“Experimental Determination of Elastic Constant of Composite Materials Using Vibration Properties”, J. eng. sustain. dev., vol. 17, no. 5, pp. 20–30, Nov. 2013, Accessed: May 14, 2024. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1052