Structural analysis of the supporting frame of a power tiller
MIDIAN SIHITE. F01400034. Structural Analysis on the Supporting Frame of a
Power Tiller. Under advisory: Setyo Pertiwi and Wawan Hermawan. 2005.
SUMMARY
The existing steel f i m e of a power tiller was analyzed in view of stress and
deformation. Consecutively, the material substitution with alumhum was
considered and compared to comply with strength requirement and environment
concerns. The numerical simulation through Finite Element (FE) analysis was
conducted under static load condition and then the numerical results were verified by
carrying out the experimental test.
The numerical results on the steel model showed that maximum deflection was
about 84 fi m occurred on vertical direction, and of the three component stresses the
longitudinal stress was highest at about 16 MPa. Meanwhile, both the deflection
and the component stress reached its minhwn values on lateral direction. The
stress and deformation requirement were complied by the shape of the frame which
provide longitudinal support and prevent losing flexural stiffhess under bending
loads. Furthermore, the maximurn von Mises stress was found about 14.5 MPa.
Compared to its allowable stress, the actual stress occurred on the steel model was
only 11%. The percentage was insignificant which means only small parts of the
steel model have function as load-carrying material. Therefore, the use of steel as
material of the frame was ineffective.
The differences between the numerical and experiment results were about
7-41 %. The significant error was found on point GI where the amount of strain
underestimated the numerical strain. Mechanical disturbance possibly damaged the
gauge during installation. Regardless of the smin of point GI,the differences were
only about 7- 33 %. These percentages were lower than the previous research.
Thus, it can be expected the numerical simulation produces the reasonable results.
The advantageous characteristics of aluminum are high stifkess to weight ratio,
good corrosion resistance, and recyclable. The advantages make it the best
candidate to substitute heavier material (steel and iron). The material performances
of duminum have been confirmed by their material indexes (MI
and Mz) that show
higher by about 1.5 times than the previous material steel. The numerical results on
the aluminum model indicated that the maximum deflection was about 3.2 times
higher than the steel model. The longitudinal, vertical and lateral stress increased
Power Tiller. Under advisory: Setyo Pertiwi and Wawan Hermawan. 2005.
SUMMARY
The existing steel f i m e of a power tiller was analyzed in view of stress and
deformation. Consecutively, the material substitution with alumhum was
considered and compared to comply with strength requirement and environment
concerns. The numerical simulation through Finite Element (FE) analysis was
conducted under static load condition and then the numerical results were verified by
carrying out the experimental test.
The numerical results on the steel model showed that maximum deflection was
about 84 fi m occurred on vertical direction, and of the three component stresses the
longitudinal stress was highest at about 16 MPa. Meanwhile, both the deflection
and the component stress reached its minhwn values on lateral direction. The
stress and deformation requirement were complied by the shape of the frame which
provide longitudinal support and prevent losing flexural stiffhess under bending
loads. Furthermore, the maximurn von Mises stress was found about 14.5 MPa.
Compared to its allowable stress, the actual stress occurred on the steel model was
only 11%. The percentage was insignificant which means only small parts of the
steel model have function as load-carrying material. Therefore, the use of steel as
material of the frame was ineffective.
The differences between the numerical and experiment results were about
7-41 %. The significant error was found on point GI where the amount of strain
underestimated the numerical strain. Mechanical disturbance possibly damaged the
gauge during installation. Regardless of the smin of point GI,the differences were
only about 7- 33 %. These percentages were lower than the previous research.
Thus, it can be expected the numerical simulation produces the reasonable results.
The advantageous characteristics of aluminum are high stifkess to weight ratio,
good corrosion resistance, and recyclable. The advantages make it the best
candidate to substitute heavier material (steel and iron). The material performances
of duminum have been confirmed by their material indexes (MI
and Mz) that show
higher by about 1.5 times than the previous material steel. The numerical results on
the aluminum model indicated that the maximum deflection was about 3.2 times
higher than the steel model. The longitudinal, vertical and lateral stress increased