Using forming simulations to improve mechanical simulation accuracy

Myllykoski, P.

doi:10.1016/j.jmatprotec.2006.04.096

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…On the other hand, the two hot forming processes produce changes in the proportion of ferrite to pearlite in the samples, altering the properties of the samples, and thus leading to the nonlinear responses as observed in the two figures. These experimental results support those reported in the earlier work [6,[8][9] that the degree of pre-strain and manufacturing history do affect the subsequent material mechanical properties.…”

Section: Service Stage (Simulated By the Second And Fourth Uniaxial Tsupporting

confidence: 91%

“…One reason for this is that components made of UHSS in a vehicle body are most commonly manufactured using sheet metal forming process. In addition, it has been found by many researchers that when an ultra-high strength steel is deformed using a sheet metal forming process, it can produce significant changes in its material properties like yield strength [5] and homogeneity [6][7] , and thus in its service performance such as bending and impact resistance [8][9][10][11] , weldability and welding strength [12][13] , and fatigue behaviour [14][15] .…”

Section: Introduction mentioning

confidence: 99%

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Experimental investigation of the effect of the material damage induced in sheet metal forming process on the service performance of 22MnB5 steel

Zhuang

Xie

Chen

2016

Chin. J. Mech. Eng.

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The use of ultra-high strength steels through sheet metal forming process offers a practical solution to the lightweight design of vehicles. However, sheet metal forming process not only produces desirable changes in material properties but also causes material damage that may adversely influence the service performance of the material formed. Thus, an investigation is conducted to experimentally quantify such influence for a commonly used steel (the 22MnB5 steel) based on the hot and cold forming processes. For each process, a number of samples are used to conduct a uniaxial tensile test to simulate the forming process. After that, some of the samples are trimmed into a standard shape and then uniaxially extended until fracture to simulate the service stage. Finally, a microstructure test is conducted to analyze the microdefects of the remaining samples. Based on the results of the first two tests, the effect of material damage on the service performance of 22MnB5 steel is analyzed. It is found that the material damages of both the hot and cold forming processes cause reductions in the service performance, such as the failure strain, the ultimate stress, the capacity of energy absorption and the ratio of residual strain. The reductions are generally lower and non-linear in the former process but higher and linear in the latter process. Additionally, it is found from the microstructure analysis that the difference in the reductions of the service performance of 22MnB5 by the two forming processes is driven by the difference in the micro damage mechanisms of the two processes. The findings of this research provide a useful reference in terms of the selection of sheet metal forming processes and the determination of forming parameters for 22MnB5.

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Section: Service Stage (Simulated By the Second And Fourth Uniaxial Tsupporting

confidence: 91%