Actuation-Induced stable crack growth in near-equiatomic nickel-titanium shape memory alloys: Experimental and numerical analysis
Actuation-Induced stable crack growth in near-equiatomic nickel-titanium shape memory alloys: Experimental and numerical analysis
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近等原子镍钛形状记忆合金中驱动诱导的稳定裂纹扩展：实验和数值分析
DOI：
10.1016/j.ijsolstr.2020.09.032
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发表时间：
2021
影响因子：
3.6
通讯作者：
Karaman, I.
中科院分区：
文献类型：
--
作者：
Jape, S.;Young, B.;Haghgouyan, B.;Hayrettin, C.;Baxevanis, T.;Lagoudas, D.C.;Karaman, I.
形状记忆合金（SMA）驱动技术需要彻底了解这些合金在涉及热变化的负载（称为“驱动”负载）下的失效响应。本文首次报道了SMA紧凑拉伸试件在恒定偏压下随温度变化时裂纹稳定扩展的实验观察。促进裂纹前进的内在损伤机制是文献中报道的名义上等温过载断裂的机制，即，解理由韧性空隙生长辅助。此外，采用数值分析，并将得到的模拟与实验数据进行比较，目的是建立信心的洞察力提供的外在机制，进一步促进或阻碍裂纹前进的作用。它的结论是，相变起着双重作用的裂纹扩展动力学，促进裂纹扩展时，发生在一个风扇在裂纹尖端的前面，并提供韧性增强，导致稳定的裂纹扩展时，留在前进的裂纹。虽然后者是众所周知的相变引起的韧性增强，前者最近刚刚被实验观察到，并受到致动载荷条件下的SMA的特性。
Shape Memory Alloy (SMA) actuation technology requires a thorough understanding of the failure response of these alloys under loading that involves thermal variations, termed “actuation” loading. In this paper, the experimental observation of stable crack growth in SMA compact tension specimens during temperature changes under constant bias loads is reported for the first time. The intrinsic damage mechanisms that promote crack advance are those reported in literature for nominally isothermal overload fracture,i.e., cleavage assisted by ductile void growth. Moreover, a numerical analysis is employed, and the resulting simulations are compared with the experimental data with the purpose of building confidence in the insight provided on the role of extrinsic mechanisms that further promote or impede crack advance. It is concluded that phase transformation plays a dual role on the crack growth kinetics by promoting crack growth when occurring in a fan in front of the crack tip and providing the toughness enhancement that results in stable crack growth when left in the wake of the advancing crack. While the latter is well known as transformation-induced toughness enhancement, the former has just been recently observed experimentally and is characteristic of SMAs subjected to actuation loading conditions.
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形状记忆合金热驱动过程中稳定的裂纹扩展
影响因子：
2.2
作者：
S. Jape;T. Baxevanis;D. Lagoudas
通讯作者：
D. Lagoudas
热循环 TiNi 中的相变行为和形状记忆
DOI：
--
发表时间：
1972
期刊：
影响因子：
--
作者：
C. M. Wayman;I. Cornelis;K. Shimizu
通讯作者：
K. Shimizu
影响因子：
9.4
作者：
K. Atli;I. Karaman;R. Noebe;A. Garg;Y. Chumlyakov;I. Kireeva
通讯作者：
K. Atli;I. Karaman;R. Noebe;A. Garg;Y. Chumlyakov;I. Kireeva
一种基于断裂力学的方法，用于控制由超弹性镍钛诺管制造的生物医学设备的断裂。
DOI：
10.1002/jbm.b.30840
发表时间：
2008
期刊：
Journal of biomedical materials research. Part B, Applied biomaterials
影响因子：
--
作者：
S. W. Robertson;R. Ritchie
通讯作者：
R. Ritchie
形状记忆合金热机输出功率特性的基础研究：（双曲柄热机）
DOI：
--
发表时间：
1988
期刊：
影响因子：
--
作者：
H. Iwanaga;H. Tobushi;Hiromichi Ito
通讯作者：
Hiromichi Ito