Abstract
The load carrying capacity of thin-walled shell structures, when designed unstiffened, is highly sensitive to imperfections. In order to study the impact of geometric and thickness imperfections on the load carrying capacity of a thin-walled structure, these imperfections need to be measured. Therefore, in this paper, the development of a measurement system for measuring geometric and thickness imperfections of cylindrical structures with two laser sensors is introduced. Application, design and functionality of the measurement system are discussed in detail in this paper. In addition, the measurement of an unstiffened isotropic test specimen is evaluated. A measurement noise of 30 μm was detected and filtered using a median filter. The maximum measurement error is 68 μm. The imperfection magnitude for the PL1 shell structure lies in the order of w∈[-0.317mm,0.299mm]. The maximal thickness deviation is in the range of treal∈[0.155mm,0.226mm].
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