Contact Stress of Drop Impact to Corrugated Board and Damage Predication for Korla Pear
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Abstract:
In order to predict damage area of Korla pear after drop impact accurately, the contact stress characteristics for Korla pear impacts against corrugated board at varied drop heights were measured using pressure-sensitive film. Meanwhile, the relationship between the area occupied by the pressure and damage area was investigated and the range of stress area that closed to the damage area was determined. Furthermore, the finite element analysis (FEA) was used to predicate the damage area for Korla pear impact. The film measurements showed that the stress area more than 0.20 MPa was well approximate to the damage area, and the relative error rate was around 6.81%. When the above-mentioned contact stress range was applied to pear model of FEA for estimation of damage area, the predict value was slightly higher than actual one and the relative error rate was around 13.29%. Therefore, the results can provide data for damage predication of Korla pear packaged in corrugated board and ,the design of packing tools thereby reducing the damage occurring.
