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Achieving selective snapping-back and enhanced hysteresis in soft mechanical metamaterials via fibre reinforcement

Submitted by Jinxiong Zhou on
research
Mechanical Metamaterial; Snapping-back; fibers reinforcement; Energy dissipation

When a soft mechanical metamaterial, consisting of a regular array of representative volume elements (RVE), is stressed up to a large strain, the delicately tailored behavior of the RVE does not prevail in the metamaterial due to boundary effect and manufacturing imperfections. A metamaterial sheet comprising RVEs designed for snapping-back behavior exhibits random snapping-through instability when uniaxially stretched. We conceptualize that loss of representativeness of RVE can be avoided by introducing fibre reinforcement to regulate boundary conditions.

Development and Characterization of Ti/SiC Metal Matrix Nanocomposite Coating with Superior Surface Properties

Submitted by pouyashojaei on
research
composite materials
coatings
Metal Matrix Composite
hypervelocity impact
Smoothed Particle Hydrodynamics

In this work, a Ti/SiC metal matrix nanocomposite (MMNC) coating was produced on Ti-6Al-4V substrate by Selective Laser Melting (SLM) technique. The MMNC coating had 7% SiC and 93% Ti by volume. It was observed that applying the nanocomposite coating on titanium substrate significantly reduced the wear and coefficient of friction (COF). By applying the coating, 108% improvement in hardness of Ti-6Al-4V substrates was obtained.

Global Composites Experts Webinar by Dr. J. N. Reddy

Submitted by Wenbin Yu on
research
cdmHUB
Global composites experts webinars

cdmHUB invites you to attend the Global Composites Experts Webinar Series. 

Title: Recent Developments in Computational Approaches to Model Laminated Composite Shells and Damage and Fracture in Solids

Speaker: Dr. J. N. Reddy

Time: 2/11, 11AM-12PM EST.

Please go to https://www.purdue.edu/cmsc/events/2020-webinars/ to register for this webinar.

 

Call for Papers: Special Issue on Advances in Integrated Digital Engineering Applications

Submitted by Lee Margetts on
research
virtual reality
machine learning
Internet of Things
Digital Twin
Digital Thread
cyber-physical systems
design
Digital Manufacturing and Design
optimisation
generative adversarial networks

Dear Colleagues,

I'm current guest editor on a Special Issue of the MDPI Journal of Applied Sciences. This is a journal with an impact factor of 2.474.

The aim of this Special Issue is to explore the re-engineering of engineering through the integration of advanced digital technologies. Research papers or case studies involving any discipline of engineering are welcome. Topics may include, but are not limited to, the following:

On the origin of supercontraction in spider silk

Submitted by noyco on
research
supercontraction
spider silk
Multiscale analysis

Spider silk is a protein material that exhibits extraordinary and nontrivial properties such as the ability to soften and decrease its length by up to ∼60% upon exposure to high humidity. This counter-intuitive process is commonly called supercontraction and is the result of a transition from a highly oriented glassy phase to a disoriented rubbery phase. In our new paper (published in biomacromolecules) we derive a model that explains the origins of the supercontraction phenomena. The insights from this work motivate the development of novel biomimetic materials.

Entropy Based Fatigue, Fracture, Failure Prediction and Structural Health Monitoring

Submitted by Cemal Basaran on
research
entropy
Fatigue
fracture
structural health monitoring

If you are interested in the most recent advances in physics-based Fatigue, Fracture, Failure Prediction, and Structural Health Monitoring
You may find this publication helpful.

free download site https://www.mdpi.com/books/pdfview/book/3299

MULTIPLE GRADUATE STUDENT openings in Mechanical & Aerospace Engineering at University of Texas at Arlington, Texas, USA.

Submitted by ashfaqadnan on
research

Our group has several openings for fully-funded graduate students in computational and experimental mechanics of biological and engineered materials. Our primary goal is to link traumatic brain injury (TBI) with multiscale, multiphysics damage evolution in the brain using experimentally verifiable computations and simulations. We are also interested in designing advanced material for TBI protection.

Experimental observations of nonlinear vibration localization in a cyclic chain of weakly coupled nonlinear oscillators

Submitted by Antonio Papangelo on
research
Coulomb friction; nonlinear dynamics; friction induced vibrations; bistability

Experimental results on nonlinear vibration localization in a cyclic chain of weakly coupled oscillators with clearance nonlinearity are reported. Numerical modelling and analysis complements the experimental study. A reduced order model is derived and numerical analysis based on the harmonic balance method demonstrates the existence of multiple classes of stable spatially localized nonlinear vibration states. The experiments agree very well with the numerical results.

Dynamic Modelling of a Hydraulic Engine Mount Including the Effects of Elastomer Aging

Submitted by Payam Soltani on
research
hydraulic engine mount
dynamics
aging
Multi body systems
DMTA

In this article, the effect of material aging of an elastomeric main spring (MS) inside a hydraulic engine mount (HEM) on its dynamic performance is investigated. A set of HEMs aged under realistic operational conditions are used to create an empirical material aging model of the elastomer at two different temperatures (35°C and 95°C) using dynamic mechanical thermal analysis (DMTA).

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