Design Analysis and Optimization of Coil Spring for Three-Wheeler Vehicles Using Composite Materials

Table 11

Maximum shear stress comparison of steel with modified composite coil springs.

Load (N)	Maximum shear stress (modified spring) (MPa)
			Modified
	Steel spring		Carbon/epoxy spring		Carbon/CNT/epoxy spring
	FEA	Analytical	FEA	Analytical	FEA	Analytical
360	40.872	39.17916	15.451	11.501	14.456	11.501
720	81.7465	78.35832	30.903	23.001	28.913	23.001
1080	122.62	117.53748	46.354	34.502	43.369	34.502
1440	163.49	156.71664	61.806	46.003	57.825	46.005
1810	205.5	196.98411	77.686	57.823	72.683	57.823
2160	245.23	235.07496	92.708	69.004	86.738	69.004
2520	286.11	274.25412	108.16	80.505	101.19	80.505
2880	326.98	313.43328	123.61	92.006	115.65	92.006
3240	367.85	352.61244	139.06	103.50	130.11	103.51
3600	408.72	391.79160	154.51	115.00	144.56	115.01