BDA 40303 Finite Element Method

1. FEM Laboratory Task 1In this task students should demonstrate their comprehension in doing analysis ofaxial problem in complex problem, including initial constraint set in point F. Whileapplying the load at C, at the same time point F is displaced 1 cm and maintained.The illustration of Task 1 is depicted in Figure 2.10.

Figure 2.10: Lab Task-1

2. FEM Laboratory Task 2Students are requested to do further investigation of the space frame structurein exercise 4 using more elements. At least every structure member shown Figure 3.16there must be at least 2 elements. Students are also requested to give comments aboutthe results compared with that from exercise 4.

3. FEM Laboratory Task 3Students are requested to do investigation to find the best fiber orientation configurationof the composite structure with reinforced fiber by employing LISA. The specimento investigate is similar with that of exercise 6.

1. Find the best configuration for longitudinal loading2. Find the best configuration for bending loading

The configuration of the fiber orientation is listed in Table .4.1

4. FEM Laboratory Task 4A bridge structure and the loading condition is illustrated in Figure 5.7. All elementshave E = 200GPa and the cross section area A = 10 × 10−4 m2. The mass densityof the material is 8000 kg/m2. As a design engineer you are requested to provide aninformation in regard the vibration characteristics of the preliminary design of thebridge.

1. Provide the first 5 natural frequencies and the corresponding mode shapes2. Since your report is a printed paper, the mode shapes are not only plotted butalso described technically so the reader understand the mode of the vibrationswithout looking at the animation3. If your client is not satisfied with the first natural frequency and wants to havehigher natural frequency of the first mode, what will be your recommendation.Your recommendation must be convincing and based on the data that you have.

5. FEM Laboratory Task 5

As a research engineer in a company you are requested to investigate two types ofaluminum fins as illustrated in Figure 6.7 that will be implemented to remove heatfrom a surface whose temperature is 150 _C. The temperature of surrounding air is25 _C. The natural heat transfer coefficient associated with the surrounding air is30W/m2 _C. The thermal conductivity of aluminum is 168W/m_C. Determine which oneof the fin that you would suggest. Your report should be concise, attractive and veryconvincing.