Thermomechanical modeling of polycrystalline SMAs under cyclic loading, Part II: material characterization and experimental results for a stable transformation cycle

Lagoudas, Dimitris C.; Bo, Zhonghe

doi:10.1016/s0020-7225(98)00114-1

Cited by 146 publications

(99 citation statements)

References 24 publications

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“…Phenomenological constitutive models have been presented by Tanaka (1986), Liang and Rogers (1992), Brinson (1993) and Boyd and Lagoudas (1996a), among others. A model able to capture training of NiTi-based SMA wires as well as the two-way SME has recently been published by Bo and Lagoudas (1999a,b,c) and Lagoudas and Bo (1999). A model representative of the rate-dependent models for SMAs has been presented by Abeyaratne and Knowles (1993).…”

Section: Introductionmentioning

confidence: 99%

Modeling porous shape memory alloys using micromechanical averaging techniques

Entchev

Lagoudas

2002

Mechanics of Materials

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Section: Introductionmentioning

confidence: 99%

Modeling porous shape memory alloys using micromechanical averaging techniques

Entchev

Lagoudas

2002

Mechanics of Materials

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“…al. 19 which was further refined by Bo and Lagoudas [7][8][9][10] . The analysis showed that a temperature change of 3 o C was sufficient in generating a deflection of amplitude = 32.58 mm.…”

Section: Sma Actuation Based Designmentioning

confidence: 99%

<title>Active skin for turbulent drag reduction</title>

Rediniotis

Lagoudas

Mani

et al. 2002

Smart Structures and Materials 2002: Smart Electronics, MEMS, and Nanotechnology

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Drag reduction for aerial vehicles has a range of positive ramifications: reduced fuel consumption with the associated economic and environmental consequences, larger flight range and endurance and higher achievable flight speeds. This work capitalizes on recent advances in active turbulent drag reduction and active material based actuation to develop an active or "smart" skin for turbulent drag reduction in realistic flight conditions. The skin operation principle is based on computational evidence that spanwise traveling waves of the right amplitude, wavelength and frequency can result in significant turbulent drag reduction. Such traveling waves can be induced in the smart skin via active-material actuation. The flow control technique pursued is "micro" in the sense that only micro-scale wave amplitudes (order of 30mm) and energy inputs are sufficient to produce significant benefits. Two actuation principles have been proposed and analyzed. Different skin designs based on these two actuation principles have been discussed. The feasibility of these different actuation possibilities (such as Shape Memory Alloys and Piezoelectric material based actuators) and relative merits of different skin designs are discussed. The realization of a mechanically actuated prototype skin capable of generating a traveling wave, using a rapid prototyping machine, for the purpose of validating the proposed drag reduction technique is also presented.

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“…The model is an extension of the one-dimensional model presented by Bo and Lagoudas [28][29][30][31] to three dimensions.…”

Section: Constitutive Model For Fully Dense Smamentioning

confidence: 99%

<title>Effect of transformation induced plasticity on the mechanical behavior of porous SMAs</title>

2002

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The fabrication of porous NiTi Shape Memory Alloy (SMA) from elemental Ni and Ti powders using Hot Isostatic Press (HIP) is presented in this work. Porous NiTi alloys with different porosity levels and different mechanical properties are obtained and analyzed. Their behavior under compressive mechanical loading is modeled using a micromechanical averaging model. The model treats the porous NiTi alloy as a two-phase composite: dense SMA matrix and pores. The behavior of the fully dense SMA matrix is modeled using a thermomechanical model with internal state variables. The development of transformation and plastic strains during the martensitic phase transformation is taken into account. The results from the model are compared with the experimental data.

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Thermomechanical modeling of polycrystalline SMAs under cyclic loading, Part II: material characterization and experimental results for a stable transformation cycle

Cited by 146 publications

References 24 publications

Modeling porous shape memory alloys using micromechanical averaging techniques

Modeling porous shape memory alloys using micromechanical averaging techniques

<title>Active skin for turbulent drag reduction</title>

<title>Effect of transformation induced plasticity on the mechanical behavior of porous SMAs</title>

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