Search Results - mahmoodul+haq

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High Strain Rate Tensile Testing Apparatus

Executive Summary Characterizing the material response of thermoplastic polymers at intermediate strain rates (1s-1 to ≤ 200s-1), commonly encountered in automotive collisions and crashes, is critical for predicting their failure strength and post-impact behavior. However, investigative experimental techniques required to generate tensile stress-strain...
Published: 6/28/2024   |   Inventor(s): Mahmoodul Haq, Syed Hassan, Oleksii Karpenko
Keywords(s):   Category(s): Test and Measurement

High Performance Reversible Adhesive System

Executive Summary In many applications, the ability to debond adhered substrates is advantageous as this can significantly reduce removal time and costs. However, to date, reversible adhesive systems with the proper balance of performance under a variety of environmental conditions and debonding time have not been developed. MSU researchers have recently...
Published: 9/29/2023   |   Inventor(s): Erik Stitt, Mahmoodul Haq, Lawrence Drzal
Keywords(s):   Category(s): Advanced Materials, Manufacturing Equipment

Novel, Multi-Impact, Energy Diverting, Energy Absorbing, Repairable Helmets

Executive Summary This technology addresses brain injuries while wearing a helmet. A novel technique adds an outer layer to helmet shells to absorb multiple impacts and divert energy away for the skull to reduce concussions. The innovation can also reduce projectile penetration in a way that is repairable and re-healable for low or multiple low-velocity...
Published: 2/28/2024   |   Inventor(s): Mahmoodul Haq, Lawrence Drzal
Keywords(s):   Category(s): Advanced Materials, Defense, Transportation

Active, Tailorable, Reversible Adhesives for Structural Multimaterial Joining and Facile Repair, and Re-Assembly

Executive SummaryLightweight material joining is of special interest in automotive, aerospace, defense and marine industries. The structural joining of similar and dissimilar materials utilizing conventional fastening techniques require drilling holes, increasing weight and inviting stress concentrations. Adhesive joints have gained popularity due to...
Published: 8/20/2022   |   Inventor(s): Mahmoodul Haq, Ermias Koricho, Lawrence Drzal
Keywords(s):   Category(s): Advanced Materials

Scanning interferometry technique for through-thickness defect/damage evaluation in multi-layered transparent structures

IntroductionHigh-strength, impact-resistant windshields, security components, and other multi-layered transparent composites (TC) are often constructed with glass and polymer laminates. Precise measurement of flaws in these structures, in all three dimensions, has not been possible. As a result, manufacturing costs include unnecessary scrap, and components...
Published: 6/8/2021   |   Inventor(s): Anton Khomenko, Mahmoodul Haq, Gary Cloud
Keywords(s):   Category(s): Test and Measurement