Table 3 Experimental results of composite tubes.

Exp. No	L (mm)	d (mm)	n	Mass, m (g)	Volume, V (mm³)	Area, A (mm²)	P_max (kN)	σ (MPa)	EA (J)	SEA (J/g)
1	70	8	2	70	32,530.40	464.72	39.99	86.05	32.39	0.462
2	70	8	4	64	31,953.59	464.72	36.90	79.59	49.44	0.772
3	70	8	6	57	31,245.88	464.72	44.64	96.05	87.61	1.554
4	70	10	2	68	32,338.77	464.72	41.44	89.17	35.84	0.527
5	70	10	4	60	31,507.85	464.72	32.77	70.51	84.87	1.414
6	70	10	6	51	30,688.43	464.72	30.44	65.60	88.58	1.737
7	70	12	2	63	31,784.55	464.72	30.91	66.50	54.86	0.870
8	70	12	4	57	31,245.88	464.72	27.85	59.91	87.11	1.527
9	70	12	6	49	30,741.41	464.72	35.12	75.57	46.35	0.946
10	140	8	2	140	65,060.80	464.72	19.37	41.68	29.05	0.208
11	140	8	4	136	64,781.99	464.72	30.94	66.57	50.43	0.371
12	140	8	6	129	63,974.02	464.72	26.91	57.90	47.09	0.365
13	140	10	2	139	64,978.77	464.72	36.49	57.00	36.62	0.263
14	140	10	4	134	64,496.08	464.72	39.39	84.76	46.67	0.348
15	140	10	6	128	63,824.02	464.72	24.93	53.64	62.32	0.595
16	140	12	2	142	65,310.77	464.72	39.43	84.84	69.08	0.456
17	140	12	4	131	64,131.84	464.72	20.77	44.69	77.88	0.487
18	140	12	6	122	63,201.92	464.72	25.20	54.22	33.26	0.273
19	210	8	2	245	97,569.23	464.72	26.34	56.67	40.69	0.166
20	210	8	4	230	96,963.21	464.72	22.63	48.69	42.62	0.176
21	210	8	6	220	96,456.24	464.72	25.76	55.43	45.08	0.204
22	210	10	2	235	97,001.32	464.72	31.45	67.67	31.60	0.134
23	210	10	4	217	96,124.87	464.72	34.66	74.58	41.07	0.189
24	210	10	6	203	92,215.32	464.72	31.53	67.84	31.68	0.156
25	210	12	2	227	96,654.24	464.72	29.75	64.01	33.17	0.146
26	210	12	4	209	92,888.54	464.72	28.99	62.38	34.64	0.165
27	210	12	6	193	91,025.36	464.72	26.21	56.39	27.78	0.143

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