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本文用环状表面裂纹圆柱试样,在纯扭转下,测定了裂纹扩展速率 da/dN;其次探讨了Ⅲ型裂纹扩展速率与应力强度因子幅度ΔK_Ⅲ之间的关系,及其与撕开位移幅度Δδ_Ⅲ之间关系。
In this paper, the crack growth rate da / dN is measured under pure torsion by using circular surface cracked cylindrical specimens. Secondly, the relationship between the crack growth rate Ⅲ and the amplitude ΔK_Ⅲ of stress intensity factor is discussed, Δδ_ Ⅲ the relationship between.