Siavash Sattar

University of Minnesota Duluth | UMD · Department of Mechanical and Industrial Engineering

A novel approach for microstructure reconstruction using artificial intelligence (MR-AI) was proposed to non-destructively measure the through-thickness average stochastic fiber orientation distribution (FOD) in a prepreg platelet molded composite (PPMC) plate. MR-AI approach uses thermal strain components on the surfaces of a PPMC plate as input t...

In this study we examined the mechanisms of graphene reinforcement in CFRP and the resulting improvements to mechanical strength, resistance to crack propagation, and thermal conductivity at elevated temperatures. Plant-based graphene nanoplatelets (pGNP), produced from renewable biomass and with flakes 3–10 layers dispersed in alcohol/water was...

Prepreg platelet molding compound (PPMC) can be used to create structural grade material with a heterogeneous mesoscale morphology. The present work considered various platelet lengths of the prepreg system IM7/8552 to study the effect of platelet length on the flexural behavior of PPMC composite. A progressive failure finite‐element analysis was u...

This study investigated the potential for improving the mechanical behavior of glass fiber polyester composites by using symmetric hybrid sandwich configurations that combine continuous woven composite and different discontinuous reinforcements used as a core. The discontinuous reinforcements included sheet molding compound (SMC), bulk molding comp...

Graphene has generated substantial interest as a filler due to its exceptional strength, flexibility, and conductivity but faces obstacles in supply and implementation. A renewable, plant‐based graphene nanoparticle (pGNP) presents a more accessible filler with the same properties as mineral graphenes. In this study, we examine the effects of pGNP,...

In this study, the hole size effect in the open hole tension (OHT) of discontinuous glass fiber-polyamide 6 organosheet composite material was studied. Organosheet used in this study is a novel long discontinuous fiber-reinforced polymer composite with long glass fiber and in-situ polymerized polyamide 6 (nylon) matrix. A progressive failure analys...

Among many thermoplastics that are used in engineering, polyamide 6 (nylon 6) is an extremely versatile engineering thermoplastic. 3D printed nylon glass fiber composites, based on fused filament modeling, typically suffer from poor bead-to-bead interfacial bonding and relatively high void content, limiting their mechanical properties. This work ex...

The present work studied the mechanical behavior of organosheets produced using 1” long glass fiber, which are incorporated within an in-situ polymerized polyamide 6 (nylon) matrix. The meso-scale morphology of the glass fiber bundles is preserved during the impregnation process, resulting in the collimated fibers. A finite-element computational mo...

In this study, a novel computational micromechanical framework is proposed to predict the effective mechanical properties of the ice‐templated ceramics under off‐axis compressive loading. The mechanical behavior is simulated by a computational micromechanical model and validated against experimental results. Smeared cracking approach was used to de...

Cold roll forming is a process in which a metal sheet gets a desired section form by passing through a series of rotating rollers. Predicting the amount of the distortion in pre-notched cold formed sections still remains challenging in cold roll forming industry, depending on the shape and position of the holes. This study investigates the influenc...