J. Tritschler Department of Biomedical Industrial and Human Factors Engineering Wright State University 3640 Colonel Glenn Hwy. Dayton OH 45435 BME/ISE 3211 Human Biomechanics I Course Project Fall 2015

J. Tritschler Department of Biomedical Industrial and Human Factors Engineering
Wright State University 3640 Colonel Glenn Hwy. Dayton OH 45435
BME/ISE 3211 Human Biomechanics I Course Project Fall 2015

Due Date: 30 October 2015
Overview
This document outlines the BME/ISE 3211 Human Biomechanics I Course Project in which biostatics analysis
is used to design rehabilitation parameters for a patient with a torn distal biceps tendon. Each student will
construct a free-body diagram of the human elbow/tendon system perform static analysis of the system with an
external load placed in the hand calculate theoretical tendon tensions for a set of specified angles and loads
display data graphically and design rehabilitation parameters within constraints set by an injury specialist. A
formal report is to be submitted with all relevant info and conclusions.
Background
You are a consulting biomedical/industrial engineer assisting an employer in a prominent regional
manufacturing company. An employee has torn a distal biceps tendon and must undergo rehabilitation. An
injury specialist has performed tests and advises that the injured tendon should not be subjected to forces
exceeding 500 N during rehabilitation.
The employees job requires routine handling of parts ranging from 2-6 kg. During manipulation of these parts
the employee must extend the arm with supinated palm and hold the forearm in a horizontal position such that
the angle between the long axis of the upper arm and the forearm ranges from 30-70. Your task is to perform
biostatics analysis to determine if any of these loads causes tendon tension to exceed the value advised by the
injury specialist. From this analysis you will prepare a report for submission to the employer.
Theoretical System Parameters for Biostatics Analysis
Fig. 1 shows a pictorial diagram of the extended forearm holding a load in the supinated hand. Assume that the
axis of rotation of the elbow is fixed at point O and that the distance between O and the attachment point of the
distal biceps tendon is a = 5.7 cm. The mass of the entire forearm including hand is mb = 1.66 kg and its center
of gravity is located b = 21.0 cm from O. Define the load in the hand as mc; its center of gravity is located c =
40.6 cm from O. Define Fm as the biceps tendon tension. Assume that the line of action of Fm is parallel to the
long axis of the upper arm throughout the specified range of motion. Therefore define ? as the angle Fm makes
with the forearm; i.e. with respect to horizontal.
Fig. 1: Pictorial diagram of the extended forearm handling a variable mass.
2015 J. Tritschler Department of Biomedical Industrial and Human Factors Engineering
Wright State University 3640 Colonel Glenn Hwy. Dayton OH 45435
Report Guidelines and Grading Rubric
1) Prepare an electronically-generated free-body diagram of the system utilizing the parameters outlined

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