Materials Reports  2019, Vol. 33 Issue (z1): 436-439 |
| METALS AND METAL MATRIX COMPOSITES |
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| Influence of Inclusion Shape on the Stress and Strain Distribution at the Interface of Inclusion and Matrix |
| LIU Xinling1,2,3, TAO Chunhu1,2,3 , WANG Tianyu1,2,3
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1 AVIC Failure Analysis Center, Beijing Institute of Aeronautical Materials, Beijing 100095
2 Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation, Beijing 100095
3 Aviation Key Laboratory of Science and Technology on Materials Testing and Evaluation, Beijing 100095 |
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Abstract The shape of inclusion has obvious influence on the crack initiation of powder superalloy. The influence of inclusion shape on stress & strain distribution was researched for inclusions with the same size and same position by Function of Complex Variables of elastic theory. The results show that the variation of inclusion shapes has clearly effect on the stress & strain distribution. When inclusion shape is ellipse, the normal stress of inclusion-matrix interface, the angular θ, and the maximum plastic strain may increase with the increase of the elliptic half axis parallel to the loading direction, the elliptic half axis perpendicular to the loading direction decrease. When inclusion shape is not the ellipse but the polygon, there are stress singularities at the corner joint of polygon. At this time, stress intensity factor was used to represent the stress field of polygon corner joint.
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Published: 05 July 2019
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| About author:: Xinling Liu received her Ph.D. degree in materials science from the Beijing Institute of Aeronautical Materials in Sep. 2005—Jan. 2008. She has published more than 40 journal papers and three professional books as the first author. In addition, she acquired three provincial and ministerial awards. Her research interests focus on the failure analysis and prevention, safety and life prediction, fractography quantitative analysis, failure analysis expert system, and fracture characteristics and damage mechanism of advanced superalloys. |
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