Injury Biomechanics

Simms Lab Research group at Trinity College Dublin

The injury biomechanics group at TCD generally aims to understand how external forces load internal body structures, to enable design of improved devices/processes in injury biomechanics applications. We work on four principal strands: soft tissue mechanics (especially the structure-loading relationship in passive muscle), pedestrian/cyclist collisions (protection remains a challenge), sports injuries (increasing importance and sporting collisions are a living laboratory), and device design.

Pedestrian safety

Investigating pedestrian injuries from a biomechanical perspective.

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Subway Human Collisions

Large international collaborative research project aimed at designing a countermeasure to reduce the lethality of pedestrian subway impacts.

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Cyclist safety

Investigating cyclist injuries from a biomechanical perspective.

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High-Speed Train Post-Derailment Collisions

Study of railway occupant crash injury in post-derailment collisions, including studying the train post-derailment collision responses, and occupant injury analysis using dummy sled tests and simulations

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Rugby Collisions

Sports injuries are very common in contact sports such as rugby. Sometimes it's hard to diagnose some injuries, such as concussions, in the field due to lack of immediate symptoms. We aim to use pose estimation combined with multibody simulation software (MADYMO) to study those injuries.

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Athlete Rehabilitation

Further developing pose estimation models to establish biomechanically meaningful data from footage of athletes rehab exercises to support physios making assessments.

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Soft tissue mechanics

Investigating the mechanical tension-compression asymmetry in skeletal muscle.

Buddy Roamer

Award-winning walking aid for children.

McElmeel Mobility

Crash resistant swivel seats.

Blk Box Designs

Gym equipment.

Wound closure

Device for improved surgical closure.

Prof Ciaran Simms


Daniel Hall

PhD Candidate

Kevin Gildea

PhD Candidate

Gongxun Deng

PhD Candidate

Richard Blythman

Technical Officer

Clara Mercadal Baudart

Biomechanics Research Assistant

Shi Shang

PhD Candidate

Gregory Tierney

PhD Candidate

Travis Davis

Research Fellow

Cyrus Doctor

Research Fellow

Introduction to OpenPose

OpenPose is a well established pose estimation. This tutorial will introduce you to to this technology, and help you better understand the basics, before you really dive into it.

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How Safe is Safe Enough

Some cars are often referred to as having a "5 star pedestrian safety rating". What does this mean. How safe is it really and how safe or unsafe does a car need to be to get a 1 star safety rating?

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Euler integration of kinematic differential equations for position and orientation

We can integrate kinematic differential equations to determine both 1) where an object will be and 2) what orientation it will have after a specified amount of time. In this post I describe the mathematical procedure, and implement the solution in Python.

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Computational modelling of a bouncing ball using differential equations of motion

Using differential equations of motion (EOMs) governed by Newton’s 2nd law we can describe the kinematics and dynamics of objects in motion. In this post I describe how EOMs can be calculated and applied programmatically for a simple case of a falling and bouncing ball with one translational degree of freedom.

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Non-uniqueness of the Euler axis in vector mapping

With a lack of complete basis vector representation for the two coordinate systems, there are an infinite number of rotation matrices, or axis-angle combinations that can be applied to achieve a desired vector mapping. However, here we define the constrained nature of the solution space.

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