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首页> 外文期刊>Engineering Fracture Mechanics >Fracture toughness testing using non-standard bend specimens - Part II: Experiments and evaluation of T-0 reference temperature for a low alloy structural steel
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Fracture toughness testing using non-standard bend specimens - Part II: Experiments and evaluation of T-0 reference temperature for a low alloy structural steel

机译：使用非标准弯曲标本的断裂韧性试验。第二部分：低合金结构钢的T-0参考温度的实验和评价

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摘要

The present study addresses an experimental investigation of the effects of geometry and loading mode on the cleavage fracture behavior of a high strength, low alloy structural steel using standard and non-standard SE(B) specimens, including a non-standard PCVN configuration. Fracture toughness testing conducted on various bend specimen geometries extracted from an A572 Grade 50 steel plate provides the cleavage fracture resistance data in terms of the J-integral at cleavage instability, J(c). The experimental results show a potential effect of specimen geometry and loading mode on J(c)-values which can help mitigating the effects of constraint loss often observed in smaller fracture specimens. An exploratory application to determine the reference temperature, T-0, derived from the Master Curve methodology (which defines the dependence of fracture toughness with temperature for the tested material) also provides additional support for using non-standard bend specimens in routine fracture applications.
机译：本研究解决了几何形状和装载模式对高强度，低合金结构钢的裂解断裂行为的实验研究，使用标准和非标准SE（B）样本，包括非标准PCVN配置。在A572级钢板中提取的各种弯曲标本几何形状上进行的断裂韧性试验在裂解不稳定性的J-Integration的j-Integral方面提供了裂解裂缝性数据。实验结果表明，样品几何形状和装载模式对J（c）的潜在效果，其可以帮助减轻在较小的骨折样本中经常观察到的约束损失的影响。确定从主曲线方法的参考温度，T-0的探索性应用（用测试材料的温度定义了骨折韧性的依赖性），还提供了在常规裂缝应用中使用非标准弯曲标本的额外支持。

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