發送短信 : Free vibration of exponential functionally graded beams with single delamination

  ______    ______   _    _      ___      _  __  
 /_   _//  /_   _// | |  | ||   / _ \\   | |/ // 
   | ||     -| ||-  | |/\| ||  | / \ ||  | ' //  
  _| ||     _| ||_  |  /\  ||  | \_/ ||  | . \\  
 /__//     /_____// |_// \_||   \___//   |_|\_\\ 
 `--`      `-----`  `-`   `-`   `---`    `-` --`