Study of Pre-strain Effect on Bendability in Three-Point Bending Test
2021
The bendability of sheet metals can be estimated by the three-point bending test. Several factors and parameters such as pre-strain, can affect the bendability of sheet metals. This effect is investigated using the Gurson–Tvergaard–Needleman model through finite element method. Bending strain at the initiation of a fracture is calculated to assess bendability. Pre-strain is observed to reduce maximum force in the bending test and cause early fracturing.
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