Q4-In the below picture, the subject has a spine space implant at cross section A-A and is lifting a box with weight of 100N. The subject's weight (600N) is also acting at the center of mass shown in the picture. a) Determine the internal loadings (only shear force & normal force, don't need to calculate any bending moment) at cross section AA on the spine at the below posture. b) Determine the shear stress due to shear force in the spine space implant with the diameter of 4 cm. c) If the implant is made of a biocompatible material with failure shear stress of 1Mpa, determine the factor of safety (F.S.)

Q4-In the below picture, the subject has a spine space implant at cross section A-A and is lifting a box with weight of 100N. The subject's weight (600N) is also acting at the center of mass shown in the picture. a) Determine the internal loadings (only shear force & normal force, don't need to calculate any bending moment) at cross section AA on the spine at the below posture. b) Determine the shear stress due to shear force in the spine space implant with the diameter of 4 cm. c) If the implant is made of a biocompatible material with failure shear stress of 1Mpa, determine the factor of safety (F.S.)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

System of Forces

A force is an external influence or agent that changes the state of a system. According to Newton's second law, the force applied to a body is proportional to the change in momentum of a body. Hence, whenever a force is applied to a body, its momentum changes. If the body is at rest, under the action of force, its state of rest changes to motion. In other words, the magnitude of the momentum of the body changes from zero to a measurable value. Similarly, if the body possesses some initial velocity, it has some associated momentum, the effect of force can cause the body to halt or come to rest, that is, the momentum reduces to zero.

Question

2 of 2
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Q4-In the below picture, the subject has a spine space implant at cross section A-A and is lifting
a box with weight of 100N. The subject's weight (600N) is also acting at the center of mass
shown in the picture.
a) Determine the internal loadings (only shear force & normal force, don't need to calculate
any bending moment) at cross section AA on the spine at the below posture.
b) Determine the shear stress due to shear force in the spine space implant with the diameter
of 4 cm.
c) If the implant is made of a biocompatible material with failure shear stress of 1Mpa,
determine the factor of safety (F.S.)
10cm
600N
10cm
-----30°
600N
40cm
.30
100N
40cm
1.30
100N
(Results: V = 350N, N = 606.22N,t = 0.278 MPa, F.S = 3.597)
MAR
tv
25

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