Effects of Size, Section Pattern, and Material on the Tensile Performance of Filled Thin-Walled Tubes

Table 4

Comparative analysis of data obtained for different material specimens.

Materials	Groups	Yield force (kN)	AVG and STD	INC (%)	Ultimate force (kN)	AVG and STD	INC (%)	Fracture elongation (%)	AVG and STD	INC (%)	Fracture energy (J)	AVG and STD	INC (%)
304	Hollow	67.34	68.280.55	—	121.02	124.592.28	—	49.65	49.810.17	—	8557.60	8862.76227.1	—
		68.47			127.14			49.85			9082.47
		68.57			124.38			49.65			8728.89
		68.73			125.80			50.08			9082.07
	PTFE-filled	74.03	75.661.59	+10.81	141.55	143.711.61	+15.35	58.87	59.440.35	+19.33	12961.11	13062.04475.72	+47.38
		74.18			143.88			59.69			13699.62
		77.68			143.34			59.45			12378.65
		76.74			146.06			59.74			13208.76
16Mn	Hollow	104.02	104.911.24	—	146.53	144.242.31	—	27.29	26.440.57	—	5883.14	5697.76142.95	—
		105.48			143.88			26.62			5736.80
		106.65			145.92			25.96			5687.19
		103.49			140.62			25.89			5483.90
	PTFE-filled	108.65	110.831.34	+5.64	149.93	153.282.31	+6.27	30.62	29.800.68	+12.71	6808.23	6847.0959.67	+20.17
		111.62			153.64			29.34			6775.53
		110.89			153.11			30.29			6929.81
		112.15			156.43			28.95			6874.80
Q235	Hollow	196.24	193.753.33	—	243.80	240.292.58	—	15.77	17.361.29	—	7807.25	7529.79220.98	—
		197.78			241.62			16.41			7204.79
		189.83			237.24			18.75			7629.67
		191.17			238.48			18.49			7477.46
	PTFE-filled	194.19	205.288.64	+5.95	248.87	260.818.26	+8.54	18.40	17.800.55	+2.53	8680.23	8268.68260.21	+9.81
		204.93			262.17			16.99			8302.27
		203.61			260.09			17.65			8021.01
		218.41			272.12			18.17			8071.20
#45	Hollow	159.02	160.381.39	—	171.51	172.521.18	—	6.60	7.450.52	—	2089.32	2272.46160.62	m
		161.84			174.07			8.02			2528.53
		158.95			171.25			7.59			2209.32
		161.69			173.28			7.58			2262.65
	PTFE-filled	167.67	165.861.66	+3.42	181.31	180.451.43	+4.60	2.32	3.390.90	−54.50	1500.30	1806.83224.38	−20.49
		167.37			182.29			4.16			1977.45
		164.09			178.68			2.69			1688.95
		164.32			179.52			4.39			2060.62
42CrMo	Hollow	294.21	292.622.44	—	329.43	326.254.91	—	5.00	5.310.75	—	3947.23	4112.86303.26	—
		293.52			331.84			5.61			4345.82
		288.43			318.99			4.30			3702.44
		294.33			324.75			6.32			4455.97
	PTFE-filled	303.90	296.214.79	+1.22	341.78	332.497.30	+1.91	6.38	3.971.48	−25.24	5160.63	4144.77677.14	+0.78
		295.59			331.85			2.84			3653.53
		290.77			321.49			2.70			3400.20
		294.59			334.86			3.97			4244.72
6061	Hollow	52.54	52.801.41	—	61.35	61.671.67	—	12.12	14.001.13	—	1193.91	1389.29128.62	—
		52.16			61.09			14.36			1417.09
		55.14			64.40			15.14			1554.26
		51.37			59.85			14.36			1391.91
	PTFE-filled	52.47	54.522.56	+3.26	61.27	63.202.33	+2.48	4.98	4.920.19	−64.86	777.52	766.5614.89	−44.82
		51.95			61.00			5.19			784.89
		55.24			63.74			4.77			752.73
		58.39			66.80			4.73			751.09

AVG: average; STD: standard deviation; INC: increment.