NAME : KAIKONDAR S
COLLEGE : FRANCIS XAVIER ENGINEERING COLLEGE
1. Abstract
This study focuses on the structural analysis of a tablet stand designed using ABS plastic. The objective is to ensure stability, material efficiency, and ergonomic performance while withstanding applied forces. Finite Element Analysis (FEA) was used to evaluate stress distribution, displacement, and reaction forces. Observations show that the design sustains the expected loads while maintaining structural integrity. The key takeaway is that iterative optimization using simulation tools helps in achieving a balance between durability and lightweight design.
2. Methodology
Force Calculations
A static force of 3.92 N was applied based on typical user interactions and weight of a standard tablet (~0.5 kg). The reaction forces and stress distribution were computed using FEA.
Load Calculation:
Weight of tablet: 0.5 kg
Gravitational force: F = mg = (0.5 kg) * (9.81 m/s^2) = 4.905 N
Considering ergonomic interactions, a horizontal force component of 1.5 N was estimated.
Mathematical Approach:
Von Mises stress criterion was applied to evaluate yielding conditions.
Maximum Principal Stress and Minimum Principal Stress were analyzed for crack initiation risks.
Displacement was examined under varying loads to assess stability.
CAD & FEA Simulation
A parametric CAD model was developed using iterative refinements.
Mesh properties:
8609 nodes, 4300 elements
Element type: TE10 (Tetrahedral)
Aspect ratio: 1.905, ensuring good mesh quality.
The model was subjected to static load cases, and stress distributions were visualized.
3. Observations
Key Findings:
Von Mises Stress: Maximum value of 1.81e+5 N/m², staying within safe limits.
Maximum Principal Stress: 2.00e+5 N/m² indicating potential stress concentration zones.
Minimum Principal Stress: -2.61e+5 N/m², highlighting tension zones.
Displacement Magnitude: 0.11 mm, ensuring minimal deformation.
Reaction Force: Maximum observed 3.92 N, confirming force balance.
Graphs, simulation screenshots, and comparative stress tables will be included to visualize these results.
4. Novelty
Optimized Ergonomic Design: Improved stand inclination to enhance usability.
Material Efficiency: Achieved through iterative thickness variation while maintaining strength.
Enhanced Stability: Reinforced base structure reduced peak stress regions.
Minimal Displacement: Less than 0.11 mm, making the stand stable under expected loads.
5. Conclusions
The final design demonstrates optimal performance in structural integrity and weight balance. The best design minimizes material usage while keeping stress levels within permissible limits. Justification:
High factor of safety in stress analysis.
Low displacement ensures reliability.
Maintains a lightweight yet strong structure.
