Design Optimization of Blast Resistant CFRP-steel Composite Structure Based on Reliability Analysis

Abstract

This study presents the effectiveness of a composite structure at improving blast resistance. The proposed composite structure consists of carbon fiber reinforced polymer (CFRP) and steel layers. While CFRP layer is used for blast energy reflection due to its high strength, steel layer is used for blast energy absorption due to its high ductility. A dynamic model is used to simulate the elastoplastic behavior of the proposed composite structure subject to blast load. Considering the magnitude variations of a blast event, the probability of failure of each layer is evaluated using reliability analysis. By assigning design probability of failure of each layer in the composite structure, the thickness of layers is optimized. A case study for the design of CFRP-steel composite structure subjected to an uncertain blast event is also presented.

Design Optimization of Explosion-Resistant System Consisting of Steel Slab and CFRP Frame

“…The titanium layer and the aluminum layer were simulated as reflecting and absorbing members, respectively. Moreover, the optimal hybrid system containing CFRP and steel layers that was subjected to the same explosion source was also found with the present work [ 23 ]; the CFRP layer was considered as a reflecting layer, and the steel layer was considered as an absorbing layer. The observation from the previous work showed optimal thicknesses of 8 and 138 mm for the CFRP and steel layers, respectively.…”

“…For practical modeling, it is worth considering the material behavior under the strain loading rate [15][16][17][18]. Because deterministic explosion simulation cannot provide a powerful design, given the considerable sensitivity of explosion simulation to many unclear parameters controlling the explosion [19], a reliability-based approach for designing explosion-proof composites has been suggested [20][21][22][23]. The literature review showed the tremendous application of CFRP on strengthening old structures as well as independent members for resisting explosive impact.…”

Design Optimization of Safety Barrier Consisting of Steel Rail and CFRP Post

“…에 대한 기존의 연구에서 찾아 볼 수 있다 (Sheyka et 기존의 연구에서 에너지 al. 2011, Kim et al, 2012. 를 저항하고 흡수하는 구조로 각각 티타늄과 알루미 늄이 제안되었고 더 큰 충격하 (Sheyka et al 2011 (Biggs 1982, Chopra 2001 .…”