Civil Engineering Reference
In-Depth Information
Solution
Mc
I
Modulus of rupture
=
where
M
=
bending
moment at maximum load
the specimen height
of inertia of the specimen cross section
c
=
1/2 of
I
=
moment
2.67
2
Reaction at each support at
failure
=
=
1.335 kN
710
2
Bending moment at the center at
failure
=
1.335
*
¢
≤
=
473
-
9 N.m
3
1
0.05
21
0.05
2
10
-
7
m
4
I
=
=
5.21
*
12
473.9
*
0.025
Modulus of rupture
=
=
22.75 MPa
10
-
7
5.21
*
■
10.9.2
Compression Tests
The compression test parallel to the grain is performed on either
or specimens,
as shown in Figure 10.11. The load is applied at a rate equal to 0.003 mm/mm
50
*
50 *
200 mm
2
*
2
*
8 in.
25
*
25
*
100 mm
1
*
1
*
4 in.
1
2
1
2
FIGURE 10.11
Compression
parallel to grain test.
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