Identifying Magnitudes and Locations of Multiple Loads and the Resultant of a Distributed Load on a Slender Beam Using Strain Gage Based Methods

作     者：Bednarz, E. T., III Zhu, W. D. Smith, S. A. 

作者机构：Univ Maryland Baltimore Cty Dept Mech Engn 1000 Hilltop Circle Baltimore MD 21250 USA 

出 版 物：《EXPERIMENTAL TECHNIQUES》 (实验技术)

年 卷 期：2016年第40卷第1期

页      面：15-25页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 080102[工学-固体力学] 

基　　金：National Science Foundation [CMMI-0600559] 

主　　题：Strain Gages Shear Gages Load Identification Force Transducer Multiple Loads Distributed Load 

摘      要：Unique strain gage based methods are developed to identify magnitudes and locations of multiple loads and the resultant of a distributed load on a slender beam. Four uniaxial strain gages mounted to the bottom surface of the beam create a force transducer capable of identifying the magnitude and location of a load inside the weight area, where the load can be a concentrated or distributed load. For the case of multiple loads separated by two or more strain gage locations, uniaxial strain gages forming multiple force transducers can still identify the magnitudes and locations of all the loads. However, this creates an ill-posed problem for loads separated by only one strain gage location. A new method has been developed using two shear gages mounted on the neutral axis of the beam, one on each side of a load, to identify the magnitude of the load in this case. A combination of two uniaxial strain gages and two shear gages, with one uniaxial strain gage and one shear gage at the same location on each side of a load, can be used to identify the location of the load. The strain gage based methods are experimentally validated on a prismatic beam with rest boundary conditions.