Simulation of Internal Stress in Injection Molded Parts

Hai Hong Wu; Zhen Feng Zhao; Chang Yu Shen

doi:10.4028/www.scientific.net/MSF.575-578.622

Paper Titles

Application Research on Expert System of Incremental In-Plane Bending
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Deformation Pattern of the Large Generator’s Retaining Rings during Hydraulic Bulging Strengthening
p.606

Density Functional Theory Applying in the Computation to the Properties of Copper Surface
p.612

Finite Element Simulation for Evolutions of Profiles during Hot Compression
p.616

Simulation of Internal Stress in Injection Molded Parts
p.622

A Study of the Microstructure and Grain Size at the Welding Heat Affected Zone of a Ferrite Stainless Steel
p.627

Study on Temperature Distribution of Plasma Surface Alloying Furnace
p.633

Reliability Calculation of Welded Pressure Pipe with Circumferential Crack Based on 3-D Elastic-Plastic SFEM
p.639

Numerical Simulation of Basal Parameters for Fatigue Evaluation of Electromotor Rotor Welded Structure
p.643

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Simulation of Internal Stress in Injection Molded Parts

Abstract:

The development of internal stress in injection molded parts is analyzed. Different from other researches, this study uses a new modified Maxwell model to calculate the internal stress. On the basis of the creep experiments of injection molded parts, a non-linear constitutive equation is proposed. Non-linear finite element equation to calculate the internal stress is derived. By means of this model, the internal stress of an injection molded polystyrene plate is simulated. The effects of mold wall temperature, cooling time and packing pressure on the development of internal stress are investigated. The predicting results are in good agreement with experimental data.