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Rheology of Carbon Fiber Thermoplastic Polymer Composites
26 Apr 2021 | Online Presentations | Contributor(s): Johnathan Goodsell
The rheology of fiber–reinforced thermoplastic composites will be presented with specific focus on several topics studied over the past three decades. Interest in the elongational viscosity of collimated, discontinuous fiber systems was initiated by the introduction of impregnated,...
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Skill of Using Surface Element in ANSYS
26 Mar 2015 | Downloads
Dear All, For those ANSYS users, please check the attached skill of using surface element, “Surface_Effect_Elements.pdf”, to apply the surface tangent traction. It works well for homogenization simulations, and also for some beams structure validations. This attached zip file also...
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Structural Self-sensing Based on Measuring the Resistance, Capacitance or Inductance of the Structural <aterial, Without Sensor Incorporation
06 Nov 2023 | Online Presentations | Contributor(s): Johnathan Goodsell
Structural self-sensing refers to a structural material sensing itself without sensor incorporation. Compared to sensor incorporation, advantages include low cost, high durability, large sensing volume and the mechanical properties being not degraded. The self-sensing ability makes the structural...
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Structure Genome: Fill the Gap between Materials Genome and Structural Analysis
29 Nov 2014 | Publications
A new concept, Structure Genome (SG), is proposed to fill the gap between materials genome and structural analysis. SG acts as the basic building block of the structure connecting materials to structures and the mechanics of SG governs the necessary information to link materials genome and...
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Sustainable Manufacturing of Composite Materials
21 May 2021 | Online Presentations | Contributor(s): Johnathan Goodsell
The growing use of composite materials in aerospace, transportation, recreational products and renewable energy production manufacturing has created a critical need for low-cost sustainable manufacturing methods. The current methods of consolidation and cure are not compatible with the projected...
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The Challenges of Determining the Strength of Composites
24 Nov 2020 | Online Presentations | Contributor(s): Johnathan Goodsell
Why are there such large differences in reported strengths of composites? Some of the reasons are the definition of strength, material variability, poor test methods, and subtle variations in carrying out the tests. But there are other important factors that affect strength that are not...
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The Story of Permeability in Liquid Composite Molding (LCM): How to Devise and Validate Process Simulation Software?
13 Apr 2022 | Online Presentations | Contributor(s): Johnathan Goodsell
Permeability characterizes the capability of establishing a fluid flow through a porous medium. This lecture aims to present a summary on the state-of-the-art knowledge on permeability in LCM together with a discussion on open questions. The Story of Permeability in Liquid Composite Molding (LCM)...
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US-COMP: Next Generation of Composites Materials for Crewed Deep Space Missions
15 Dec 2023 | Online Presentations | Contributor(s): Johnathan Goodsell
Current state-of-the-art composite materials are not light/strong enough for crewed missions to Mars and beyond. Structural components of deep space vehicles require lighter/stronger materials for fuel efficiency. The NASA Space Technologies Research Institute (STRI) for Ultra-Strong Composites...
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VUMAT of a Generalized Standard Continuum Damage Model
13 Apr 2018 | Downloads
Based on a recently developed generalized standard continuum damage model (CDM), this VUMAT user subroutine provides a rigorous and robust framework for implementing various damage behavior into 2D or 3D solid elements in a finite element analysis (FEA). It is designed to be used with...
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Woven fabrics UMAT- a coupled material model
02 Aug 2017 | Downloads
One of the advantages of woven fabrics over unidirectional prepregs is their superior formability thanks to the large shear deformation capability. There exists, however, a limit on the shear deformation of woven fabrics, namely the wrinkling. Applying tension to delay wrinkling during forming...