International Journal of Structural Integrity: Volume 7 Issue 4

Unit-cell-based derivation of the material models for armor-grade composites with different architectures of ultra-high molecular-weight polyethylene fibers

Mica Grujicic, Jennifer Snipes, S Ramaswami, Vasudeva Avuthu, Chian-Fong Yen, Bryan Cheeseman

Traditionally, an armor-grade composite is based on a two-dimensional (2D) architecture of its fiber reinforcements. However, various experimental investigations have shown that…

Finite element analysis of steel structures – a review of useful guidelines

Miguel Abambres, Mário Rui Arruda

Since the use of advanced finite element analysis (FEA) in the design of steel structures has been increasing its popularity in order to avoid unsafe or highly conservative…

Improvement in head blast-protection via the use of polyurea-augmented advanced combat helmet: Experimental investigation and computational analysis

Mica Grujicic, S Ramaswami, Jennifer Snipes, Ramin Yavari, Philip Dudt

The purpose of this paper is to optimize the design of the advanced combat helmet (ACH) currently in use, by its designers in order to attain maximum protection against ballistic…

Numerical investigations on delaminated Glare under uni-axial tension

Sunil Bhat, S. Narayanan

Since failure of laminated composites by delaminations is common, the purpose of this paper is to present a numerical procedure to check the stability of delaminations in fiber…

Reliability-based fracture analysis with uncertainty on material degradation

Sohrab Astaraki

The purpose of this paper is to quantify uncertainty design parameters of long service usage material and including their effects explicitly in analysis of fracture toughness for…

Improving condition indicators for helicopter health and usage monitoring systems

Faris Elasha, David Mba

– The purpose of this paper is to suggest new method for improving the condition indicators (CIs) used in health and usage monitoring system based on signal separation of gears.