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Title: An evolving effective stress approach to anisotropic distortional hardening

Journal Article · · International Journal of Solids and Structures
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A new yield surface with an evolving effective stress definition is proposed for consistently and efficiently describing anisotropic distortional hardening. Specifically, a new internal state variable is introduced to capture the thermodynamic evolution between different effective stress definitions. The corresponding yield surface and evolution equations of the internal variables are derived from thermodynamic considerations enabling satisfaction of the second law. A closest point projection return mapping algorithm for the proposed model is formulated and implemented for use in finite element analyses. Finally, select constitutive and larger scale boundary value problems are solved to explore the capabilities of the model and examine the impact of distortional hardening on constitutive and structural responses. Importantly, these simulations demonstrate the tractability of the proposed formulation in investigating large-scale problems of interest.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003525; AC04-94AL85000
OSTI ID:
1633360
Alternate ID(s):
OSTI ID: 1431215; OSTI ID: 1582877
Report Number(s):
SAND-2018-2639J; S002076831830115X; PII: S002076831830115X
Journal Information:
International Journal of Solids and Structures, Journal Name: International Journal of Solids and Structures Vol. 143 Journal Issue: C; ISSN 0020-7683
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Figures / Tables (16)

Table 1(p. 14)table Table 1
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Table 2(p. 15)table Table 2
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Table 3(p. 27)table Table 3
Figure 10(p. 28)figure Figure 10
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Figure 12(p. 31)figure Figure 12
Table 4(p. 32)table Table 4

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42 ENGINEERING
Anisotropic hardening
Distortional hardening
Yield surface
Return mapping algorithm
Plasticity