Finite Element Simulation Analysis and Experimental Study of Arc Additive Frame Structure

doi:10.12382/bgxb.2024.0629

Abstract

Abstract:

The deformation and stress of typical additively manufactured frame components are simulated by using transient heat source algorithm,thermal cycle curve algorithm,full thermal cycle algorithm and intrinsic strain algorithm,and the prediction accuracies and calculation efficiencies of the different algorithms are analyzed.The results show that the maximum deformation position predicted by the transient heat source algorithm is the top four corners of the frame,and the stress is mainly distributed in the corners and top areas of the frame,which is in good agreement with the experimental results,and the prediction accuracies of feature point deformation and stress are 96.59% and 95.01%,respectively,and the calculation time is 326h;The prediction accuracy of the thermal cycle curve algorithm is comparable to that of the transient heat source algorithm,but the calculation time is shortened to 117h,and the predicted deformation contour and stress curve are in good agreement with the experimental results.Compared with the first two algorithms,the prediction accuracies of the full thermal cycle and intrinsic strain algorithms for feature point deformation are 85.68% and 65.86%,respectively,and the predicted deformation contour is quite different from the experimental results.The reliabilityies of the full thermal cycle and intrinsic strain algorithms are low,but their calculation times are shortened to 4h and 2h,respectively,and their efficiencies are significantly improved.

Key words: wire arc additive manufacturing, numerical simulation, deformation, stress

CLC Number:

TG456.7

LI Qingsong, WANG Lei, ZHAO Ning, ZHANG Xiaotian, ZHANG Lei, WANG Kehong. Finite Element Simulation Analysis and Experimental Study of Arc Additive Frame Structure[J]. Acta Armamentarii, 2025, 46(7): 240629-.

Figures/Tables 19

References 22

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名称	Ni	Cr	C	Mn	Si	P	Fe
焊丝		18.8	0.019	1.93	0.581	0.024	Bal.
基板	8.11	18.18	0.05	0.74	0.36	0.021	Bal.

名称	Ni	Cr	C	Mn	Si	P	Fe
焊丝		18.8	0.019	1.93	0.581	0.024	Bal.
基板	8.11	18.18	0.05	0.74	0.36	0.021	Bal.

温度/ ℃	屈服强度/ MPa	热膨胀系数/ 10^-5℃^-1	杨氏模量/ GPa	泊松比
20	254	1.45	194	0.29
100	245	1.56	185
200	187	1.66	171
300	174	1.74	168
400	166	1.78	162
600	158	1.87	90
800	109	1.92	66
1000	57	1.97	43
1200	25	2.01	20
1500	10	2.16	10

温度/ ℃	屈服强度/ MPa	热膨胀系数/ 10^-5℃^-1	杨氏模量/ GPa	泊松比
20	254	1.45	194	0.29
100	245	1.56	185
200	187	1.66	171
300	174	1.74	168
400	166	1.78	162
600	158	1.87	90
800	109	1.92	66
1000	57	1.97	43
1200	25	2.01	20
1500	10	2.16	10

温度/ ℃	比热容/ (J·kg^-1·K^-1)	热导率 (W·m^-1·K^-1)	密度/ (g·cm^-3)	弹性模量/GPa	线膨胀系数/ 10^-6K^-1
25	450	7.77	16.71	208.46	13.61
400	610	7.64	21.42	180.92	14.26
800	670	7.48	26.40	138.00	16.35
1000	670	7.40	28.94	113.25	17.07
1200	700	7.31	31.36	0.80	17.77
1400	1490	7.19	33.49	44.68	19.64
1450	9260	7.01	30.79	0	25.30
1500	810	6.69	31.48	0	25.78