TY - JOUR
T1 - An efficient load identification for viscoplastic materials by an inverse meshfree analysis
AU - Kazemi, Z.
AU - Hematiyan, M. R.
AU - Shiah, Y. C.
N1 - Funding Information:
The corresponding author gratefully acknowledges the financial support from the Ministry of Science and Technology, Taiwan (No. 106-2221-E-006-129 ).
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/2
Y1 - 2018/2
N2 - Despite the extensive study of direct viscoplastic analysis in the past, its inverse study has remained very scarce indeed. In this paper, an inverse method based on an improved version of the meshfree radial point interpolation method (RPIM) is presented for load identification in 2D viscoplasticity. The unknown load, varying with respect to space and time, is determined using measured strains at several sampling points on boundary or within the domain of the problem. The inverse analysis employs the well-known Tikhonov regularization and damped Gauss–Newton methods. Proper location and arrangement of sampling points for more accurate identification of unknowns is investigated too. To demonstrate the feasibility of the proposed method, a comprehensive numerical example in different conditions is presented. Furthermore, the effects of some important parameters, such as the number of sampling points and measurement errors, on the stability and accuracy of the solution are also studied.
AB - Despite the extensive study of direct viscoplastic analysis in the past, its inverse study has remained very scarce indeed. In this paper, an inverse method based on an improved version of the meshfree radial point interpolation method (RPIM) is presented for load identification in 2D viscoplasticity. The unknown load, varying with respect to space and time, is determined using measured strains at several sampling points on boundary or within the domain of the problem. The inverse analysis employs the well-known Tikhonov regularization and damped Gauss–Newton methods. Proper location and arrangement of sampling points for more accurate identification of unknowns is investigated too. To demonstrate the feasibility of the proposed method, a comprehensive numerical example in different conditions is presented. Furthermore, the effects of some important parameters, such as the number of sampling points and measurement errors, on the stability and accuracy of the solution are also studied.
UR - http://www.scopus.com/inward/record.url?scp=85044865427&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85044865427&partnerID=8YFLogxK
U2 - 10.1016/j.ijmecsci.2017.12.050
DO - 10.1016/j.ijmecsci.2017.12.050
M3 - Article
AN - SCOPUS:85044865427
VL - 136
SP - 303
EP - 312
JO - International Journal of Mechanical Sciences
JF - International Journal of Mechanical Sciences
SN - 0020-7403
ER -