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Journal articles on the topic 'Quasi-static crack evolution'

Author: Grafiati

Published: 14 March 2023

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1

NEGRI, MATTEO, and CHRISTOPH ORTNER. "QUASI-STATIC CRACK PROPAGATION BY GRIFFITH'S CRITERION." Mathematical Models and Methods in Applied Sciences 18, no. 11 (2008): 1895–925. http://dx.doi.org/10.1142/s0218202508003236.

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We consider the propagation of a crack in a brittle material along a prescribed crack path and define a quasi-static evolution by means of stationary points of the free energy. We show that this evolution satisfies Griffith's criterion in a suitable form which takes into account both stable and unstable propagations, as well as an energy balance formula which accounts for dissipation in the unstable regime. If the load is monotonically increasing, this solution is explicit and almost everywhere unique. For more general loads we construct a solution via time discretization. Finally, we consider

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2

Hentati, Hamdi, Radhi Abdelmoula, Aref Maalej, and Khalil Maalej. "Quasi Static Analysis of Anti-Plane Shear Crack." Applied Mechanics and Materials 232 (November 2012): 92–96. http://dx.doi.org/10.4028/www.scientific.net/amm.232.92.

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Fracture mechanics has been revisited by proposing different models of quasi static brittle fracture. In this work, the problem of the quasi static crack propagation is based on variational approach. It requires no prior knowledge of the crack path or of its topology. Moreover, it is capable of modeling crack initiation. In the numerical experiments, we use a standard linear (P1) Lagrange finite element method for discretization. We perform numerical simulations of a piece of brittle material without initial crack. An alternate minimizations algorithm is used. Based on these numerical results,

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3

Almi, Stefano. "Quasi-static hydraulic crack growth driven by Darcy’s law." Advances in Calculus of Variations 11, no. 2 (2018): 161–91. http://dx.doi.org/10.1515/acv-2016-0029.

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AbstractIn the framework of rate independent processes, we present a variational model of quasi-static crack growth in hydraulic fracture. We first introduce the energy functional and study the equilibrium conditions of an unbounded linearly elastic body subject to a remote strain {\epsilon\in\mathbb{R}} and with a sufficiently regular crack Γ filled by a volume V of incompressible fluid. In particular, we are able to find the pressure p of the fluid inside the crack as a function of Γ, V, and ϵ. Then we study the problem of quasi-static evolution for our model, imposing that the fluid volume

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4

Negri, Matteo, and Rodica Toader. "Scaling in fracture mechanics by Bažant law: From finite to linearized elasticity." Mathematical Models and Methods in Applied Sciences 25, no. 07 (2015): 1389–420. http://dx.doi.org/10.1142/s0218202515500360.

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We consider crack propagation in brittle nonlinear elastic materials in the context of quasi-static evolutions of energetic type. Given a sequence of self-similar domains nΩ on which the imposed boundary conditions scale according to Bažant's law, we show, in agreement with several experimental data, that the corresponding sequence of evolutions converges (for n → ∞) to the evolution of a crack in a brittle linear-elastic material.

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5

Maso, Gianni Dal, and Chiara Zanini. "Quasi-static crack growth for a cohesive zone model with prescribed crack path." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 137, no. 2 (2007): 253–79. http://dx.doi.org/10.1017/s030821050500079x.

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In this paper we study the quasi-static crack growth for a cohesive zone model. We assume that the crack path is prescribed and we study the time evolution of the crack in the framework of the variational theory of rate-independent processes.

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6

Yasin Said, Mohamed, and Jianjun Chen. "Study on Defect Evolution of Steel Strip under High-speed Cold Rolling." Journal of Physics: Conference Series 2430, no. 1 (2023): 012023. http://dx.doi.org/10.1088/1742-6596/2430/1/012023.

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Abstract In this paper the strain rate effect of the material was quantitatively tested by INSTRON tensile testing machine and Zwick/Roell HTM5020 high-speed tensile testing machine. The dimple size of the fracture surface of the tensile specimen was determined and analyzed by using the scanning electron microscope. Based on the Cowper-Symonds constitutive model, the parameters in the dynamic constitutive model and the true stress-strain curve under quasi-static condition were obtained by combining the results of quasi-static and dynamic tensile tests and the finite element numerical analyses.

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J. Larsen, Christopher. "Local minimality and crack prediction in quasi-static Griffith fracture evolution." Discrete & Continuous Dynamical Systems - S 6, no. 1 (2013): 121–29. http://dx.doi.org/10.3934/dcdss.2013.6.121.

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8

Nifagin, V. A., and M. A. Gundina. "QUASISTATIC STATIONARY GROWTH OF ELASTOPLASTICAL CRACK." Vestnik of Samara University. Natural Science Series 20, no. 7 (2017): 85–95. http://dx.doi.org/10.18287/2541-7525-2014-20-7-85-95.

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The boundary value problem with relations to the theory of ﬂow with non- linear hardening in derivatives stress and strain tensors in the parameter loading is formulated to estimate local mechanical properties in the vicinity of crack tip of mode of loading for plane strain of elastic-plastic material at the stage of quasi-static growth. Complete solutions are obtained by the method of asymp- totic decompositions. The redistribution of stress and strain ﬁelds in the plastic region at quasi-static growing crack for the intermediate structure is investigat- ed. The form of plastic zones was foun

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9

Li, Ling, EA Flores-Johnson, Luming Shen, and Gwénaëlle Proust. "Effects of heat treatment and strain rate on the microstructure and mechanical properties of 6061 Al alloy." International Journal of Damage Mechanics 25, no. 1 (2015): 26–41. http://dx.doi.org/10.1177/1056789515569088.

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In the present work, the effects of heat treatment and strain rate on mechanical behaviour and microstructure evolution of aluminium alloy 6061 have been investigated. The micro-crack initiation and crystallographic texture evolution are obtained from scanning electron microscope and electron back-scatter diffraction experiments. Quasi-static and high strain rate compression tests are conducted on AA6061 specimens that underwent two different heat treatments: the as-received material with the original T6 heat treatment and the heat treated and artificially aged specimens. For the high strain r

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10

Nozères, Frédéric, Hervé Couque, Rémi Boulanger, Yann Quirion, Patrice Bailly, and Jérôme Limido. "Numerical modelling strategies using implicit and explicit methods to simulate quasi-static and dynamic three-points bend fracture tests of a ductile steel." EPJ Web of Conferences 250 (2021): 02033. http://dx.doi.org/10.1051/epjconf/202125002033.

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Three-point bend fracture tests have been conducted at different loading rates with a quadratic martensitic steel. The failure energy has been found to increase with loading rate. To get insights in this increase a numerical investigation has been undertaken with different strategies using ABAQUS and IMPETUS softwares in order to address quasi-static and dynamic loading conditions. Simulations were conducted with the ABAQUS software in order to carry out a comparative analysis of both implicit and explicit approaches. In addition to standard Finite Element Method (FEM) applied to quasi-static

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11

Sornette, D., and C. Vanneste. "Faults self-organized by repeated earthquakes in a quasi-static antiplane crack model." Nonlinear Processes in Geophysics 3, no. 1 (1996): 1–12. http://dx.doi.org/10.5194/npg-3-1-1996.

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Abstract. We study a 2D quasi-static discrete crack anti-plane model of a tectonic plate with long range elastic forces and quenched disorder. The plate is driven at its border and the load is transferred to all elements through elastic forces. This model can be considered as belonging to the class of self-organized models which may exhibit spontaneous criticality, with four additional ingredients compared to sandpile models, namely quenched disorder, boundary driving, long range forces and fast time crack rules. In this "crack" model, as in the "dislocation" version previously studied, we fin

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12

Purnomo and Putu Hadi Setyarini. "Fracture Propagation Pathways Pattern on UV-Irradiated Double-Edge Cracked of Mordenite Zeolite-HDPE Composites." Key Engineering Materials 851 (July 2020): 128–34. http://dx.doi.org/10.4028/www.scientific.net/kem.851.128.

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Mechanical failure of zeolite-high density polyethylene (HDPE) material applied to skull bone implants is a material fracture that cannot be controlled. An important step to minimize failure due to fracture is to understand the fracture characteristics indicated by the propagation path pattern. This study aimed to investigate the fracture propagation pathways of zeolite-HDPE composites in quasi-static conditions. UV-irradiated Double-edge cracked zeolite-HDPE composite was tested in mode I (a stress perpendicular to the plane of the crack) in a universal testing machine (UTM) with a crosshead

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13

Du, Wen Wen, Qian Wang, Deng Hui Zhao, and Lin Wang. "Study on the Evolution of Adiabatic Shear Band of a High Strength Steel." Applied Mechanics and Materials 782 (August 2015): 143–50. http://dx.doi.org/10.4028/www.scientific.net/amm.782.143.

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The evolution process of a high strength steel which subjected with three different heat treatment proceedings and gets different quasi-static tensile properties was investigated in this paper. To precisely control the plastic deformation of the cylinder and capture the development process of adiabatic shear bands, stopper ring was used in Split Hopkinson Pressure Bar (SHPB). Combining the stress-strain curves and microstructures after SHPB tests, the microstructure evolution from the nucleation of adiabatic shear bands to fracture of the cylindrical steel were observed. The experimental resul

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Neumeister, Peter, Hannes Kessler, and Herbert Balke. "Effect of switching stresses on domain evolution during quasi-static crack growth in a ferroelastic single crystal." Acta Materialia 58, no. 7 (2010): 2577–84. http://dx.doi.org/10.1016/j.actamat.2009.12.044.

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15

Hao, Qijun, Xiaohui Liu, Ankui Hu, Yu Zheng, and Xiaoping Zhao. "Research on Stress Threshold of Deep Buried Coal Rock under Quasi-Static Strain Rate Based on Acoustic Emission." Advances in Civil Engineering 2020 (September 21, 2020): 1–13. http://dx.doi.org/10.1155/2020/8893971.

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The deformation and failure process of coal rock under different strain rates is a significant challenge which must be solved in dynamic excavation. It is important to study the influence of strain rate on the evolution of coal rock crack. The triaxial compression tests and acoustic emission tests under the strain rate of 10−5 s−1 to 10−3 s−1 were conducted on coal rock using MTS 815 hydraulic servo-control testing machine. During the loading process, acoustic emission energy and spatial distribution have obvious stage characteristics. The damage variable is defined by acoustic emission energy

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16

Yun, Kumchol, Songhun Kwak, Zhenqing Wang, et al. "A Damage Model Reflecting the Interaction between Delamination and Intralaminar Crack for Failure Analysis of FRP Laminates." Applied Sciences 9, no. 2 (2019): 314. http://dx.doi.org/10.3390/app9020314.

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In this paper, a progressive damage model reflecting the interaction between delamination and intralaminar crack is developed to predict fracture behaviors and the ultimate load-bearing ability of the fiber-reinforced polymer laminates subject to quasi-static load. Initiation and evolution of intralaminar crack in composites are modeled using a continuum damage mechanics model, which has the capability to reliably predict the discrete crack direction by introducing the crack direction parameter while analyzing the multi-failure of FRP composites. Delamination is modeled using a cohesive zone m

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17

Zeng, Qing Na, Sheng Li Lv, Lei Jiang Yao, and Xiao Yan Tong. "Damage Mechanism of Plain Weave C/SiC Composites Subjected to Quasi-Static Indentation Loading." Advanced Materials Research 211-212 (February 2011): 217–21. http://dx.doi.org/10.4028/www.scientific.net/amr.211-212.217.

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Quasi-static indentation (QSI) tests on plain weave carbon fiber reinforced silicon carbide (C/SiC) ceramic matrix composites (CMC) have been performed to study the damage evolution law and damage modes. Acoustic emission (AE) and Ultrasonic C-scan techniques are creatively used to monitor the damage process and detect the indented damage, respectively. The damage development process could be described by three evidently different stages: initial crack tips spreading along within the matrix, matrix cracking and delamination as well as fiber bundles breakage of different layers. The AE activity

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18

Li, Hui, Cheng Chen, Tongguang Wang, and Long Wang. "Experimental Study of Stepped-Lap Scarf Joint Repair for Spar Cap Damage of Wind Turbine Blade in Service." Applied Sciences 10, no. 3 (2020): 922. http://dx.doi.org/10.3390/app10030922.

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The objective of this paper was to design configuration parameters for a stepped-lap scarf joint repair, which can be used for spar cap damage of a wind turbine blade in service and to realize the post-repair monitoring. Two experimental studies were included. First, tensile test for the unidirectional tape specimens with a large aspect ratio repaired using a multiple stepped-lap scarf joint method was carried out. The results showed that the reinforcement layer could effectively improve the load-carrying capacity of the repaired zone. The stepped-lap joint surface was identified as the weak p

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19

Vodička, R. "Applications of a phase-field fracture model to materials with inclusions." IOP Conference Series: Materials Science and Engineering 1252, no. 1 (2022): 012024. http://dx.doi.org/10.1088/1757-899x/1252/1/012024.

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Abstract Fracture in materials with inclusions is considered in the computational model of this contribution which allows prediction of crack propagation. The inclusions cause that cracks may appear inside the materials or along matrix-inclusion interfaces. The presented model can treat them both using two internal variables in a fashion of damage mechanics so that fracture is a consequence of the damage. The first variable is defined at the interface represented by a thin degradable adhesive layer so that an appropriate stress-strain relationship can be obtained as in cohesive zone models. Th

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20

Almi, Stefano. "Energy release rate and quasi-static evolution via vanishing viscosity in a fracture model depending on the crack opening." ESAIM: Control, Optimisation and Calculus of Variations 23, no. 3 (2017): 791–826. http://dx.doi.org/10.1051/cocv/2016014.

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21

Schreiber, Christoph, Charlotte Kuhn, Ralf Müller, and Tarek Zohdi. "A phase field modeling approach of cyclic fatigue crack growth." International Journal of Fracture 225, no. 1 (2020): 89–100. http://dx.doi.org/10.1007/s10704-020-00468-w.

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AbstractPhase field modeling of fracture has been in the focus of research for over a decade now. The field has gained attention properly due to its benefiting features for the numerical simulations even for complex crack problems. The framework was so far applied to quasi static and dynamic fracture for brittle as well as for ductile materials with isotropic and also with anisotropic fracture resistance. However, fracture due to cyclic mechanical fatigue, which is a very important phenomenon regarding a safe, durable and also economical design of structures, is considered only recently in ter

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22

Pham, Kim, Hanen Amor, Jean-Jacques Marigo, and Corrado Maurini. "Gradient Damage Models and Their Use to Approximate Brittle Fracture." International Journal of Damage Mechanics 20, no. 4 (2010): 618–52. http://dx.doi.org/10.1177/1056789510386852.

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In its numerical implementation, the variational approach to brittle fracture approximates the crack evolution in an elastic solid through the use of gradient damage models. In this article, we first formulate the quasi-static evolution problem for a general class of such damage models. Then, we introduce a stability criterion in terms of the positivity of the second derivative of the total energy under the unilateral constraint induced by the irreversibility of damage. These concepts are applied in the particular setting of a one-dimensional traction test. We construct homogeneous as well as

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23

Zhang, Yan-nan, Wei Zhou, and Peng-fei Zhang. "Quasi-static indentation damage and residual compressive failure analysis of carbon fiber composites using acoustic emission and micro-computed tomography." Journal of Composite Materials 54, no. 2 (2019): 229–42. http://dx.doi.org/10.1177/0021998319861140.

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In present research, the internal damage evolution and failure characteristics of carbon fiber woven composites under indentation and residual compressive loads were studied by using acoustic emission technology and X-ray micro-computed tomography. Real-time acoustic emission signals originating from internal damage of composites under applied loads were obtained and analyzed by the k-means clustering algorithm. Moreover, the internal damage characteristics were observed by the reconstructed three-dimensional model and the slice images of composite specimens. The results showed that the higher

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Han, Jike, Bo Yin, Michael Kaliske, and Kenjiro Tarada. "Incorporation of gradient-enhanced microplane damage model into isogeometric analysis." Engineering Computations 38, no. 8 (2021): 3388–415. http://dx.doi.org/10.1108/ec-08-2020-0455.

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Purpose This study aims to develop a new analysis approach devised by incorporating a gradient-enhanced microplane damage model (GeMpDM) into isogeometric analysis (IGA), which shows computational stability and capability in accurately predicting crack propagations in structures with complex geometries. Design/methodology/approach For the non-local microplane damage modeling, the maximum modified von-Mises equivalent strain among all microplanes is regularized as a representative quantity. This characterization implies that only one additional governing equation is considered, which improves c

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25

Jen, Yi-Ming, and Yu-Ching Huang. "Improvement in Tensile Quasi-Static and Fatigue Properties of Carbon Fiber-Reinforced Epoxy Laminates with Matrices Modified by Carbon Nanotubes and Graphene Nanoplatelets Hybrid Nanofillers." Nanomaterials 11, no. 12 (2021): 3459. http://dx.doi.org/10.3390/nano11123459.

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The monotonic and cyclic properties of carbon fiber-reinforced epoxy (CFEP) laminate specimens with matrices modified by multiwalled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) were experimentally studied. The laminate specimens were fabricated by the hand lay-up procedure and six MWCNT:GNP weight ratios, i.e., 0:0, 10:0, 0:10, 5:5, 9:1, and 1:9, were considered to prepare the nanoparticle-modified epoxy resin by using an ultrasonic homogenizer and a planetary centrifugal mixer. Then, these laminate specimens with their matrices modified under various nanofiller ratios were emp

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Madivala, Manjunatha, Alexander Schwedt, Ulrich Prahl, and Wolfgang Bleck. "Strain Hardening, Damage and Fracture Behavior of Al-Added High Mn TWIP Steels." Metals 9, no. 3 (2019): 367. http://dx.doi.org/10.3390/met9030367.

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The strain hardening and damage behavior of Al-added twinning induced plasticity (TWIP) steels were investigated. The study was focused on comparing two different alloying concepts by varying C and Mn contents with stacking fault energy (SFE) values of 24 mJ/m 2 and 29 mJ/m 2 . The evolution of microstructure, deformation mechanisms and micro-cracks development with increasing deformation was analyzed. Al-addition has led to the decrease of C diffusivity and reduction in tendency for Mn-C short-range ordering resulting in the suppression of serrated flow caused due to dynamic strain aging (DSA

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27

Xie, Yi, Jianxi Ren, Tailang Caoxi, Xu Chen, and Mengchen Yun. "Triaxial Compression Fracture Characteristics and Constitutive Model of Frozen–Thawed Fissured Quasi-Sandstone." Applied Sciences 12, no. 13 (2022): 6454. http://dx.doi.org/10.3390/app12136454.

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The artificial frozen wall crossing the water-rich sand layer is prone to failure during thawing. To study the loading fracture characteristics and damage evolution of single-fissured sandstone after thawing, quasi-sandstones with prefabricated single fissure at different angles were prepared using the sandstone of the Luohe Formation as the original rock to conduct freeze–thaw tests with various temperature differences, and triaxial compression tests were performed on the samples. Based on the distribution theory of rock micro-element strength and static elastic modulus, a damage constitutive

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Bruno, Caterina L. E., Paola Antonaci, Pietro G. Bocca, Antonio S. Gliozzi, and Marco Scalerandi. "Linking Elastic Nonlinearity and Cracks Growth in Mortar Samples." Key Engineering Materials 417-418 (October 2009): 293–96. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.293.

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One of the signatures of the presence of cracks in a sample is the nonlinearity in its elastic response to an impingent ultrasonic wave. The Fourier analysis is often inadequate to monitor the evolution of nonlinearity, since the signal-to-noise ratio of higher order harmonics is very low. In order to overcome this drawback, we suggest an alternative procedure to extract nonlinearity indicators from a recorded ultrasonic signal, based on the amplitude dependence of the response of the system. The procedure is first described and then used to analyse the evolution of the nonlinearity due to cra

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29

Negri, M. "From phase field to sharp cracks: Convergence of quasi-static evolutions in a special setting." Applied Mathematics Letters 26, no. 2 (2013): 219–24. http://dx.doi.org/10.1016/j.aml.2012.08.016.

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Li, Tian Yi, Jean Jacques Marigo, Daniel Guilbaud, and Serguei Potapov. "Variational Approach to Dynamic Brittle Fracture via Gradient Damage Models." Applied Mechanics and Materials 784 (August 2015): 334–41. http://dx.doi.org/10.4028/www.scientific.net/amm.784.334.

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In this paper we present a family of gradient-enhanced continuum damage models which can be viewed as a regularization of the variational approach to fracture capable of predicting in a unified framework the onset and space-time dynamic propagation (growth, kinking, branching, arrest) of complex cracks in quasi-brittle materials under severe dynamic loading. The dynamic evolution problem for a general class of such damage models is formulated as a variational inequality involving the action integral of a generalized Lagrangian and its physical interpretation is given. Finite-element based impl

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31

Meola, Carosena, Simone Boccardi, and Giovanni Maria Carlomagno. "The Contribution of Infrared Thermography in the Characterization of Glass/Epoxy Laminates through Remote Sensing of Thermal-Stress Coupled Effects." Proceedings 15, no. 1 (2019): 21. http://dx.doi.org/10.3390/proceedings2019015021.

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Mechanical stresses of materials are generally coupled with temperature variations and then, monitoring such variations can help gaining information about the material behavior under the applied loads. This can be accomplished with an infrared imaging device, which can be advantageously exploited to sense the thermal radiation associated with mechanical stresses and to obtain a legible explicative temperature map. In the present paper, glass/epoxy is used as material case study to show that thermal signatures visualized during the load application can be decoded into knowledge, which can contr

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32

Gomez, Q., and I. R. Ionescu. "Micro-mechanical fracture dynamics and damage modelling in brittle materials." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2196 (2021): 20200125. http://dx.doi.org/10.1098/rsta.2020.0125.

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This study explores the interplay between wave propagation and damage in brittle materials. The damage models, based on micro-mechanical fracture dynamics, capture any possible unstable growth of micro-cracks, introducing a macroscopic loss of stability. After stating the non-dimensional mathematical problem describing the wave propagation with damage, we introduce a non-dimensional number, called the microscopic evolution index, which links the micro and macro scales and discriminates the microscopic scale behaviour. For large values of microscopic evolution index, corresponding to a microsco

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Zhang, Xiaolong, and Zheng Zhong. "Thermo-Chemo-Elasticity Considering Solid State Reaction and the Displacement Potential Approach to Quasi-Static Chemo-Mechanical Problems." International Journal of Applied Mechanics 10, no. 10 (2018): 1850112. http://dx.doi.org/10.1142/s1758825118501120.

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Engineering materials and structures represent complex behaviors when reacting to superposed influences of mechanical forces, high temperature, diffusion and reaction of chemicals, which could cause large internal stresses and further induce cracks or failure. To determine the material reliability and integrity, the multi-field interactions and stresses/strains evolutions need to be identified at first. We proposed a theory of thermo-chemo-elasticity considering solid state reactions between the solid phase and absorbed chemicals in a stressed-solid. Both diffusion–reaction induced chemical st

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Bahmani, Bahador, Reza Abedi, and Philip Clarke. "A Stochastic Bulk Damage Model Based on Mohr-Coulomb Failure Criterion for Dynamic Rock Fracture." Applied Sciences 9, no. 5 (2019): 830. http://dx.doi.org/10.3390/app9050830.

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We present a stochastic bulk damage model for rock fracture. The decomposition of strain or stress tensor to its negative and positive parts is often used to drive damage and evaluate the effective stress tensor. However, they typically fail to correctly model rock fracture in compression. We propose a damage force model based on the Mohr-Coulomb failure criterion and an effective stress relation that remedy this problem. An evolution equation specifies the rate at which damage tends to its quasi-static limit. The relaxation time of the model introduces an intrinsic length scale for dynamic fr

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35

Badal, Rufat, Manuel Friedrich, and Joscha Seutter. "Existence of quasi-static crack evolution for atomistic systems." Forces in Mechanics, November 2022, 100138. http://dx.doi.org/10.1016/j.finmec.2022.100138.

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Xu, Hao, Marta Kuczynska, Natalja Schafet, Fabian Welschinger, and Jörg Hohe. "FE-based damage modeling approach for short fiber reinforced thermoplastics under quasi-static load coupling anisotropic viscoplasticity and matrix degradation." Journal of Composite Materials, June 19, 2022, 002199832211093. http://dx.doi.org/10.1177/00219983221109327.

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It is challenging to predict the material degradation and crack initiation of short fiber reinforced thermoplastics (SFRT) components with high computation efficiency and low parameter identification effort. To achieve that, this work utilizes a hybrid method combining micro- and macro-mechanical approaches to describe the damage-coupled material behavior of SFRT. The Mori-Tanaka mean-field homogenization method is used to determine the effective linear elastic properties of SFRT, whereas the consideration of plasticity is based on a macro-mechanical anisotropic viscoplastic model. The effect

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Bhat, Harsha S., Ares J. Rosakis, and Charles G. Sammis. "A Micromechanics Based Constitutive Model for Brittle Failure at High Strain Rates." Journal of Applied Mechanics 79, no. 3 (2012). http://dx.doi.org/10.1115/1.4005897.

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The micromechanical damage mechanics formulated by Ashby and Sammis, 1990, “The Damage Mechanics of Brittle Solids in Compression,” Pure Appl. Geophys., 133(3), pp. 489–521, and generalized by Deshpande and Evans 2008, “Inelastic Deformation and Energy Dissipation in Ceramics: A Mechanism-Based Constitutive Model,” J. Mech. Phys. Solids, 56(10), pp. 3077–3100. has been extended to allow for a more generalized stress state and to incorporate an experimentally motivated new crack growth (damage evolution) law that is valid over a wide range of loading rates. This law is sensitive to both the cra

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Zanuy Sánchez, Carlos, and Gonzalo S. D. Ulzurrun. "Time-variation of shear forces affecting the impact resistance of reinforced concrete beams." Hormigón y Acero, November 18, 2022. http://dx.doi.org/10.33586/hya.2022.3088.

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One of the most hazardous scenarios for reinforced concrete (RC) members is due to the actuation of impact loads. Such impacts may be either accidental or induced events. Experimental research has demonstrated that the failure mode of RC beams is strongly governed by shear, due either to the formation of a shear plug close to the impact point or to the full development of inclined shear-bending cracks along the shear span. In order to analyze the shear strength under impact conditions, it is essential to understand how the development of inertia forces leads to a time-dependent distribution of

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Gao, Yushan, Wei Jiang, and Shihui Huo. "Fracture mechanism and failure criterion of S-07 steel for liquid rocket engine." Multidiscipline Modeling in Materials and Structures, March 1, 2023. http://dx.doi.org/10.1108/mmms-11-2022-0257.

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PurposeThe fracture mechanism of S-07 steel was investigated by observing the fracture surface of the specimens with scanning electron microscope (SEM). Furthermore, the overall elastic–plastic behaviors and the stress state evolution during the loading procedure of all specimens were simulated by FE analysis to obtain the local strain at crack nucleated location and the average triaxiality of each type of specimen.Design/methodology/approachThree types of tests under various stress states were performed to study the ductile fracture characteristics of S-07 high strength steel in quasi-static

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