BDA31003Task Report No.3

NADIA BALQIS BINTI ISMAILMatrix No: CD120171

December 16, 2014

1.0 Model/Problem Description

For this task, Student is requested to do investigation to find the best fiber orientation configuration of the composite structure with reinforced fiber by employing LISA. The specimen to investigate is similar with that of exercise 6 which is to find the best configuration for longitudinal loading and the best configuration for bending loading.

The configuration of the fiber orientation is listed in Table .1.0

CONFIGURATION NO.

Φ1 Φ2 Φ3

A 0 0 0B 90 90 90C 0 45 0D 45 0 45

TABLE 1.0 Fiber Orientation Configurations

2.0 Finite Element Model

2.1 Element ModelThe reinforced Fibre is modelled as three dimensional general static composite structure. The material consists of element 1 until 40 with a thickness 1.2 m. The x-y-z surface has 55 nodes with 40 elements. The illustration of the model is shown in Figure 1.The unit used in this model is a SI unit:Length: mE: N/m2, therefore the Young’s Modulus is 50000 N/m2 at x-axis and y-axis.Force: N, the applied force for this case is 1000 N at node 2, 3, 53, 54 and 55Figure 1 FEM model

Figure 2.0 FEM model

2.2 Constraints

The model of Composite structure of a building structure is shown in Figure 1.0 above. To represent a fixed end of this composite structure, nodes 1, 4, 5, 7, and 6 are constrained at all direction. They are not allowed to move at all direction by using displx, disply, displz, rotx, roty and rotz equal to zero. The constraints can be seen in Figure 1.

2.3 LoadingsA concentrated load is represented by indicating as a positive direction

in x-direction, using forcex= 10000 N at node 2, 3, 53, 54 and 55.

3.0 Results and Short Discussion

The displacement and von misses results are illustrated in Figure below., respectively for every configuration (A, B, C, D). By looking at the magnitude (total) displacement and the maximum von misses stress of the structure, it is clearly shown that every configuration will gives different maximum displacement and stresses. The largest displacement is at the tip where a concentrated load is applied. Meanwhile, a critical area occurs at the right upper and bottom corner.

Figure 3.0: Configuration A structure for Displacement of magnitude diagram.

Figure 3.1: Configuration B structure for Displacement of magnitude diagram.

Figure 3.2: Configuration C structure for Displacement of magnitude diagram.

Figure 3.3: Configuration D structure for Displacement of magnitude diagram.

Meanwhile the Stress result for each configuration are shown below

Figure 4.0: Configuration A structure for maximum stress of magnitude diagram.

Figure 4.1: Configuration B structure for maximum stress of magnitude diagram.

Figure 4.2: Configuration C structure for maximum stress of magnitude diagram.

Figure 4.3: Configuration D structure for maximum stress of magnitude diagram.

Type of Configuration Maximum Displacement Maximum Stress

A 0.09098 m 362.9 Pa

B 0.15770 m 371.5 Pa

C 0.07823 m 395.8 Pa

D 0.07598 m 430.0 Pa

Figure 5.0 The comparison between each configuration based on displacement and stress

From figure.5.0, we can compare that the best longitudinal loading is Configuration D structure because of the lowest displacement value result. Meanwhile for the best bending result among these configurations is Configuration A because of the lowest stress value compare to others configuration.

4.0 CONCLUSION

Based on this simulation result, there are some results can be derived which is the best configuration longitudinal loading is configuration D with 0.07598 m displacement, whereas best configuration bending loading is configuration A with 362.9 N/m2.