Why Viscoelasticity?

Plastic materials have both viscous and elastic properties. It is difficult to accurately describe the property variations during the molding process when using classical fluid mechanics or classical elastic mechanics. To realize the effects of these material properties on product quality or structure, designers need a professional simulation tool to predict the filling patterns using different plastic materials upfront. Moldex3D Viscoelasticity helps users to visualize polymer variations over time in the cavity; furthermore, it can be integrated with Warp or Optics modules to provide advanced analyses.

What Can Moldex3D Do?

  • Calculate viscous and elastic properties of plastic materials
  • Predict flow-induced residual stress and visualize molecular variation distribution
  • Predict the stress behavior during solidification and relaxation processes
  • Predict maximum normal stress and shear stress in each point of the final product
  • Combine residual stress analysis to predict optical properties (with Optics module)
  • Residual Stress Prediction

Residual stress is highly related to the viscoelasticity properties of polymers. It can be classified as thermal-induced and flow-induced residual stress. It will highly influence the product strength and may cause fatigue breakdown.

Von Mises Stress prediction

Von Mises Stress prediction


  • Warp Analysis

During the cooling process, temperature changes over time at each position of a part. The temperature distribution has a significant impact on the warpage result. Considering the viscoelasticity properties of plastic materials, the Warp analysis result will become more close to the real plastic melt flow behavior.

Deformation Result in the Warp Analysis

Deformation Result in the Warp Analysis


  • Annealing Analysis
    Annealing is a heating process of an injection molded plastic part below its glass transition temperature. This process has been mainly applied in industries to reduce the inherent stress which may cause deformation or cracking failure. Stress reduction can provide an extra measure of safety from aggressive chemical environments which may come in contact with the part. Moldex3D Viscoelasticity helps users to simulate the hot oven annealing process and visualize temperature variation and stress distribution.

Temperature variation in the Annealing simulation

Temperature variation in the Annealing simulation

Applicable Industries

  • Electronics
  • Optical
  • Automotive
  • Medical
  • Consumer Product

Applicable Moldex3D Package

  • Moldex3D eDesign Package
  • Moldex3D Professional Package
  • Moldex3D Advanced Package



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