料平面应变（V形切口）断裂韧性的标准试验方法
• ASTM E1823 关于疲劳和断裂测试的标准术语
• ASTM E208 进行下落重力试验测定铁素体钢尼尔延展性过渡温度的标准试验方法
• ASTM E23 植物（绿色）屋顶系统的负荷分析最大介质密度的标准测试方法
• ASTM E399 金属材料平面应变断裂韧性的标准试验方法
• ASTM E616 ASTM E616-89
• ASTM E8 金属材料拉伸试验的标准试验方法(米制)

ASTM E1221-12a的历代版本如下：

• 2018年 ASTM E1221-12a(2018) 测定铁素体钢平面应变止裂断裂韧性的标准试验方法
• 2012年 ASTM E1221-12a 测定Kla铁素体钢的平面应变, 断裂抑制, 破裂韧性的标准试验方法
• 2018年 ASTM E1221-12A(2018)e1 测定铁素体钢平面应变止裂断裂韧性的标准试验方法
• 2012年 ASTM E1221-12 测定KIa铁素体钢的平面应变, 断裂抑制, 破裂韧性的标准试验方法
• 2010年 ASTM E1221-10 测定铁素体钢的平面应变裂纹止裂断裂韧度K_Ia 的标准试验方法
• 2006年 ASTM E1221-06 测定K<指数Ia>铁素体钢平面应变、断裂抑制、破裂韧性的标准试验方法
• 1996年 ASTM E1221-96(2002) 测定Kla铁素体钢的平面应变,断裂抑制,破裂韧性的试验方法
• 1996年 ASTM E1221-96 测定Kla铁素体钢的平面应变,断裂抑制,破裂韧性的试验方法

5.1 In structures containing gradients in either toughness or stress, a crack may initiate in a region of either low toughness or high stress, or both, and arrest in another region of either higher toughness or lower stress, or both. The value of the stress intensity factor during the short time interval in which a fast-running crack arrests is a measure of the ability of the material to arrest such a crack. Values of the stress intensity factor of this kind, which are determined using dynamic methods of analysis, provide a value for the crack-arrest fracture toughness which will be termed KA in this discussion. Static methods of analysis, which are much less complex, can often be used to determine K at a short time (1 to 2 ms) after crack arrest. The estimate of the crack-arrest fracture toughness obtained in this fashion is termed K a. When macroscopic dynamic effects are relatively small, the difference between KA and Ka is also small (1-4). For cracks propagating under conditions of crack-front plane-strain, in situations where the dynamic effects are also known to be small, KIa determinations using laboratory-sized specimens have been used successfully to estimate whether, and at what point, a crack will arrest in a structure (5, 6). Depending upon component design, loading compliance, and the crack jump length, a dynamic analysis of a fast-running crack propagation event may be necessary in order to predict whether crack arrest will occur and the arrest position. In such cases, values of K Ia determined by this test method can be used to identify those values of K below which the crack speed is zero. More details on the use of dynamic analyses can be found in Ref (4).

5.2 This test method can serve at least the following additional purposes:

5.2.1 In materials research and development, to establish in quantitative terms significant to service performance, the effects of metallurgical variables (such as composition or heat treatment) or fabrication operations (such as welding or forming) on the abi......

标准号

ASTM E1221-12a

发布

2012年

发布单位

美国材料与试验协会

替代标准

ASTM E1221-12a(2018)

当前最新

ASTM E1221-12a(2018)

 

 

引用标准

ASTM E1304 ASTM E1823 ASTM E208 ASTM E23 ASTM E399 ASTM E616 ASTM E8

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