ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
A new equipment for measuring the draping characteristics of static cloth is presented inthe paper. In contrast with Kawabata Evaluation System 3D geometrical data of the sample arecaptured from photo images. Based on a mathematical reconstruction of geometry, and drapecoefficients and mechanical parameters are evaluated upon the geometrical model. The computercontrolled equipment moves a round table positioned in the centre providing the natural pleating offabric for the measuring. The core part of the equipment is a computer moved frame. The sample isscanned by laser-beams. Lasers light the cross section curves of the sample on different levels.There are four cameras on the frame taking the pictures of cross section curves in different levels.3D geometry is reconstructed upon the pictures.A mass, spring and damping element system is the basis of the cloth simulator. Springs are assumedto be linear, while damps are proportional to the velocity. The physics engine running the simulatorcalculates vertex positions at a time based on interaction forces with neighbouring vertices,including stretch, bend and shear forces. Collision of the cloth model with the model of theunderlying object is performed and handled in each time step.To evaluate the influence of the individual parameters, a series of simulations was performed. Forthe real cloth samples, a range of cross-section curves is captured, digitalized and interpolated byFourier series. The same Fourier coefficients are determined for the cloth model as a function ofsimulation parameters. The actual simulation parameters are defined by the minimum of thedifference between the modelled and the measured geometry
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.589.311.pdf
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