2018 Volume 18 Issue 2 Pages 130-140
Evaluation of the back pressure on a lateral wall of square cross section snow compression pressure vessel during snow compression was performed using a 12 multipoint pressure sensor. First, results of experiments and FEM analyses were used to evaluate elastic deformation of snow compression pressure vessel under water proof test condition to confirm the FEM integrity as a digital manufacture design tool. Results confirmed that the elastic deformation FEM analysis is sufficient to predict high-pressure vessel deformation during service. The strain rate ἐ was 4.00 × 10-3 s-1 － 1.70 × 10-2 s-1. Compression tests were conducted to evaluate back pressure distributions for obtaining important data to support safe usage of the pressure vessel. Results show that the back pressure occurs only around the bottom of the pressure vessel during compression. The maximum back pressure was pb = 3.6 MPa at axial formation pressure pz = 3.0 MPa. Furthermore, the maximum pressure reached almost 120% of the axial formation pressure.
