Biomedical Engineering Reference
In-Depth Information
(d) Give the amplitude of the force for the case
ε
0
=
0.01 and a frequency
f
=
5[Hz].
5.2
A material can be characterized with a standard linear model (see figure
below). The material is loaded with a step in the force at time
t
=
0. At
time
t
=
t
1
the material is suddenly unloaded stepwise.
c
2
F
η
c
1
ε
(a) Derive the strain response for this loading history.
(b) Make a drawing of the strain response as a function of time.
(c) Calculate
d
ε/
dt
for
t
=
0.
5.3
In a dynamic experiment a specimen is loaded with a strain as given in the
figure below. The strain is defined by:
ε
=
0.01 sin(
ω
t
),
0.1 [rad s
−
1
].
ω
=
with
0.01
0.005
tan
(
δ
)
0
-0.005
-0.01
0 020
30
40
50
60
70
80
90
100
time [s]
2
1
0
-1
-2
0
10
20
30
40
50
60
70
80
90
100
time [s]
