Three-dimensional load analysis of indentation stimulators.
Three-dimensional load analysis of indentation stimulators.
复制标题
压痕刺激器的三维载荷分析。
DOI：
10.1016/s0165-0270(02)00326-6
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发表时间：
2003
影响因子：
3
通讯作者：
Grigg,Peter
中科院分区：
文献类型：
--
作者：
Bove,GeoffreyM;Robichaud,DanielR;Grigg,Peter
三种类型的压痕刺激器：灯丝压头、弹力计压头和机电刺激器，通过驱动每个装置对着三个方向的称重传感器进行了评估。纤维压头产生的轴向载荷与屈曲程度无关。纤维产生的离轴载荷随着纤维屈曲程度的增加而增加，其大小最高可达轴上载荷的25%。反复使用灯丝产生的载荷的大小是非常一致的。偏置灯丝压头的把手改变了离轴载荷的大小和方向。因为这些因素在手持试验中没有得到很好的控制，所以离轴负荷在手持试验中变化更大。当手持弹簧规刺激器时，非常容易产生较大的离轴载荷。当离轴载荷较大时，弹簧规指示器低估了真实的轴上载荷。机电刺激器产生的载荷具有非常高的一致性，并且可以被布置成产生非常小的离轴载荷。
The properties of three types of indentation stimulators: filament indenters, a spring gauge indenter, and an electromechanical stimulator, were evaluated by actuating each device against a 3-direction load cell. The on-axis loads produced by filament indenters were independent of the degree of buckling. The off-axis loads produced by a filament increased with the degree of buckling of the filament, and had magnitudes that were up to 25% of the on-axis load. Repeated applications of a filament produced loads whose magnitudes were very consistent. Offsetting the handle of a filament indenter altered the magnitude and the direction of the off-axis load. Because these factors were poorly controlled in hand held trials, off-axis loads were more variable in hand held trials. The spring gauge stimulator was, when hand held, very susceptible to creating large off-axis loads. When the off-axis loads were large, the spring gauge indicator underestimated the true on-axis loads. The electromechanical stimulator produced loads with a very high degree of consistency and could be arranged so that it produced very small off-axis loads.