Comparison of the Fatigue Crack Propagation Behavior of Two Different Forms of PMMA Using Two-Stage Zone Model |
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| Authors: | Wenfeng Hao Liting Ma Xinwen Chen Yanan Yuan Yinji Ma |
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| Affiliation: | 1.Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation,Beijing Institute of Aeronautical Materials,Beijing,China;2.Applied Mechanics Lab, Department of Engineering Mechanics,Tsinghua University,Beijing,China |
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| Abstract: | The fatigue crack propagation behavior of two different forms of PMMA was studied using two-stage zone model. First, the fatigue crack length and fatigue crack propagation velocities of different specimens were obtained experimentally. Then the effect of material forms and specimen types on the fatigue crack propagation velocities was analyzed. Finally, the data scatter of da/dN-ΔK curves in different forms and different types of specimens was analyzed. The results show that the expressions of fatigue crack propagation velocities of middle crack tension (MT) specimens and compact tension (CT) specimens in the same form PMMA are similar. And the scatter of MT specimens is larger than CT specimens in two forms of PMMA. |
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