Kinetic Force Analysis & Joint Stress Simulator

3D Kinetic Biomechanics & Force Attenuation Simulator

Developed By: Ir. MD Nursyazwi

An advanced computational environment designed to analyze ground reaction forces (GRF) and musculoskeletal load distribution during high-impact vertical deceleration events.

User Interface Guide

Instructions on How To Use

To utilize the Biomechanics Lab simulator, follow the systematic workflow below to evaluate landing kinetics:

• Adjust the Patient Mass slider to define the gravitational weight of the subject.
• Set the Fall Height to simulate the vertical displacement prior to impact.
• Select the Neuromuscular Damping level to represent the technical proficiency of the landing (Stiff vs. Compliant).
• Execute the Start Simulation command to visualize the kinematic sequence and force distribution.
• Interact with the 3D viewport by clicking and dragging to inspect joint angles from various anatomical planes.

Parameter Configuration

Data Input

Subject Mass (kg): 75

Vertical Drop Height (m): 0.6

Landing Mechanics (Damping) High Compliance (Soft Landing) Standard Athletic (Nominal) Stiff Landing (High Risk) Mechanical Impact (Pathological)

Kinematic Visualization

Graphical Simulation

SYSTEM IDLE

3D Render: Interactive Mesh showing anatomical stress points via dynamic heatmap.

Quantitative Metrics

Data Output

Peak GRF

0 N

Impact Velocity

0.0 m/s

Body Weight Mult.

1.0x

Time to Peak

0 ms

Clinical Observation

Awaiting kinetic analysis. Execute simulation to generate tissue stress report.

Kinetics Analysis

Graphs and Charts

The following Ground Reaction Force (GRF) curve represents the vertical component of the impact force relative to time. Sudden spikes in the curve indicate poor force attenuation and high risk for ligamentous failure.

Theoretical Framework

Science Explanations

The biomechanics of landing involves the conversion of gravitational potential energy into kinetic energy, which must be dissipated through the musculoskeletal system. According to the Impulse-Momentum Theorem, the force of impact is inversely proportional to the time over which the deceleration occurs.

When a subject lands with "stiff" mechanics (minimal knee and hip flexion), the impact duration is shortened, resulting in a high-magnitude peak Ground Reaction Force. This energy is often transferred to non-contractile tissues such as the Anterior Cruciate Ligament (ACL) and the intervertebral discs of the lumbar spine.

Current research suggests that peak loads exceeding 8 times the subject's body weight are significant predictors of bone stress and soft tissue trauma in athletic populations.

Academic Sources

References

1. Hewett, T. E., et al. (2005). Biomechanical measures of neuromuscular control and valgus loading of the knee predict ACL injury risk in female athletes. American Journal of Sports Medicine.

2. Nigg, B. M. (2010). Biomechanics of Sport Shoes. University of Calgary Press.

3. Yu, B., & Garrett, W. E. (2007). Mechanisms of non-contact ACL injuries. British Journal of Sports Medicine.

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