Interactive Buckling of Q420 Welded Circular Tubes under Axial Compression

Table 3

Comparison of FEA results and experimental results.

Specimen label	D (mm)	T (mm)	L0 (mm)	L (mm)	Yield strength mean fy,ave (MPa)	Ntest (kN)	NFEM (kN)	NFEM/Ntest
D420-20-1	274	6.01	1890	2362	438	2095	2126	1.015
D420-20-2	275	6.01	1889	2361	438	2173	2134	0.982
D420-20-3	274	5.87	1890	2362	449	2178	2134	0.98
D420-30-1	273	5.85	2833	3305	450	2075	2039	0.983
D420-30-2	273	5.95	2835	3307	457	2094	2122	1.013
D420-30-3	273	5.91	2834	3306	451	2042	1974	0.967
D420-40-1	275	5.89	3776	4248	445	2027	1877	0.926
D420-40-2	276	5.83	3777	4249	464	2100	1898	0.904
D420-40-3	271	5.91	3776	4248	450	2026	1910	0.943
D420-50-1	274	5.87	4721	5193	449	2038	1840	0.903
D420-50-2	273	5.88	4721	5192	477	1997	1798	0.942
D420-50-3	273	5.88	4721	5193	477	2012	1797	0.925
D420-60-1	273	5.85	5662	6134	450	1957	1519	0.957
D420-60-2	273	5.95	5664	6136	457	1974	1559	0.968
D420-60-3	272	5.91	5665	6137	451	1960	1518	0.954
Average								0.957
Standard deviation								3.34%