In Vitro Testing

For in vitro testing, we evaluated the structural integrity, materials, and performance characteristics of our crutch in solid works simulation environment.
Testing was done on the assembled crutch.

selecting material :

The material we selected was aluminum 6061-T6

Setting the properties of the material:

Young's Modulus (Elastic Modulus): 69 GPa
Poisson's Ratio: 0.33
Density: 2700 kg/m³
Yield Strength: 276 MPa
Ultimate Tensile Strength: 310 MPa

applying weight:

we set the maximum weight of our crutch to hold at 110kgs

setting fixed support: Under fixture we applied fixed geometry to the footpad to prevent movement and simulate ground contact.

Results after running simulation:
The stress results:

Stress analysis: The von Mises stress (7.866e5 N/m²) is far below the material's yield strength (2.75e8 N/m²), confirming the crutch is structurally safe and capable of withstanding the applied loads without yielding.

Displacement results:

Displacement Analysis: The maximum displacement (0.2097 mm) is minimal and within acceptable limits for user stability, showing the design's stiffness is sufficient.

strain results:

Strain Analysis: The maximum strain value (9.833e-6) is significantly below the material's expected strain limit, indicating the crutch can withstand the applied load without experiencing excessive deformation.

Conclusion
The foldable crutch was analyzed to demonstrate that the loaded structure is structurally sound and safe under the given load conditions. The maximum strain value (9.833e −6), is about two orders of magnitude less than the material allowable strain limit, so damage is expected to be very minimal. The maximum displacement is also negligible (0.2097 mm), indicating the required stiffness for user stability. This von Mises stress (7.866e5 N/m²) is far below the material’s yield strength (2.75e8 N/m²), so this crutch can withstand the applied loads without yielding. Taken together, the design appears to be reliable, durable, and appropriate for its intended purpose.