What is the latest papers for material models of frp composite lamina ?5 answersNew energy-based theoretical models for predicting the ballistic behavior of thin and thick woven composite laminates have been presented by Leonardo Jose et al.. These models are formulated for high-velocity impacts and are based on the energy contribution of different energy-absorption mechanisms. Additionally, a 3D finite element model is developed to simulate the performance of the laminate under high-velocity impacts and validate the hypotheses of the theoretical models.A surrogate model based on a limited number of experimental finite element analysis (FEA) data points has been developed by Sadik L. Omairey et al.. This model efficiently estimates stiffness properties of unidirectional composite laminas while accounting for geometric and material property uncertainties. It significantly decreases analysis duration compared to FEA techniques and accurately represents a wide range of uncertainties.Lei Wan et al. have assessed three different particle-based approaches for 3D modeling of fiber-reinforced polymer (FRP) composite laminates with anisotropic elasticity. The Extended 2D Hexagonal and Square Packing model in the Discrete Element Method (DEM) was found to be capable of modeling 3D composite laminates with better efficiency. Good agreements between DEM, Finite Element, and theoretical results were observed, demonstrating the capability of the developed DEM approach for modeling the elastic behavior of general FRP composite lamina and laminates.Seyed Saeid Rahimian Koloor et al. propose a new method to identify the yield point of multidirectional (MD) fiber-reinforced polymer (FRP) composite structures based on the evolution of the damage dissipation energy (DDE). The yield point is identified to correspond to a 5% increase in the initial slope of the DDE evolution curve. The new energy concept provides a significantly larger safe limit of yield for MD composite structures compared to unidirectional (UD) criteria.Jerzy Marszałek et al. present an original mesoscale finite element model of unidirectional polymer matrix laminate. The model takes into account the internal structure of the laminate and was developed for predicting the mechanical behavior and damage response of composite laminates tested in three-point bending tests. The computational results showed good agreement with experimental data.
What is the purpose of biomechanical modelling?5 answersBiomechanical modelling is used for various purposes. It can be used to predict the behavior of structures, providing a physics-based extrapolation, not just geometric, in areas where there is limited or no intraoperative data available. Biomechanical models can also be used to assist in the development of methods, algorithms, and systems in biosignal processing. In the context of foot ulcers in persons with diabetes, a biomechanical foot model coupled with a pressure sensor can be used to estimate tissue strains and determine if they can cause ulcer formation. In the field of nanomedicine, biomechanical modelling plays a key role in enabling the translation of patient-specific treatments and effective therapies to clinical practice. Biomechanical models are also important in the improvement and understanding of submodels in the global food production system, such as food animal production.
How can a strain rate dependent damage model be used to evaluate the dynamic response of CFRTP laminates?5 answersA strain rate dependent damage model can be used to evaluate the dynamic response of CFRP laminates by considering the effect of strain rate on the failure process and damage evolution. This model consists of three parts: a modified stress-strain relationship for composites under dynamic stress states, a strain-rate-dependent progressive damage model to evaluate intra-laminar damage, and a cohesive zone model to examine inter-laminar delamination. By incorporating the strain rate effect, the model can accurately capture the failure process of composite laminates under low velocity impact (LVI). Experimental validation of the model has shown that the numerical results are highly consistent with the experimental outcomes, with the contact force history curves, intra- and inter-laminar damage evolution process being strain rate dependent. This strain rate dependent damage model is crucial for accurately predicting the dynamic stress state and damage evolution of CFRP laminates under LVI, especially for high impact energies.
How can micro mechanical modeling be used to sandwich laminates?5 answersMicro-mechanical modeling can be used to predict the partially debonding and progressive damage in composite laminates. The modeling approach involves the use of cohesive zone models (CZM) to represent the interphase between different layers of the laminate. The modeling also takes into account the failure mechanisms of the interphase, such as interfacial cracking and delamination. The numerical simulations provide insights into the residual stress concentration and cracking areas in the laminates. Additionally, the modeling can be used to study the mechanical behavior of laminates with micro-cracks and determine the effective elastic moduli and Poisson's ratio. Overall, micro-mechanical modeling allows for a better understanding of the damage progression and mechanical properties of composite laminates, which can be valuable for designing and optimizing sandwich structures.
How can micro modeling be used to study the mechanical properties of sandwich laminates?5 answersMicro modeling can be used to study the mechanical properties of sandwich laminates by employing various techniques. One approach is the use of a novel micro-mechanical modeling approach that predicts the partially debonding of Z-pin reinforced composite laminates after the cure process. This approach utilizes a cohesive zone model (CZM) to represent the interphase between the Z-pin and resin, and combines quadratic stress and Benzeggagh-Kenane propagation criteria to determine the failure mechanism of the interphase. Another method involves the analysis of sandwich composites with a three-layer structure, consisting of upper and lower composite layers and a core layer. By systematically investigating the mechanical properties and microstructure, the effects of different layers and materials on the sandwich composites can be evaluated. These micro modeling techniques provide insights into the behavior and performance of sandwich laminates, enabling the optimization of their mechanical properties for various applications.
Can you introduce a recent review paper on constitutive modeling of damage in composite materials?4 answersRecent research has focused on developing constitutive models to accurately predict damage in composite materials. Liu et al. proposed a bond-based peridynamic (BB-PD) model with plastic hardening for fiber-reinforced polymer composites, which successfully simulated the damage behaviors of laminated composites subjected to impact loading. Another study by jackzballor developed a theoretical framework for fully coupled stress distribution, gas diffusion, heat conduction, and damage evolution in composites, providing insights into the damage mechanisms in extreme environments. Abu-Farsakh and Odeh proposed a combined damage-based failure criterion for predicting failure stresses in fibrous composite laminates, which showed good agreement with experimental data. Hasanyan and Pellegrino developed a finite element model with progressive damage to predict failure modes in ultra-thin laminates, which was validated through experiments. Kurumatani et al. proposed a new damage model for simulating cohesive fracture behavior in multi-phase composite materials, allowing for meshless finite element analysis of cohesive fracturing. These studies provide valuable insights into the constitutive modeling of damage in composite materials.