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# Lecture 8 - PowerPoint PPT Presentation

Lecture 8. Continuation of last time Stress Tensor- applied to blood forces Test. Mechanical Models. Voigt solution. Y. X. Z. 3-Dimensional stresses (stress tensor). Stress components @ Equilibrium. y. x. z. Blood Forces on ECs. Y.C. Fung. y. x. z.

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## PowerPoint Slideshow about ' Lecture 8' - mandelina-jorgensen

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• Continuation of last time

• Stress Tensor- applied to blood forces

• Test

X

Z

3-Dimensional stresses (stress tensor)

x

z

Blood Forces on ECs

Y.C. Fung

x

z

Analysis of EC upper membrane

Symmetrical

(Fluid Mosaic)

x

z

On surface facing

blood

On surface facing

cytosol

x

z

Static Eq

x

z

On surface facing

blood

Define

We need membrane tension as f(t)

x

z

(if Tx= 0 @ x=0)

For t = 1 N/m2 , L= 10 mm, h = 10 nm

Stress on cell from flow

@ x = -L

0 L

For L= 1 cm, sxx= 106

Hence P1=P2=P3=P4=P5 =P

Integral pulse frequency modulation

Probability Pulse frequency and width Modulation

Inputs

Leaky integrator

Thresholder

Pulses

out

Reset

X2

+

1/s

X1

-

1

3