Back Posture Support

Back Posture Support

Quality criteria

We conducted a series of tests and analyses on SolidWorks to evaluate the back support device, leveraging the specified material properties to ensure accurate simulations.

1. Flexibility and Comfort
  Objective: To assess the device’s ability to conform to a user's back and flex without breaking.
  Process: We performed a Flexibility Simulation in SolidWorks to observe how the device bends under load.
  Parameters:

  •    Elastic Modulus: Set to 2000 N/mm² (MPa) to simulate the material’s resistance to deformation under stress.
  •    Deformation Check: Displacement results were evaluated to ensure the device remained flexible enough for ergonomic support without compromising its structure.


2. Durability
  Objective: To verify that the device can withstand repeated loads without excessive wear or permanent deformation.
  Process: We conducted a Static Analysis simulating compressive and shear forces typical in exercise usage.
  Parameters:

  •   Yield Strength: 15 N/mm² (MPa), used to ensure that stress values remained below the threshold, thus preventing plastic deformation.
  • Tensile Strength: 30 N/mm² (MPa), validated against maximum stress points to confirm durability during prolonged use.


3. Weight Distribution and Stress Concentration
  Objective: To confirm that the device distributes load evenly, minimizing stress concentrations that could lead to premature wear or user discomfort.
  Process: A Stress Distribution Analysis was carried out to locate high-stress regions.
  Parameters:

  •    Mass Density: 1200 kg/m³, ensuring the simulation accurately reflected the weight distribution of the device material.
  •    Factor of Safety (FOS): We verified that the FOS remained above 1.5 in critical regions, indicating the design's suitability for real-world application.


4. Material Properties and Thermal Behavior
  Objective: To ensure that the material properties align with usage requirements under variable conditions.
  Process: We validated the following material properties for accurate modeling:

  •   Poisson's Ratio: 0.45, reflecting material compressibility and elastic deformation characteristics.
  •   Thermal Expansion Coefficient: 0 1/K, indicating minimal thermal expansion, making the material stable under temperature changes.
  •    Thermal Conductivity: 0.0002 W/(m·K), allowing minimal heat transfer, which supports comfort during extended use.


These simulations confirm that the back support device, made from the specified custom plastic material, meets the required criteria for flexibility, durability, weight distribution, and thermal stability. This comprehensive analysis assures that the design will perform effectively in ergonomic support applications.

A PDF document containing the Finite Element Analysis is attached:

Finite Element Analysis