BASIC BIOMECHANICS
8th Edition
ISBN: 9781259913877
Author: Hall
Publisher: RENT MCG
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Chapter 4, Problem 2IP
Summary Introduction
To find: The compressive and shear force to produce a fracture.
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A human femur undergoes bending and axial loading as shown below. The femur can be modeled as an isotropic linear elastic material with a Young’s modulus of 20 GPa, an outer diameter of 2.5 cm, and an inner diameter of 1.5 cm
A) Plot the stress distribution at the cross-sectional plane defined by points A and B. Label the neutral axis and which side is in tension or compression. Do not provide stress magnitudes.
B) If point A experiences strain of magnitude 91 μm/m, determine the magnitude of force F. (Recall: for this case, stress and strain are linearly related by one material constant.)
C) Assume the force F and cross-sectional area are unchanged from (b), but the bone cross section is now a circle rather than an annulus. Determine the new strain experienced at point A.
What is the age in years of a bone in which the 14C/12C ratio is measured to be 1.25×10−13?
What is the difference between closed reduction andopen reduction? In what type of fracture would closed reduction most likely occur? In what type of fracture wouldopen reduction most likely occur?
Chapter 4 Solutions
BASIC BIOMECHANICS
Ch. 4 - Prob. 1IPCh. 4 - Prob. 2IPCh. 4 - Prob. 3IPCh. 4 - Prob. 4IPCh. 4 - Prob. 5IPCh. 4 - Prob. 6IPCh. 4 - What kinds of fractures are produced only by...Ch. 4 - Prob. 8IPCh. 4 - In Problem 8, how much total stress is present on...Ch. 4 - Why are men less prone than women to vertebral...
Ch. 4 - Hypothesize about the way or ways in which each of...Ch. 4 - Prob. 2APCh. 4 - Prob. 3APCh. 4 - Hypothesize as to the ability of bone to resist...Ch. 4 - How are the bones of birds and fish adapted for...Ch. 4 - Prob. 6APCh. 4 - Hypothesize as to why men are less prone to...Ch. 4 - Prob. 8APCh. 4 - How much compression is exerted on the radius at...Ch. 4 - If the anterior and posterior deltoids both insert...
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