Non-linear viscoelastic constitutive equation to calculate internal stress of injection molded articles

申长雨 吴海宏 赵振峰

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Non-linear viscoelastic constitutive equation to calculate internal stress of injection molded articles

更新时间：2025-12-10

- Non-linear viscoelastic constitutive equation to calculate internal stress of injection molded articles
- CIESC Journal Issue 2, (2007)
- 作者机构：
  
  河南工业大学机电工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 February 2007，
  
  Published：05 February 2007
- 稿件说明：
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申长雨吴海宏赵振峰. Non-linear viscoelastic constitutive equation to calculate internal stress of injection molded articles[J]. CIESC Journal, 2007, (2).
DOI：

申长雨吴海宏赵振峰. Non-linear viscoelastic constitutive equation to calculate internal stress of injection molded articles[J]. CIESC Journal, 2007, (2). DOI：

摘要

在聚合物黏弹性理论的基础上，构建了新的注塑制品内应力计算的四元件串联力学模型，并推导了其瞬态黏弹性响应的非线性本构方程，给出了聚合物材料参数弹性模量和黏壶系数的计算公式，并对PS平板注塑制件脱模前的内应力进行了模拟计算。计算结果与固体高聚物的结构和力学性能的相关研究结论相一致，所建计算模型合理可靠。

Abstract

Based on the viscoelastic theory of solidified polymer，a new four-element mechanical model in series was proposed and its non-linear constitutive equation was derived to calculate internal stress of injection molded articles.The equation illustrates

the instantaneous viscoelastic behavior of polymer and its effect on internal stress state of the product in the cooling processThe equations for calculating elastic modulus and viscosity of polymers were givenThe internal stress of an injection molded polystyrene plate was simulated by means of the new modelThe results are in good agreement with published researching conclusions about the structure and mechanical properties of polymers

which show that the model is accurate and feasible.

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