Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5018579 | Mechanics Research Communications | 2017 | 6 Pages |
Abstract
The mechanical behaviour of metallic materials subjected to plastic deformation is altered with the superposition of ultrasonic vibrations. A significant effect is the reduction of flow stress or acoustic softening. This phenomenon is utilized in metal forming and other deformation based manufacturing processes. Experimental investigations on ultrasonic assisted tensile tests focus on the effect of ultrasonic vibrations along the longitudinal axis of the specimen, whereas the manufacturing processes employs in transverse directions. In the present work, transverse ultrasonic vibrations are imposed during a uniaxial tensile test using an aluminium alloy. The trend of acoustic softening due to transverse direction vibrations is similar to that along longitudinal direction. A dislocation density based constitutive model is extended to model the softening due to ultrasonic effect. The predicted results agree well with the experimental observations.
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Authors
Abhishek Prabhakar, Girish Chandra Verma, Krishnasamy Hariharan, Pulak Mohan Pandey, Myoung Gyu Lee, Satyam Suwas,