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Indexed by:期刊论文

Date of Publication:2022-06-30

Journal:化工学报

Affiliation of Author(s):机械工程学院

Issue:7

Page Number:3040-3046

ISSN No.:0438-1157

Abstract:Recently, engineering polymer material is applied widely in aerospace and automotive fields. Engineering plastic products manufactured by injection molding have to endure mechanical, thermal and other complicated service conditions when they work. Under the complicated load conditions, the magnitude of service stress in engineering plastic parts is associated with the structure safety of the engineering devices, especially with people’s lives. Taking warpage and residual stress of a hemisphere polycarbonate product as the initial conditions of the mechanical analysis, this paper proposes an efficient service stress optimization strategy with respect to the process parameters and the structure of the product and cooling channel, which integrals injection molding analysis and mechanical analysis. The maximum service stress is finally reduced by using an optimization strategy based on Kriging surrogate model and EI method. The results indicate that the thickness of the product, melt temperature and packing pressure are critical factors to influence the service stress.

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