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广泛的研究已经证明,断裂韧性是一种复杂的力学性能,它与许多基本力学性能,例如弹性性能(弹性模量)、塑性性能(屈服强度、应变硬化)、延性及显微组织有关。虽然往往可能把K_(1C)看作是这些性能之一的函数,但一般来说,K_(1C)是由这些性能综合起来确定的。 在本文所述的工作中,通过平面应变断裂韧性、拉伸性能、断口形貌和显微组织的测量和观察,研究了高强度低合金钢的裂纹特点,进而用获得的数据验证K_(1C)计算模
Extensive research has demonstrated that fracture toughness is a complex mechanical property associated with many fundamental mechanical properties such as elastic properties (modulus of elasticity), plastic properties (yield strength, strain hardening), ductility and microstructure. Although K_ (1C) may often be considered as a function of one of these properties, in general, K_ (1C) is a combination of these properties. In the work described in this paper, the crack characteristics of high strength and low alloy steels were studied by plane strain fracture toughness, tensile properties, fracture morphology and microstructure measurement and observation. Then the obtained data were used to verify the K_ (1C ) Calculation mode