| Title |
Investigation of textiles elastic properties with a pendulum impact device / |
| Authors |
Valatkienė, Loreta ; Strazdienė, Eugenija ; Issa, Manal |
| Full Text |
|
| Is Part of |
Fibres and textiles in Eastern Europe.. Lodz : Institute of Chemical Fibres. 2008, vol. 16, iss. 2, p. 52-57.. ISSN 1230-3666. eISSN 2300-7354 |
| Keywords [eng] |
impact behaviour ; vibration process ; rebound elasticity ; dynamic elasticity |
| Abstract [eng] |
This investigation concerns the estimation of materials impact behaviour based on the registration of vibration during the pendulum process. In order to find optimal testing conditions, three types of materials: woven fabric, knitted material and polyethylene membrane were chosen and two bobs of different weight and radius (r(1)=13.5 mm, r(2)=30 mm) were applied. The initial angles alpha(0) of the pendulum were: 1; 2; 3; 4 and 5 degrees. To describe the impact behavior of the materials, the impact values and rebound angles of each stroke were used and the elasticity properties of the materials were determined: rebound elasticity 6, and dynamic elasticity epsilon(d), on the basis of the initial potential energy V-0 of the pendulum and its energy after one full swing V-1. A close relationship exists between rebound elasticity C, dynamic elasticity ed and initial angles alpha(0) of the pendulum for all the test materials under different testing conditions. Percentage values of absorbed energy H-1 of the test materials at the first moment of pendulum impact were calculated. It was established that linear regression analysis can be applied to establish dependencies between absorbed energy H-1 of the material at the moment of first impact, as well as the pendulum potential energy V-1 after a full swing period and the first rebound angle alpha(1). |
| Published |
Lodz : Institute of Chemical Fibres |
| Type |
Journal article |
| Language |
English |
| Publication date |
2008 |
| CC license |
|
