MICRO-SLIP INDUCED DAMPING IN PLANAR CONTACT UNDER CONSTANT AND UNIFORM NORMAL STRESS
MICRO-SLIP INDUCED DAMPING IN PLANAR CONTACT UNDER CONSTANT AND UNIFORM NORMAL STRESS
复制标题
恒定均匀法向应力下平面接触中的微滑移诱导阻尼
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
P. Argoul
中科院分区：
文献类型：
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作者：
N. Peyret;J. Dion;G. Chevallier;P. Argoul
螺栓连接处界面间的摩擦对结构的阻尼起着重要作用。本文研究了节点微滑移引起的能量损失。本研究的目的是定义在一个分析的方式，这些能量耗散机制，我们检查通过分析一个新的基准：弯曲振动的夹紧夹紧梁与原始定位的接口。在恒定和均匀的正应力作用下，接头表现出界面的行为。在准静态运动的假设下计算的应力和应变值的关节。该模型使我们能够理解在加载过程中沿沿着连接界面的滑移和粘着区域的演变。推导了加载过程中各阶段的应变场和应力场表达式。这些导致量化的界面内的耗散能量。使用该公式，然后可以计算非线性损耗因子。在文章的最后部分，梁的动力响应计算使用此非线性损耗因子。
The friction between interfaces at bolted joints plays a major role in the damping of structures. This paper deals with the energy losses caused by micro-slips in the joints. The aim of this study is to define in an analytical way these energy dissipation mechanisms which we examine through the analysis of a new benchmark: the flexural vibration of a clamped-clamped beam with original positioning of the interfaces. The joints exhibit the behavior of an interface under constant and uniform normal stress. The stress and strain values are computed at the joints under the assumption of quasi-static motion. This model allows us to understand the evolution of the slip and stick regions along the joint interfaces during the loading process. The expressions of the strain and stress fields during each phase of the loading process are derived. These lead to the quantification of the dissipated energy within the interface. Using this formula, a nonlinear loss factor can then be computed. In the final part of the paper, the dynamic response of the beam is calculated using this nonlinear loss factor.