CM 140/240
Introduction to Biomechanics
Homework #1
Due Date : 1l16l2003 Thusday
1. A stamp collector views his prize exhibits
through a magnifying glass with his head, whose mass
is 5.5 kg, in the stance indicated in Fig. 1.74. The weight
of his head, W,

Consider the general curvilinear motion in space of a particle of mass m,
where the particle is located by its positionr vector
measured from a
fixed origin O.
v
The velocity of the particle is r is
tangent to its path. The resultant
Fforce
of all force

CM140/CM240 Introduction to
Biomechanics
Knee Joint
Extends anteromedially from the tibia posterior to the
intercondylar eminence and inserts into the medial femoral
condyle anteriorly within the intercondylar notch
Quadriceps
Quadriceps
Knee: Anterior V

CM140/CM240 Introduction to
Biomechanics
Knee Joint
Extends anteromedially from the tibia posterior to the
intercondylar eminence and inserts into the medial femoral
condyle anteriorly within the intercondylar notch
Quadriceps
Quadriceps
Knee: Anterior V

CM140/CM240 Introduction to
Biomechanics
Hip Joint
1) Resists hyperextension and excess lateral rotation of femur
Anterior-inferior iliac spine length of intertrochanteric line
2) Posterior surface of acetabulum inner aspect of greater trochanter
+ latera

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ML” ., F+AF+ BF : keu+ {A(£e+k.+an-B(7f7*éi)}”
A e + BCke+lq+hJU +(k.~-A;,I‘\'L+B—,’5§>Up
2 ’ ' l
m +ckl—A%+B%)ul\”§’o“/
I“ :0
I -
k 11 150.20 tel—Maire"; Re two cmkmow'n;
L _ ﬂ; 1!: _ 1mm
u=—u.+u.’*u1+uf ~@ A h+h ’5‘qu
I

CM140/CM240 Introduction to
Biomechanics
Hip Joint
1) Resists hyperextension and excess lateral rotation of femur
Anterior-inferior iliac spine length of intertrochanteric line
2) Posterior surface of acetabulum inner aspect of greater trochanter
+ latera

Introduction to Biomechanics
Module on
Stress Concentrations
Linear Elastic Fracture Mechanics
(LEFM)
UCLA MAE256F
Why Fracture Mechanics?
Theoretical Tensile Strength of a
Material = E/10
Actual Tensile Strength of a Material =
E/300
UCLA MAE256F
Why Fr

CM 140/240
Introduction to Biomechanics r» l 2}
xx.
Homework #4
Due Date : 2/12/2004 Thursday
Problem 1.
A driver in a stationery car (also called target car) waiting at a red light is rear—ended by
another vehicle (also called the bullet car). After impa

CM 140/240 Introduction to Biomechanics
HINTS
Problem 1
- Assume the center of gravity of the shank and foot are in the middle points of those lengths.
- Shank length ratio= 24.5%
- Shank and foot length ratio = 28.5%
- Shank weight ratio = 4.5%
- Foot we

Piston diameter a .121?1
Tube diameter - 212
Figure 2.
Alarming
.‘h.
Mildly annoying '
Acceleration, (g)
Frequency (Hz)
Figure 3. Human reaction to whole-body vibration.
CM 140/240
Introduction to Biomechanics
Homework #2
Due Date : 1l23l§003Thursday
1.

CM140/CM240 Introduction to
Biomechanics
Constitutive Relation For Soft Tissues
Knee: Posterior
and Sagittal
Views
Vertebral Column
Quasi-Linear Viscoelasticity of Soft Tissues
Exponential integral function
Behavior at t of the order of 1 sec
= Eulers con