| Research on Thermoplastic Polyurethane Elastomer Waterproof Shell |
| Received:May 12, 2022 Revised:May 12, 2022 |
| DOI：10.12136/j.issn.1000-890X.2023.12.0925 |
| Key Words: TPU；multi-layer interference connection thin-walled cylinder；waterproof shell；contact stress |
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| Abstract: |
| Aiming at the problem that the existing rubber seals can not be disassembled and rapidly
prototyped，a waterproof shell model was designed using the existing 3D printing material thermoplastic
polyurethane elastomer （TPU） combined with a multi-layer interference joint thin-walled cylindrical
structure. The finite element axisymmetric model of the waterproof shell was established by the finite element
analysis software Abaqus，and the contact pressure and stress as well as the magnitude and distribution of
radial displacement were analyzed after the shell was assembled. The results showed that the contact stress of
the multi-layer interference joint thin-walled cylinder waterproof shell made of TPU was distributed on four
longitudinal contact surfaces，and the maximum contact stress reached 1. 767 MPa，which met the contact
stress requirements of IP×7 waterproofing. This study provided new ideas for the design of the elastic
element sealing structure. |
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