Shape Memory Alloy (SMA) composites are being increasingly investigated to address a variety of engineering problems. An application of growing interest is an SMA-MAX phase ceramic composite for use in extreme environments. By joining these two constituents, it is intended that the martensitic transformation of the SMA phase may be used with the unique kinking behavior of the MAX phases to improve the composite response. One particular intended outcome of this utilization is the development of residual stress states in the composite. These residual stress states are generated due to the formation of irrecoverable strains resulting from the interaction of the inelastic mechanisms in the system. By tailoring this stress state, the improved mechanical response of the ceramic phase under compression may be taken advantage of. These residual stress states and their effect on the effective thermomechanical response of the composite are explored in this work. To this end, a finite element model of the composite is development. Specifically, a recent 3D phenomenological constitutive model of the SMA phase is incorporated to describe the effects of martensitic transformation and a constitutive assumption for the MAX phase response associated with kink band formation is introduced. An additional non-transforming NiTi phase is noted and the role of its constitutive response is considered. This model is used to study the micromechanics of the associated composite residual stress states. The influence of these residual stresses on the effective actuation response is then investigated and the on the associated composite behavior determined. Specifically, it is shown that the variation in inactive NiTi leads to an altered actuation response.
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ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 16–18, 2013
Snowbird, Utah, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5604-8
PROCEEDINGS PAPER
Modeling of the Effective Actuation Response of SMA-MAX Phase Composites With Partially Transforming NiTi
Brian T. Lester
,
Brian T. Lester
Texas A&M University, College Station, TX
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Dimitris C. Lagoudas
Dimitris C. Lagoudas
Texas A&M University, College Station, TX
Search for other works by this author on:
Brian T. Lester
Texas A&M University, College Station, TX
Dimitris C. Lagoudas
Texas A&M University, College Station, TX
Paper No:
SMASIS2013-3200, V002T02A016; 10 pages
Published Online:
February 20, 2014
Citation
Lester, BT, & Lagoudas, DC. "Modeling of the Effective Actuation Response of SMA-MAX Phase Composites With Partially Transforming NiTi." Proceedings of the ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 2: Mechanics and Behavior of Active Materials; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting. Snowbird, Utah, USA. September 16–18, 2013. V002T02A016. ASME. https://doi.org/10.1115/SMASIS2013-3200
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