摘要:

A simple method of measuring Lamb wave phase velocities is used to obtain data for the lowest symmetric Lamb mode and the lowest antisymmetric Lamb mode for composite laminates. The experimental data are compared with the results from an approximate theory for the lowest Lamb modes in the low frequency, long wavelength region for a unidirectional laminate, a symmetric cross-ply laminate, a symmetric quasi-isotropic laminate and an aluminum plate. There is good correlation between the data and the results from the approximate theory, which suggests that the approximate theory works well in the low frequency, long wavelength region in these cases. Also, this experimental procedure of measuring phase velocities of the lowest symmetric and antisymmetric modes can be used to characterize laminated composite plates with and without damage since each material and stacking sequence gives distinct lowest symmetric and antisymmetric curves

ISSN:0278-0895    

DOI:10.1080/02780898808952944

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The distribution, concentration and orientation of stainless steel fibre-filled polypropylene composites were determined by using an eddy-current probe designed for this purpose. A contour map showing resistance components of the impedance of a probe scanning a sample gave a pattern closely resembling that at a radiograph of that sample

ISSN:0278-0895    

DOI:10.1080/02780898808952945

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

A contour graphics representation has been used to analyse the data obtained from a prototype gamma-ray compton imaging device and compared with those from a simple histogram method previously described

ISSN:0278-0895    

DOI:10.1080/02780898808952946

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

ISSN:0278-0895    

DOI:10.1080/02780898808952947

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor