tailieunhanh - A cell-based smoothed discrete shear gap method (CS-FEM-DSG3) for dynamic response of laminated composite plate subjected to blast loading

The paper investigates the dynamic response of laminated composite plate under the effect of blast loading. The cell-based smoothed discrete shear gap method (CSFEM-DSG3) based on the first-order shear deformation theory (FSDT) and the equivalent layer theory (ELT) is used to model the behavior of the laminated composite plate. | Vietnam Journal of Mechanics, VAST, Vol. 37, No. 2 (2015), pp. 81 – 90 DOI: A CELL-BASED SMOOTHED DISCRETE SHEAR GAP METHOD (CS-FEM-DSG3) FOR DYNAMIC RESPONSE OF LAMINATED COMPOSITE PLATE SUBJECTED TO BLAST LOADING Dang Trung Hau, Nguyen Thoi My Hanh, Nguyen Thoi Trung∗ Ton Duc Thang University, Ho Chi Minh City, Vietnam ∗ E-mail: nguyenthoitrung@ Received September 24, 2014 Abstract. The paper investigates the dynamic response of laminated composite plate under the effect of blast loading. The cell-based smoothed discrete shear gap method (CSFEM-DSG3) based on the first-order shear deformation theory (FSDT) and the equivalent layer theory (ELT) is used to model the behavior of the laminated composite plate. The blast loading is simulated by a time diagram of rectangular, triangular, exponential, or sinusoidal shape. The effects of the number of layers and fiber orientation to the displacement and stress fields of the laminated composite plate are discussed. Numerical results demonstrated the accuracy and reliability of the present method compared with previous published methods. Keywords: Laminated composite plate, blast loading, cell-based smoothed discrete shear gap method (CS-FEM-DSG3), first-order shear deformation theory (FSDT), equivalent layer theory (ELT). 1. INTRODUCTION Nowadays, laminated composite plate has become one of indispensable components in numerous engineering structures varying from automotive industry, civil infrastructure to aerospace structures. Owning to many superior properties such as high stiffness, light weight, long fatigue life, flexible fiber orientation, electric resistant, etc, the laminated composite plate is expected to sustain over many difficult situations. Among them, blast loading, an intensive high load happening in a very short time, is one of the most challenging situations that the laminated composite plate may undergo during its operation. Hence, analyzing the dynamic response