Reply to the comments on “A nonlinear dynamic uniaxial strength criterion that considers the ultimate dynamic strength of concrete by Dechun Lu, Guosheng Wang, Xiuli Du, Yang Wang. Int J Impact Eng 103 (2017), 124-137” by Xu and Wen

- The roots of Lu criterion and Xu-Wen criterion are discussed.
- The characteristics of Lu criterion and Xu-Wen criterion are analyzed.
- Xu and Wen's comments are responded point by point.