Jose Reinoso

Universidad de Sevilla | US

The codes presented here are used for the paper titled "A Phase-Field Fracture Model for Fatigue using Locking-Free Solid Shell Finite Elements: Analysis for Homogeneous and Layered Composites". These codes are applicable with or without fatigue considerations and are written as UEL and UMAT subroutines for use in Abaqus. We have tested the files f...

The present work is devoted to prove that unstable crack propagation events do not comply with quasi-static hypotheses and thus should be modelled by dynamic approaches. Comprehensive supporting evidence is provided on the basis of three different analyses conducted on multi-ligament unstable fracture conditions, including a simplified Spring-Mass...

Indentation tests are largely exploited in experiments to characterize the mechanical and fracture properties of the materials from the resulting crack patterns. This work proposes an efficient theoretical and computational framework, whose implementation is detailed for 2D axisymmetric and 3D geometries, to simulate indentation-induced cracking ph...

The phenomenon of brittle crack onset stemming from a circular hole in an infinite plate subjected to remote biaxial loading is herein investigated. A thorough analysis on the influence of the loading biaxiality reveals the existence of a wide casuistry in the sign and trend distributions of the stress field and Stress Intensity Factor, thus render...

Soft materials are of major interest for biomechanics applications due to their high deformability and susceptibility to experience damage events under different loading scenarios. The present study is concerned with modelling damage evolution processes in these nonlinear materials whose structural responses are prone to locking when low-order kine...

The helical stability experienced by elastic cylinders is investigated using numerical methods. A doubly fiber-reinforced incompressible nonlinear elastic tube subject to axial loading, internal pressure and twist is examined using a numerical scheme based on the modified Riks (quasi-static) procedure. Under the application of such loadings (qualit...

Achieving sustainable development education is one of the challenges proposed to reach many countries by 2030, based on SDG4 [1] A case of interest is teaching for development of energy sustainability in educational institutions [2], where student learning was enhanced with demonstrative didactic prototypes. The development project of linkage with...

The variational approach to brittle fracture is herein extended to deal with the simultaneous interplay of two failure mechanisms affecting grained heterogeneous materials in compression, namely fracture in tension and crushing in compression. The problem is addressed within the context of a multi-phase field variational approach, with two independ...

Designing an airframe is a complex process as it requires knowledge from multiple disciplines such as aerodynamics, structural mechanics, manufacturing, flight dynamics, which individually lead to very different optimal designs. Furthermore, the growing use of Carbon Fibre Reinforced Plastics (CFRP), while allowing for more design freedom, has at t...

In this investigation, the mechanical modeling of nonlinear visco-hyperelastic residually stressed materials obtained from an invariant-based constitutive energy framework is coupled with the phase field approach to fracture. The main target regards the extension of the phase field method to simulate pre-stressed cylindrical structures subjected to...

To efficiently predict the crack propagation in thin-walled structures, a global–local approach for phase field modeling using large-deformation solid shell finite elements considering the enhanced assumed strain (EAS) and the assumed natural strain (ANS) methods for the alleviation of locking effects is developed in this work. Aiming at tackling t...

The hemp flower has gained relevance in the agroindustrial and medical field worldwide due to the analgesic, antiinflammatory, and antiepileptic benefits that cannabidiol offers. A critical process in post-harvest is drying, as this allows to maintain the intrinsic properties of the flower. This operation requires a constant heat supply that involv...

A three-dimensional hygro-thermo-mechanical computational framework for the photovoltaic (PV) laminates as well as its numerical implementation is established in this work. Aiming at the efficient thermo-mechanical modeling of the thin-walled structures with polymeric interfaces, the solid shell element, which incorporates the enhanced assumed stra...

This work experimentally analyzes the influence of the printing direction on the fracture resistance capabilities of composite specimens incorporating structured interfaces in their geometrical definition. In particular, we compare horizontal and vertical direction fibre deposition using 3D printing capabilities in order to identify the best scenar...

We present a combined phase field and cohesive zone formulation for hydrogen embrittlement that resolves the polycrystalline microstructure of metals. Unlike previous studies, our deformation-diffusion-fracture modelling framework accounts for hydrogen-microstructure interactions and explicitly captures the interplay between bulk (transgranular) fr...

We present a combined phase field and cohesive zone formulation for hydrogen embrittlement that resolves the polycrystalline microstructure of metals. Unlike previous studies, our deformation-diffusion-fracture modelling framework accounts for hydrogen-microstructure interactions and explicitly captures the interplay between bulk (transgranular) fr...

Thermo-elastic fracture is a matter of important concern for thin-walled structures made of functionally graded materials (FGMs). Based on this practical relevance, a thermodynamically consistent framework is proposed in this investigation for solving the coupled thermo-mechanical phase-field fracture problem in thin-walled structures made of FGMs....

The analysis of fracture phenomena of thin-walled structures has been a matter of intensive research in the last decades. These phenomena notably restrict the applicability of slender structures, especially under the influence of temperature. With the aim of achieving a reliable prediction of temperature-driven failures in thin-walled structures, t...

In this work, a thermodynamically consistent framework for coupled thermo-mechanical simulations for thin-walled structures with the presence of cohesive interfaces is proposed. Regarding the shell formulation, a solid shell parametrization scheme is adopted, which is equipped with the mixed Enhanced Assumed Strain (EAS) method to alleviate Poisson...

The development of new high-tech products often requires the optimization of structural components having layer-based arrangements. The primary focus of the present study is the analysis of the failure mechanisms that may occur in thin layer-flexible substrate systems: crack propagation through the layers, delamination at interfaces, and mixed-mode...

Robust numerical prediction of crack propagation in heterogeneous media has been a matter of relevant importance in many engineering applications. In this study, a modelling framework for triggering dynamic fracture events in heterogeneous media, like layered materials, with internal finite thickness cohesive interfaces is proposed through the expl...

This paper presents the extension and validation of omni-failure envelopes for first-ply failure (FPF) and last-ply failure (LPF) analysis of advanced composite materials under general three-dimensional (3D) stress states. Phenomenological failure criteria based on invariant structural tensors are implemented to address failure events in multidirec...

This review article provides an outlook over the pioneering contributions by Peter Wriggers in the field of computational contact mechanics that have inspired the development of new computational methods for tribology. The first development concerns with methods to efficiently account for any real roughness or texture in the finite element discreti...

In the Phase Field methodology there is a length parameter related to the size of the damage region, which is proportional to the Irwin length. In this work, we apply the Phase Field methodology to the analysis of fracture at the micro-scale in brittle materials, studying the role of this length parameter when the size of the specimen is of the ord...

Delamination and cracking of matrix/fiber is a common failure phenomena reported in fiber reinforced compos- ite. As complex stress states develop in laminated structures, they are prone to fractures. Therefore, designs with large damage tolerance are currently implemented in most of the industrial sectors. This can be achieved by designing the com...

An extension to the interface finite element with eMbedded Profile for Joint Roughness (MPJR interface finite element) is herein proposed for solving the frictional contact problem between a rigid indenter of any complex shape and an elastic body under generic oblique load histories. The actual shape of the indenter is accounted for as a correction...

A comparison of the interface fracture energy in the adhesive joints PMMA/PMMA bonded by epoxy and PMMA/epoxy is presented. The work focuses on the question of how similar is the fracture energy in these joints, including its dependence on the fracture mode mixity. Series of tests for Brazilian disk specimens subjected to compressive loading were c...

It is well known that humidity and temperature greatly influence the degradation of interfacial adhesion in photovoltaic (PV) modules. Besides, for accurate prediction of the required energy to peel off the different plies of end-of-life PV for recycling, it is also essential to take these factors into account. In this work, a polynomial cohesive z...

An extension to the interface finite element with eMbedded Profile for Joint Roughness (MPJR interface finite element) is herein proposed for solving the frictional contact problem between a rigid indenter of any complex shape and an elastic body under generic oblique load histories. The actual shape of the indenter is accounted for as a correction...

Failure processes in Laminated Fiber-Reinforced Composites (LFRCs) entail the development and progression of different physical mechanisms and, in particular, the interaction between inter-laminar and intra-laminar cracking. Reliable modeling of such complex scenarios can be achieved by developing robust numerical predictive tools that allow for th...

In this investigation, the mechanical modelling of a hyperelastic residually stressed thick-walled circular cylindrical tube under inflation and extension is performed from a numerical standpoint. The constitutive relation is derived for residually stressed solids using an invariant-based free energy approach. A three-dimensional residual stress fi...

The damage and fracture behavior of Fiber Reinforced Polymers (FRPs) is quite complex and is different than the failure behavior of the traditionally employed metals. There are various types of failure mechanisms that can develop during the service life of composite structures. Each of these mechanisms can initiate and propagate independently. Howe...

The damage and fracture behavior of Fiber Reinforced Polymers (FRPs) is quite complex and is different than the failure behavior of the traditionally employed metals. There are various types of failure mechanisms that can develop during the service life of composite structures. Each of these mechanisms can initiate and propagate independently. Howe...

The paper presents the localized bifurcation abnormal enlargement associated with certain human diseases such as abdominal aortic aneurysms (AAA), among others. The constitutive framework herewith proposed is constructed relying on the modelling of non-linear elastic materials under the action of residual stresses. The suitable incorporation on the...

A phase field (PF) approximation of fracture for functionally graded materials (FGM) using a diffusive crack approach incorporating the characteristic length scale as a material parameter is herein proposed. A rule of mixture is employed to estimate the material properties, according to the volume fractions of the constituent materials, which have...

Phase-Field (PF) methods of fracture have emerged as powerful modeling tools for triggering fracture events in solids. These numerical techniques efficiently alleviate mesh dependent pathologies and are very suitable for characterizing brittle as well as quasi-brittle fracture in a wide range of engineering materials and structures including fiber...

Phase-field (PF) methods applied to fracture have become attractive and efficient modeling tools to solve complex problems of triggering cracking events in solids from a different signature. These numerical techniques have significantly mitigated the mesh-dependent pathology and are widely applied to brittle, ductile, and even models involving plas...

The phenomenon of arrest of an unstably-growing crack due to a curved weak interface is investigated. The weak interface can produce the deviation of the crack path, trapping the crack at the interface, leading to stable crack growth for certain interface geometries. This idea could be used as a technical solution for a new type of crack arrester,...

Interface cracking is one of the most prominent failure modes in fibre reinforced polymer (FRP) composites. Recent trends in high-tech applications of FRP composites exploit the limits of the load bearing capacity, generally encompassing the development of notable nonlinear effects from geometrical and material signatures. In this investigation, we...

The phase field (PF) approach to fracture has emerged as a promising modeling tool that regularizes the variational fracture theory by Griffith via the introduction of a coupled nonlocal damage-like field. In this work, we outline a PF formulation for triggering brittle fracture phenomena in shell structures made of Functionally Graded Materials (F...

In the present work, the evolution of damage in periodic composite materials is investigated through a novel finite element-based multiscale computational approach. The proposed methodology is developed by means of the original combination of asymptotic homogenization with the phase field approach to nonlocal damage. This last is applied at the mac...

Transverse intralaminar cracks in layers with perpendicular orientation referred to the main loading direction have a significant affection on the apparent ultimate strength of the corresponding composite laminate. This effect stems from the fact that such transverse cracks generally promote the occurrence of other failure mechanisms leading to the...

In this study, a novel procedure enabling the computation of the relative displacements (normal δn, shear δss and in-plane δsl) that are needed to evaluate a traction-separation law (TSL) under finite displacement and rotation hypotheses within the framework of interface modelling is investigated. This kind of procedure is required when rigid body...

Interface cracking is one of the most prominent failure modes in fibre reinforced polymer (FRP) composites. Recent trends in high-tech applications of FRP composites exploit the limits of the load bearing capacity, generally encompassing the development of notable nonlinear effects from geometrical and material signatures. In this investigation, we...

Fracture events in short fibre reinforced polymer (SFRP) composites are one of the most limiting phenomena for their widespread use in many engineering applications, especially involving lightweight structures. In this investigation, a novel phase field model that accounts for the anisotropic response of SFRPs is outlined from the theoretical and n...

This chapter provides a self-consistent introduction to computational methods for the solution of contact problems between bodies separated by rough interfaces. Both frictional and frictionless contact problems are examined. The mathematical formulation of the boundary element method is presented first, with details on the possible algorithmic impl...

The progressive damage analysis of fiber-reinforced composite materials is a challenging task, especially when complicated cracking scenarios arise due to the onset and progression of several damage mechanisms. From a modeling point of view, a particularly complex failure scenario is the interaction between intralaminar and interlaminar cracks. Thi...

The nature of failure in long fiber-reinforced composites is strongly affected by damage at the micro-scale. The presence of different phases at different length scales leads to a significant complexity in the failure progression. At the micro-scale, the complexity is due to the presence of different points of initiation for damage and the presence...

The phenomenon of arrest of an unstably-growing crack due to a curved weak interface is investigated. The weak interface can produce the deviation of the crack path, trapping the crack at the interface, leading to stable crack growth for certain interface geometries. This evidence could be exploited as a technical solution for a new type of crack a...

In this paper, we propose a novel phenomenological constitutive modeling framework which enables incorporating damage and residually stress capabilities for solids. In particular, a non-local gradient-enhanced damage model has been formulated using the Internal State Variables (ISV) approach in the finite strain setting with the preclusion of mesh...

In the present work, the evolution of damage in periodic composite materials is investigated through a novel finite element-based multiscale computational approach. The methodology is developed by means of the original combination of homogenization methods with the phase field approach of fracture. This last is applied at the macroscale level on th...

In the present investigation, a J-Integral formulation for non-flat crack paths, in the framework of the cohesive zone model, is developed. The formulation allows fracture energy properties in a direction that is not necessarily coplanar with the global crack advance to be analysed. Specifically, the effective fracture energy, [Formula: see text],...

A numerical procedure to analyze bifurcation and post-bifurcation of a finite deformation boundary-value problem for a residually-stressed elastic body is studied. In particular, the problem is the combined extension and inflation of a circular cylindrical tube subject to radial and circumferential residual stresses. The material model, given by a...

The computational modelling of fiber-reinforced structures is of prime importance for automotive products such as tires, airsprings or hoses and for biomechanical applications as is the case of arteries. In the first part of the paper, we outline the development of invariant-based constitutive models suitable for fiber-reinforced materials within t...

In this work, the phase field (PF) approach for brittle fracture in the bulk coupled with the cohesive zone model (CZM) for pre-existing interfaces is exploited for the simulation of fracture of thin films on compliant substrates, which are structural configurations of extensive use in many engineering systems such as protecting layers for vessels,...

Interface models for triggering damage events have been extensively used in many engineering applications due to their inherent versatility and relatively simple numerical implementations. Usually, the non-linear behavior of interfaces and thin adhesive joints between solids has been modeled using Cohesive Zone Models (CZMs) although other alternat...

Rock fracture in geo-materials is a complex phenomenon due to its intrinsic characteristics and the potential external loading conditions. As a result, these materials can experience intricate fracture patterns endowing various cracking phenomena such as: branching, coalescence, shielding, and amplification, among many others. In this article, we p...

The development of predictive numerical methods, which accurately represent the progressive failure of long fiber composite materials, is nowadays required for the achievement of optimized mechanical responses in terms of load bearing capacities of modern composite structures. In this investigation, two characteristic failure mechanisms of long fib...

The problem of adhesive wear is herein investigated in relation to periodic asperity junction models in the framework of the Archard interpretation suggesting that wear debris formation is the result of asperity fracture. To this aim, the phase field model for fracture is exploited to simulate the crack pattern leading to debris formation in the as...

This article presents a novel three-dimensional constitutive modeling framework for residually stressed viscoelastic solids undergoing finite strains. Within the current of phenomenological approach, the constitutive relations are derived for a viscoelastic matrix whereas residual stresses are considered in the constitutive law in terms of a set of...

The advances in manufacturing techniques allow the generation of new geometric conceptions and open a new paradigm in adhesive joints design. Structured interfaces constitute an excellent method to improve the resistance properties of these kinds of joining systems, Additive Layer Manufacturing (ALM or 3D printing) being an appropriate procedure to...

Recent advancements on the variational approach to fracture for the prediction of complex crack patterns in heterogeneous materials and composite structures is herein proposed, as a result of the frontier research activities undertaken in the FP7 ERC Starting Grant project CA2PVM which focuses on the development of computational methods for the dur...