The Mach Conference program is largely comprised of symposia that are organized around specific topics of interest, each of which contains one or more sessions.
Below is a list of symposia for the 2023 Mach Conference for reference:
Data-Driven Modeling of Material Deformation and Fracture A2
Organizers: Prof. Ghatu Subhash (University of Florida), Prof. Shailendra P. Joshi (University of Houston)
Summary: The view of materials as systems has paved the path for a hierarchical approach to materials-by-design. It has been fueled by the advent of novel material synthesis and manufacturing approaches, improved modeling and simulation tools, and the emergence of powerful cyberinfrastructure. The computational drivers have created unprecedented opportunities to develop data-driven approaches to material design and discovery, which can augment the linkages in the synthesis-processing-characterization pipeline. In the context of predicting microstructure-sensitive material responses, a core challenge is to perform high-fidelity experiments and computations at low cost. Such situations arise, among other, in multi-scale, multi-field problems where the physics is inherently complex, and where material behaviors are highly nonlinear and loading path dependent. Quantitative prediction of inelastic behavior of materials under multiaxial loading using data-driven approaches is emerging as a major thrust area in solid mechanics. The proposed symposium solicits abstracts in experimental and computational realms which employ machine learning and artificial intelligence approaches to predict the constitutive response and deformation modes of engineering materials across a range length and time scales. Experimental and computational paradigms that provide the necessary datasets for such data-hungry approaches are relevant to the symposium. Of particular interest is sensitivity analysis coupled with uncertainty quantification to establish a quantitative framework for the prediction of variability in material behavior, including material failure.
High strain rate mechanics of heterogeneous and porous materials
Organizers: Dr. Juan Carlos Nieto-Fuentes (UC3M, Carlos III University of Madrid -Spain), Dr. Miguel Costas (NTNU, Norwegian University of Science and Technology-Norway), Dr. Marlini Simoes (Caltech)
Summary: Dynamic failure and deformation of materials have been extensively studied for many years, as much in Physics as in Engineering communities. However, we are still seeking to properly understand, characterize and model the mechanical behavior of materials. Solid structures, especially those subjected to high-rate loading conditions–such as bird strikes on aircraft engines, ballistic impact on military armor, or vehicle crash events, to name a few –must be designed to delay to greatest extent a potential damage and failure under service. Under such conditions, the material may be exposed to an outburst of intense phenomena, that may cause, e.g., a sudden increase of temperature, microstructural transformations, geometrical changes, or internal instabilities driven by inertial loads. With the advent of innovative materials, such as those manufactured by 3D printing (inherently porous), or those with a composite (metal-ceramic) microstructure, the scenario becomes even more complex, with many more questions to be addressed. Within this general theme, three main areas will be covered in this Symposium: (1) experimental and numerical techniques, (2) material, spatial and temporal length scales and (3) failure mechanisms (including instabilities, shocks, and fragmentation).
Hypervelocity Impact Phenomena
Organizers: Justin Moreno (Johns Hopkins University), Matt Shaeffer (Johns Hopkins University)
Summary: Understanding material behavior under high velocity impacts is extremely challenging due to the quickly evolving states, range of involved length and time scales, and high energy densities. A comprehensive view of these events must incorporate an understanding of phenomena including impact flash, extreme deformation, fracture and fragmentation, granular flow, multi-phase physics and high temperature material behavior. Visualizing and modeling these events is crucial to both fundamental science as well as applications in protection materials and planetary science. Researchers across academia, government and industry are invited to present their work related to the modeling or experimental investigation of hypervelocity impact or impact related phenomena
Learning, Uncertainty, and Materials
Organizers: Dr. Jaroslaw Knap (U.S. Army Research Laboratory), Prof. Petr Plechac (University of Delaware), Prof. Gideon Simpson, (Drexel University), Dr. Ting Wang (U.S. Army Research Laboratory)
Summary: As we have entered the “big data” era, opportunities have arisen to employ new, contemporary, machine learning techniques to better model materials and their properties. This has yielded models with greater predictive capabilities over traditional parametric models. At the same time, there has been increased interest in quantifying model predictions, in particular under extreme loading conditions. This is of relevance to machine learning methods where data may be noisy or, in certain regimes, sparse. In this session, novel work will be presented hybridizing machine learning with uncertainty quantification with applications to materials. This includes both understanding uncertainty propagation for machine learning models and using machine learning to better quantify uncertainty propagation of stochastic models
Mechanics and Manufacturing of Architected Materials
Organizers: Prof. Stavros Gaitanaros (Johns Hopkins University), Prof. Jamie Guest (Johns Hopkins University), Prof. Jochen Mueller (Johns Hopkins University)
Summary: Architected materials combine topology and mesoscale morphological features to reach combinations of mechanical, acoustic, and thermal properties that are unattainable by traditional monolithic solids. Material systems such as cellular solids, micro-and nano-lattices, and multi-phase composites, have the potential to transform the way modern engineering structures are designed and manufactured, with applications ranging from space structures and impact mitigation, to biomedical implants and energy storage devices. This symposium will discuss the latest advances on architected materials.
Topics of interest include, but are not limited to:
Mechanics of Biological and Biomimetic Soft Materials
Organizers: Prof. Kshitiz Upadhyay (Louisiana State University), Dr. Amy Dagro (U.S. Army Research Laboratory), Prof. Reuben Kraft (Pennsylvania State University)
Summary: Biological and biomimetic soft materials such as tissues, hydrogels and elastomers exhibit complex mechanical features, including low strength and large deformations, stress-strain nonlinearity, material heterogeneity, anisotropy, and time-dependence. This type of complex material response leads to unique challenges in their experimental characterization and modeling. This symposium intends to foster exchange of ideas between researchers in the fields of experimental and computational mechanics, materials science, instrumentation and sensing, and biology and medicine, who are involved in the research and analysis of the mechanical deformation, damage and failure of biological and biomimetic soft materials at all length (e.g., molecular to continuum-level) and time scales (quasi-static to high strain rate).
Examples of relevant subjects include, but are not limited to:
Modeling Heterogeneous Composites Across Length Scales
Organizers: Sakshi Braroo (Johns Hopkins University), Prof. Kedar Kirane (Stony Brook University), Dr. Christopher Meyer (U.S. Army Research Laboratory)
Summary: Composite materials are multi-constituent materials, composed of structural elements at multiple length scales. Due to their heterogeneous and multi-scale architecture, they are characterized by complex fracture mechanisms. The mechanical response and damage behavior at higher length scales are governed by complex processes and interactions at lower length scales. Thus, analysis, design, and evaluation of these materials benefit from a multiscale approach to modeling and experiments to capture behavior resulting from structures at multiple scales. This symposium is focused on studies of mechanical and damage response of composites and their constituents with emphasis on modeling composites and their constituents at any length scale from the atomic scale through the continuum scale and including novel multiscale modeling methods that bridge the gap between structural levels. Of interest are models and experiments investigating interface/interphase, meso-and micromechanical behavior, homogenization, atomistic to continuum scale modeling, multiscale modeling of damage and fracture, and novel approaches to coupling of length scales. Fracture behaviors of interest span from quasistatic to dynamic, fatigue, creep. Issues underlying the meaningful calibration, verification and validation of these models are welcomed and so are novel experimental techniques to characterize fracture mechanisms in composites.
Multi-scale Modeling, Characterization, Processing, and Performance of UHMWPE Fibers and their Composite Laminates
Organizers: Prof. Bazle Z. Haque (University of Delaware), Dr. Sanjib C. Chowdhury (University of Delaware), Dr. Chris Meyer (U.S. Army Research Laboratory), Dr. Mike Yeager (U.S. Army Research Laboratory), Prof. Joseph Deitzel (University of Delaware), Prof. John W. Gillespie Jr. (University of Delaware)
Summary: This session is seeking abstracts on ultra-high molecular weight polyethylene (UHMWPE) fibers and their composites.
Topics include (but not limited to):
Slip, Twins and Voids
Organizers: Dr. Suhas Eswarappa Prameela (MIT), Prof. Burigede Liu (Cambridge University), Prof. Xingsheng Sun (University of Kentucky), Sreenivas Raguraman (Johns Hopkins University), Dr. Debjoy Mallick (U.S. Army Research Laboratory)
Summary: The symposium offers a chance for researchers working on a range of materials, from ceramics or metals to amorphous solids to present their research work. Our symposium draws attention to the role of materials science and mechanics aspects in determining the performance or properties of materials. This is done through the viewpoint of one or combination of slip, twins, and voids. We invite researchers from experimental and computational areas working in these topics to submit abstracts.
Systems for Fitting, Uncertainty Quantification, Selection and Use of Interatomic Models *tutorial
Organizers: Prof. Ellad Tadmor (University of Minnesota), Dr. Ilia Nikiforov (University of Minnesota)
Summary: Atomistic (nano- and multi-scale) simulations in engineering and materials science play a key role in realistic scientific and industrial applications. These approaches frequently use empirical interatomic models (IMs) to represent the response of the material. This session will focus on recent advancements in classical molecular simulations using IMs, with an emphasis on systematic approaches to model development, selection, and use.
Topics may include:
The session will also include a hands-on tutorial on demonstrating the utility of the OpenKIM (https://openkim.org) infrastructure for practical materials simulations.
Attendees will learn:
Understanding sub-shock impacts on energetic materials: theory and experiment
Organizers: Dr. Marc Cawkwell (Los Alamos National Laboratory), Dr. Milovan Zecevic (Los Alamos National Laboratory)
Summary: It is well known that weak, sub-shock impacts on energetic materials can give rise to violent reactions. Several empirical, small-scale tests have been developed that assess the response of explosives to weak impacts in order to rank energetic materials by their potential for accidental initiation. However, despite the critical importance to safety,the mechanisms through which the high temperatures needed for the initiation of chemical reactions are generated under weak impacts are not known with precision. We therefore seek contributions that address i) new experimental techniques and ii)mesoscale simulations for quantifying localized deformation, temperature evolution, and/or the conditions required for the onset of violent reactions in energetic materials under the sub-shock loading conditions relevant to handling safety.