期刊
ARCHIVE OF APPLIED MECHANICS
卷 85, 期 9-10, 页码 1459-1468出版社
SPRINGER
DOI: 10.1007/s00419-014-0945-8
关键词
Phase field model; Phase transformation; Continuum fracture model; Crack propagation; Finite elements
类别
A combined continuum phase field model for martensitic transformations and fracture is introduced. The positive volume change that accompanies the phase transformation from austenite to martensite leads to an eigenstrain within the martensitic phase, which is considered within the present approach. Since the eigenstrain leads to both tensile and compressive loads, the model accounts for the sign of the local volume change. With aid of this model, the interactions between microcrack propagation and the formation of the martensitic phase are studied in two dimensions. Martensite forms in agreement with experimental observations at the crack tip and thus influences the crack formation. The numerical implementation is performed with finite elements. For the transient terms, an implicit time integration scheme is employed.
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