Computationally-efficient modeling of inelastic single crystal responses via anisotropic yield surfaces: Applications to shape memory alloys

Hartl, Darren J.; Kiefer, Björn; Schulte, Robin; Menzel, Andreas

doi:10.1016/j.ijsolstr.2017.12.002

Cited by 11 publications

(4 citation statements)

References 71 publications

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“…Specifically, J 2 based models cannot capture tensioncompression asymmetry; J 2 − I 1 based models can capture tension-compression asymmetry or pressure dependence, and J 2 − J 3 − I 1 based models capture volumetric transformation strain, asymmetry, and pressure dependence. 28,29 Due to the inherent complexity of the model formulations, the authors advise the interested readers to reference the available publications 29,30 for more details regarding the model derivations and implementations. In the following simulation work, a three-dimensional finite element analysis model was developed to match the beam bending boundary value problems.…”

Section: Simulation Resultsmentioning

confidence: 99%

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Phase Transformation Characteristics of High-Temperature Shape Memory Alloy under Tension, Compression, and Bending Actuation Cycling

Martin

Lagoudas

2020

AIAA Scitech 2020 Forum

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Shape Memory Alloys (SMAs) are a unique class of intermetallic alloys that can cyclically sustain large deformations and recover a designed geometry through a solid-to-solid phase transformation. SMAs provide favorable actuation energy density properties, making them suitable for engineering applications requiring a significant, repeated, work output. To facilitate the development and validation of an SMA constitutive model considering the evolving anisotropic material response for High-Temperature SMA (HTSMA), uniaxial and pure bending actuation cycling tests on HTSMA specimens are performed by a custom-built testing frames. The phase transformation characteristics for Ni50.3TiHf20 HTSMA under uniaxial tension/compression and four-point bending actuation cycles are investigated. The experimental results show that the polycrystalline HTSMAs has a strong tension-compression asymmetry under uniaxial actuation cycling loading conditions. Furthermore, the four-point beam bending test shows that there is an intrinsic phenomenon when HTSMAs are subjected to cyclic actuation bending conditions, i.e., the zero-strain neutral axis shifts as a result of the asymmetric tension-compression phase transformations and the asymmetric generation of TRIP strains on different sides of the beam. The conducted experiments provide invaluable information to develop and improve the SMA constitutive model considering tension-compression asymmetry and TRIP strain generation within a unified modeling effort. As future work, additional experiments on other HTSMA components, such as torque tubes and specimens with notches or cutouts, under actuation cycling would provide more comprehensive validation data and component performance for HTSMA-based actuators.

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Section: Simulation Resultsmentioning

confidence: 99%

“…The finite element model consists of 1/4 th of the total structure to represent symmetry along the length and width to reduce computational effort. A combination constitutive model based on the work of Xu et al 18 and Hartl et al 29 is used in this simulation.…”

Section: Simulation Resultsmentioning

confidence: 99%

Phase Transformation Characteristics of High-Temperature Shape Memory Alloy under Tension, Compression, and Bending Actuation Cycling

Martin

Lagoudas

2020

AIAA Scitech 2020 Forum

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“…The need to craft an appropriate cost function for optimization is noted as being critical to producing effective results and is emphasized in their work. Other work aimed at creating materials science modeling capabilities suitable for design needs includes the work of Hartl et al [38], who have created an efficient modeling capability aimed at capturing microscale single crystalline shape memory alloy responses needed for design and property optimization. This capability is expected to provide significant efficiency improvements for the analysis of these materials while maintaining robustness in the analysis results.…”

Section: Methodsmentioning

confidence: 99%

Interdisciplinary Research on Designing Engineering Material Systems: Results From a National Science Foundation Workshop

Arróyave

Shields

Chang

et al. 2018

Journal of Mechanical Design

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We present the results from a workshop on interdisciplinary research on design of engineering material systems, sponsored by the National Science Foundation. The workshop was prompted by the need to foster a culture of interdisciplinary collaboration between the engineering design and materials communities. The workshop addressed the following: (i) conceptual barriers between materials and engineering design research communities; (ii) research questions that the interdisciplinary field of materials design should focus on; (iii) processes and metrics to be used to validate research activities and outcomes on materials design; and (iv) strategies to sustain and grow the interdisciplinary field. This contribution presents a summary of the state of the field-elicited through extensive guided discussions between representatives of both communities-and a snapshot of research activities that have emerged since the workshop. Based on the increasing level of sophistication of interdisciplinary research programs on design of materials it is apparent that the field is growing and has great potential to play a key role in a vibrant interdisciplinary materials innovation ecosystem. Sustaining such efforts will contribute significantly to the advancement of technologies that will impact many industries and will enhance society-wide health, security, and economic well-being.

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“…Many researchers have tried to model the hysteresis behavior. 13–16 Hysteresis as a kind of internal loss of the material behavior emerges between the input and output of smart materials such as piezoelectric, 17 magnetic shape memory alloys (MSMAs), 18 magnetostrictive 19 , and magneto-rheological (MR) dampers. 20 SMAs hysteresis has a particular complexity because of its wide saturation curve and asymmetry in the heating and cooling paths.…”

Section: Introductionmentioning

confidence: 99%

Development of a frequency-dependent constitutive model for hysteresis of shape memory alloys

Shakiba

Yousefi‐Koma

Ayati

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this study, a constitutive model based on Liang-Rogers’s relations is developed to characterize the effect of the excitation frequency in the hysteresis of shape memory alloys. Shape memory alloys are good candidates as smart actuators because of their high strain and power density, although the complex hysteresis behavior barricades their usage. Although constitutive models are one of the most potent methods to predict the shape memory alloys behavior, they cannot consider the effect of excitation frequency in active applications. In this paper, the Liang-Rogers model is modified to consider this effect using a linear relation between the excitation frequency and martensite transformation temperatures. A shape memory alloy-driven actuator as a morphing wing is employed to characterize the frequency effect on shape memory alloy hysteresis. Experimental results show that the hysteresis is widened when the excitation frequency increases. The modeling results show that the original model significantly fails to predict the correct behavior when the frequency increases, whereas the proposed model can adequately handle the frequency effect on the behavior of the shape memory alloy-driven actuator.

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Computationally-efficient modeling of inelastic single crystal responses via anisotropic yield surfaces: Applications to shape memory alloys

Cited by 11 publications

References 71 publications

Phase Transformation Characteristics of High-Temperature Shape Memory Alloy under Tension, Compression, and Bending Actuation Cycling

Phase Transformation Characteristics of High-Temperature Shape Memory Alloy under Tension, Compression, and Bending Actuation Cycling

Interdisciplinary Research on Designing Engineering Material Systems: Results From a National Science Foundation Workshop

Development of a frequency-dependent constitutive model for hysteresis of shape memory alloys

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