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Journal articles on the topic 'Multiaxial Strength'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Kawai, M. "Anisotropic size effect law for notched strength of unidirectional carbon/epoxy laminates – Part 1: Formulation." Journal of Composite Materials 51, no. 5 (July 28, 2016): 593–602. http://dx.doi.org/10.1177/0021998316651481.

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A multiaxial quasi-brittle failure criterion for notched orthotropic composites is developed with an emphasis on establishment of an analytical formula to predict their anisotropic notched strength for any notch size under any multiaxial proportional loading. It is formulated by replacing the principal unnotched strengths with the principal notched strengths in the framework of the Tsai–Hill static failure criterion for orthotropic composites. The effects of notch size and specimen width on the principal notched strengths are described by means of the Suo-Ho-Gong model that can consider notch ductile-to-brittle transition. From the proposed multiaxial quasi-brittle failure criterion, an analytical formula is derived to predict the notched strength of finite orthotropic composite plates under multiaxial proportional loading at any angle with the principal directions of material anisotropy. The notched strength prediction formula involves a generalized notch sensitivity parameter that can be defined for any multiaxial state of stress. The multiaxial notch sensitivity parameter allows uniquely defining an intrinsic equivalent mode-I fracture toughness that is independent of notch size as well as of specimen width for any multiaxial proportional loading. Furthermore, an anisotropic size effect law for apparent equivalent mode-I fracture toughness that considers not only the effect of notch size but also the effect of specimen width is derived from the failure criterion. Finally, a quasi-brittle failure criterion for notched interface is briefly discussed as a particular case of the proposed quasi-brittle failure criterion for notched orthotropic composites.

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2

Qin, Li Kun, Ling Xia Gao, and Hong Wei Song. "Influence of Freeze-Thaw Cycles on Multiaxial Strength of Concrete." Applied Mechanics and Materials 405-408 (September 2013): 2715–18. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.2715.

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Mechanical properties experiments of concrete after 0, 25, 50 and 75 freeze-thaw cycles under uniaxial and multiaixial compression were carried out. The uniaxial and multiaxial compressive strengths of ordinary concrete after freeze-thaw cycles were measured. According to the experiment results, the influence of freeze-thaw cycles on the ultimate compressive and tensile strength was analyzed systematically. The influence law of freeze-thaw cycles on compressive strength of concrete under multiaxial compression was obtained. The results indicate that the compressive strength of ordinary concrete after freeze-thaw cycles under multiaxial compression is higher than that under uniaxial compression, and the degree of improvement is depended on its stress ratio. This conclusion can propose theoretical foundation for design of concrete structures in cold environment

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3

Berto, Filippo, Alberto Campagnolo, Torgeir Welo, Sabrina Vantadori, and Andrea Carpinteri. "Multiaxial fatigue strength of titanium alloys." Frattura ed Integrità Strutturale 11, no. 41 (June 28, 2017): 79–89. http://dx.doi.org/10.3221/igf-esis.41.12.

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4

Philippidis, T. P., and A. P. Vassilopoulos. "Fatigue Strength Prediction under Multiaxial Stress." Journal of Composite Materials 33, no. 17 (September 1999): 1578–99. http://dx.doi.org/10.1177/002199839903301701.

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5

Ozdemir, Huseyin, and Kadir Bilisik. "Off-Axis Flexural Properties of Multiaxis 3D Basalt Fiber Preform/Cementitious Concretes: Experimental Study." Materials 14, no. 11 (May 21, 2021): 2713. http://dx.doi.org/10.3390/ma14112713.

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Multiaxis three-dimensional (3D) continuous basalt fiber/cementitious concretes were manufactured. The novelty of the study was that the non-interlace preform structures were multiaxially created by placing all continious filamentary bundles in the in-plane direction of the preform via developed flat winding-molding method to improve the fracture toughness of the concrete composite. Principle and off-axis flexural properties of multiaxis three-dimensional (3D) continuous basalt fiber/cementitious concretes were experimentally studied. It was identified that the principle and off-axis flexural load-bearing, flexural strength and the toughness properties of the multiaxis 3D basalt concrete were extraordinarily affected by the continuous basalt filament bundle orientations and placement in the pristine concrete. The principle and off-axis flexural strength and energy absorption performance of the uniaxial (B-1D-(0°)), biaxial ((B-2D-(0°), B-2D-(90°) and B-2D-(+45°)), and multiaxial (B-4D-(0°), B-4D-(+45°) and B-4D-(−45°)) concrete composites were considerably greater compared to those of pristine concrete. Fractured four directional basalt concretes had regional breakages of the brittle cementitious matrix and broom-like damage features on the filaments, fiber-matrix debonding, intrafilament bundle splitting, and minor filament entanglement. Multiaxis 3D basalt concrete, particularly in the B-4D structure, controlled the crack phenomena and it was recognized as a more damage-tolerant material than the neat concrete.

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6

Garcia, Martin, Claudio A. Pereira Baptista, and Alain Nussbaumer. "Multiaxial fatigue study on steel transversal attachments under constant amplitude proportional and non-proportional loadings." MATEC Web of Conferences 165 (2018): 16007. http://dx.doi.org/10.1051/matecconf/201816516007.

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In this study, the multiaxial fatigue strength of full-scale transversal attachment is assessed and compared to original experimental results and others found in the literature. Mild strength S235JR steel is used and an exploratory investigation on the use of high strength S690QL steel and the effect of non-proportional loading is presented. The study focuses on non-load carrying fillet welds as commonly used in bridge design and more generally between main girders and struts. The experimental program includes 33 uniaxial and multiaxial fatigue tests and was partially carried out on a new multiaxial setup that allows proportional and non-proportional tests in a typical welded detail. The fatigue life is then compared with estimations obtained from local approaches with the help of 3D finite element models. The multiaxial fatigue life assessment with some of the well-known local approaches is shown to be suited to the analysis under multiaxial stress states. The accuracy of each models and approaches is compared to the experimental values considering all the previously cited parameters.

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7

KOBAYASHI, Koichi, Jun SAKAI, and Makoto SAKAMOTO. "Multiaxial Strength Behaviour of Bovine Trabecular Bone." Proceedings of the JSME Bioengineering Conference and Seminar 2000.11 (2000): 81–82. http://dx.doi.org/10.1299/jsmebs.2000.11.0_81.

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8

Huddleston, R. L. "An Improved Multiaxial Creep-Rupture Strength Criterion." Journal of Pressure Vessel Technology 107, no. 4 (November 1, 1985): 421–29. http://dx.doi.org/10.1115/1.3264476.

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An improved strength model is developed for predicting creep rupture under multiaxial stress states. The new model incorporates three independent stress parameters and distinguishes between life under tensile versus compressive stress states. Assessments of the new model based on experimental biaxial creep-rupture data for type 304 stainless steel tested at 593°C show the new model to be significantly more accurate than the classical criteria of von Mises, Tresca, or Rankine.

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9

Ashour, Hamdy A. "A compressive strength criterion for anisotropic rock materials." Canadian Geotechnical Journal 25, no. 2 (May 1, 1988): 233–37. http://dx.doi.org/10.1139/t88-027.

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This paper proposes a general compressive strength criterion for anisotropic rock materials under multiaxial states of stress. The proposed criterion is a generalization of the Von Mises' criterion for yielding of ductile metals, which has also been used previously as a strength criterion for brittle fracture in the spirit of both being limits of linear elastic behavior. The presently proposed criterion takes into consideration the effects of the confining pressure, the various stress components, and the material anisotropy on rock material failure in a multiaxial stress state. To verify the applicability of the proposed criterion, it has been used to construct the failure envelopes for several types of rock materials. Consequently, the constructed failure envelopes and the corresponding experimental results have been compared. In all cases, a close agreement with the experimental results has been achieved. This result demonstrates the versatility and applicability of the proposed strength criterion in representing the compressive strength behavior of anisotropic rock materials under complex multiaxial states of stress. Key words: strength, rock materials, anisotropy.

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10

Wang, Yumei, Zhiheng Deng, Jianzhuang Xiao, and Jun Sheng. "Mechanical properties of recycled aggregate concrete under multiaxial compression." Advances in Structural Engineering 23, no. 12 (May 4, 2020): 2529–38. http://dx.doi.org/10.1177/1369433220916934.

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The mechanical properties of recycled aggregate concrete under multiaxial compression were tested by servo-controlled setup (TAWZ-5000/3000). Properties of strength and stress–strain relation were obtained, and the influence factors of stress ratio and recycled coarse aggregate replacement ratio were analyzed. The results show that the strength of recycled aggregate concrete under multiaxial compression is higher than that of under uniaxial state, the stress ratio and recycled coarse aggregate replacement ratio have obvious effect on strength, and the shape of stress–strain curve is also varied with different levels of the two factors. Failure criterion can reflect the strength relation for recycled concrete under multiaxial stress state. Kupfer’s failure criterion is selected to describe strength properties under biaxial stress state, and the failure envelope reflects the energy absorption of different mix series. Based on octahedral stress theory, the tensile and compressive meridians have been proposed to analyze the strength characteristics under triaxial compression, and the theoretical values are well coherent with the test data.

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11

TAMIYA, Yoichi, Shuichi TANI, Akio INOUE, Sumio YOSHIOKA, Roku FUJIMOTO, and Akifumi IZUMI. "Multiaxial Fatigue Strength of Flexible Disc in Superconducting Generator Rotor. Prediction of Multiaxial Fatigue Strength Considering Mean Stress Effect." Journal of the Society of Materials Science, Japan 51, no. 5 (2002): 567–72. http://dx.doi.org/10.2472/jsms.51.567.

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12

Reis, Luís G., Vitor Anes, Bin Li, and Manuel de Freitas. "Effect of Non-Proportionality in the Fatigue Strength of 42CrMo4 Steel." Materials Science Forum 730-732 (November 2012): 757–62. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.757.

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The unexpected collapse of engineering structures is often caused by the fatigue phenomenon resulting from degradation of mechanical properties of materials due to multiaxial cyclic loadings. The interpretation of such degradation is a topic of intensive research in multiaxial fatigue. The fatigue strength is commonly evaluated by the equivalent stress based on the shear stress in the octahedral plane. However, the use of this kind of equivalent stress in the multiaxial fatigue criteria has been proven to be inappropriate. The degradation of mechanical properties of materials is dependent on several factors, e.g. the loading path has a strong influence on the fatigue strength. Non-proportional loadings cause higher damage in materials than proportional loadings for the same maximum equivalent stress. The purpose of this work is to study the effect of different multiaxial loadings on the 42CrMo4 steel and to improve the understanding about the relation between the fatigue strength and the sequential loading proportionality. The considered loadings were defined with the same history but with different load sequences and equivalent stress. To implement this work a biaxial servo-hydraulic fatigue machine was used. The fatigue life and crack angle were measured for each specimen. An analysis was made in order to correlate the crack initiation and fatigue life with the theoretical models, some remarks regarding these topics are presented.

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13

Papuga, Jan, Eva Cízová, and Aleksander Karolczuk. "Validating the Methods to Process the Stress Path in Multiaxial High-Cycle Fatigue Criteria." Materials 14, no. 1 (January 4, 2021): 206. http://dx.doi.org/10.3390/ma14010206.

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The paper discusses one of the key features in the multiaxial fatigue strength evaluation—the procedure in which the stress path is analyzed to provide relevant measures of parameters required by multiaxial criteria. The selection of this procedure affects the complete equivalent stress derived for any multiaxial load combinations. Three major concepts—the minimum circumscribed circle, minimum circumscribed ellipse, and moment of inertia methods—are described. Analytical solutions of their evaluation for multiaxial stress state with components described by harmonic functions are provided. The concepts are validated on available experimental data when included into six different multiaxial fatigue strength criteria. The results show that the moment of inertia results in too conservative results. Differences between both methods of circumscribed entities are much smaller. There are indications however that the minimum circumscribed ellipse solution works better for critical plane criteria and for the criteria based on stress tensor transformation into the Ilyushin deviatoric space. On the other hand, the minimum circumscribed ellipse solution tends to shift integral criteria to the conservative side.

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14

Riemann, Bryan L., Nancy Caggiano Tray, and Scott M. Lephart. "Unilateral Multiaxial Coordination Training and Ankle Kinesthesia, Muscle Strength, and Postural Control." Journal of Sport Rehabilitation 12, no. 1 (April 2003): 13–30. http://dx.doi.org/10.1123/jsr.12.1.13.

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Objectives:To determine the physiological adaptations that might occur with a 4-week unilateral multiaxial training program in lower leg kinesthesia, peak torque, and postural control.Study Design:True experimental pretest-posttest control-group design.Setting:Research laboratory.Subjects:26 healthy, active subjects (14 men, 12 women).Interventions:Subjects were assigned to an experimental or control group. The experimental group performed multiaxial coordination training 3 days/wk for 4 weeks.Main Outcome Measures:Both groups were tested 3 times, pretest and 2 and 4 weeks after training was initiated. Outcome measures included conscious appreciation of ankle kinesthesia, eversion and dorsiflexion isokinetic peak torque, and static and functional postural control.Results:Results revealed a significant Group × Test interaction only for inversion kinesthesia.Conclusions:Four weeks of multiaxial coordination training did not significantly improve any of the dependent variables in healthy individuals. Further research should consider the effects of such a program on injured subjects.

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15

LU, DeChun, GuoSheng WANG, and XiuLi DU. "Nonlinear multiaxial dynamic strength criterion for concrete material." SCIENTIA SINICA Technologica 44, no. 12 (December 1, 2014): 1319–32. http://dx.doi.org/10.1360/n092014-00107.

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16

Yanase, Keiji, and Masahiro Endo. "Prediction for multiaxial fatigue strength with small defects." MATEC Web of Conferences 12 (2014): 08002. http://dx.doi.org/10.1051/matecconf/20141208002.

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17

Lund, A. C., and C. A. Schuh. "Strength asymmetry in nanocrystalline metals under multiaxial loading." Acta Materialia 53, no. 11 (June 2005): 3193–205. http://dx.doi.org/10.1016/j.actamat.2005.03.023.

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18

Zouain, Nestor, Edgar Nobuo Mamiya, and Fábio Comes. "Using enclosing ellipsoids in multiaxial fatigue strength criteria." European Journal of Mechanics - A/Solids 25, no. 1 (January 2006): 51–71. http://dx.doi.org/10.1016/j.euromechsol.2005.07.006.

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19

Wang, Guosheng, Dechun Lu, Meng Li, Xin Zhou, Jinting Wang, and Xiuli Du. "Static–Dynamic Combined Multiaxial Strength Criterion for Concrete." Journal of Engineering Mechanics 147, no. 5 (May 2021): 04021017. http://dx.doi.org/10.1061/(asce)em.1943-7889.0001918.

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20

Wang, Zhi Qiang, and Wen Biao Liu. "Reasonable Strength Criterion Research of High Arch Dam Based on Brittle Failure Constitutive Relation." Applied Mechanics and Materials 578-579 (July 2014): 964–67. http://dx.doi.org/10.4028/www.scientific.net/amm.578-579.964.

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The brittle failure finite element method is widely used in arch dam safety evaluation, but it also has some problems, the concrete strength criterion is different, the dam failure range is different. This article first introduces brittle failure constitutive relation and three strength criterions, then takes a high arch dam as an example to compute, obtains some conclusions that the relative failure range of foundation plane corresponds to blaxial strength criterion is slightly bigger than the result of uniaxial strength criterion, is almost the same as the result of triaxial strength criterion. Because the influence of the third principal stress is compressed stress to the dam crack is taken into account under multiaxial strength criterion, therefore using multiaxial strength criterion is more reasonable.

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21

Pun, Chung Lun, Qian Hua Kan, Peter J. Mutton, Guo Zheng Kang, and Wen Yi Yan. "On Constitutive Models for Ratcheting of a High Strength Rail Steel." Advanced Materials Research 891-892 (March 2014): 1146–51. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.1146.

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The ratcheting behaviour of a hypereutectoid high strength rail steel with carbon content of 0.85% was experimentally studied under both uniaxial and bi-axial cyclic loadings recently by the authors. To numerically simulate the multiaxial ratcheting behaviour of the rail steel, the Abaqus built-in Lemaitre-Chaboche model was applied first in current study. Following Abaqus documentation, the material data for the Lemaitre-Chaboche model were calibrated from the uniaxial loading test results. Comparing with experimental data, the Lemaitre-Chaboche model with the calibrated data provides overpredictions for the ratcheting responses of the rail steel under both uniaxial and bi-axial loadings. After that, a modified cyclic plasticity model with a coupling multiaxial parameter in the isotropic and kinematic hardening rules was applied for the material. The material data for this modified model were calibrated from both uniaxial and bi-axial loading tests. Comparison between the simulated results and the experimental data show that this modified cyclic plasticity model has the capacity to simulate both uniaxial and multiaxial ratcheting behaviour of the hypereutectoid rail steel with an acceptable accuracy.

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22

Kalagi, Ganesh R., Rajashekar Patil, Sunil Kumar Shetty, and Madhukara Nayak. "Effect of SiC Nano powder on Multiaxial Woven and Chopped Randomly Oriented Flax/Sisal Fiber Reinforced composites." MATEC Web of Conferences 144 (2018): 02005. http://dx.doi.org/10.1051/matecconf/201814402005.

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A study has been carried out to investigate effect of SiC Nano powder on tensile and impact properties of Multiaxial layers of Flax and Sisal fiber reinforced composites and randomly oriented chopped Flax and Sisal fiber reinforced composites. It has been observed that tensile strength and impact strength were improved using 6% of SiC Nanopowder into Multiaxial layer (+45º/-45º, 0º/90º) of Flax and Sisal where as randomly oriented chopped Flax and Sisal fiber reinforced composites are improved in its stiffnes for the same composition of fiber, epoxy and SiC Nano powder. SEM Analysis are done to analyse the distribution of SiC in both Multiaxial layers of Flax and Sisal fiber reinforced composites and randomly oriented chopped Flax and Sisal fiber reinforced composites.

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23

Fojtík, František, Jan Papuga, Martin Fusek, and Radim Halama. "Validation of Multiaxial Fatigue Strength Criteria on Specimens from Structural Steel in the High-Cycle Fatigue Region." Materials 14, no. 1 (December 29, 2020): 116. http://dx.doi.org/10.3390/ma14010116.

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The paper describes results of fatigue strength estimates by selected multiaxial fatigue strength criteria in the region of high-cycle fatigue, and compares them with own experimental results obtained on hollow specimens made from ČSN 41 1523 structural steel. The specimens were loaded by various combinations of load channels comprising push–pull, torsion, bending and inner and outer pressures. The prediction methods were validated on fatigue strengths at seven different numbers of cycles spanning from 100,000 to 10,000,000 cycles. No substantial deviation of results based on the selected lifetime was observed. The PCRN method and the QCP method provide best results compared with other assessed methods. The results of the MMP criterion that allows users to evaluate the multiaxial fatigue loading quickly are also of interest because the method provides results only slightly worse than the two best performing solutions.

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24

Machado, Pedro Vinícius Sousa, Lucas Carneiro Araújo, Marcos Venicius Soares, and José Alexander Araújo. "The use of a modified critical plane model to assess multiaxial fatigue of steels with nonmetallic inclusions." MATEC Web of Conferences 300 (2019): 16005. http://dx.doi.org/10.1051/matecconf/201930016005.

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The goal of this research is to investigate the detrimental effect of non-metallic inclusions on the fatigue strength of the AISI 4140 steel under multiaxial loading conditions. In order to do so, a multiaxial fatigue model based on the critical plane approach is coupled with Murakami’s √area model. The proposed adaptation is very easy to calibrate and can also account for the higher probability of existing a fatal small defect as the volume of stresses material increases. Experimental multiaxial fatigue data were generated and compared with the estimates provided by the adapted multiaxial fatigue model and with its original version. The errors found are not higher than 10%.

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25

Turkmen, H. S., M. P. Miller, P. R. Dawson, and J. C. Moosbrugger. "A Slip-Based Model for Strength Evolution During Cyclic Loading." Journal of Engineering Materials and Technology 126, no. 4 (October 1, 2004): 329–38. http://dx.doi.org/10.1115/1.1789967.

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Motivated by the strong dependence of strain-hardening processes on slip system activity, a slip system hardening formulation that explicitly employs accumulated slip system shear strains and net crystal shearing rates is introduced within a polycrystal plasticity modeling formulation for predicting material response during cyclic deformation. The model, which is a slight modification of the Voce hardening model commonly employed for large strain forming simulations, was employed to model the behavior of 304L stainless steel subjected to uniaxial and multiaxial nonproportional multiple-step experiments and multiaxial multiple-phase angle experiments. The model successfully captured the pseudosaturation response that is common during the multiple-step tests and captured many of the loop-shape and stress-level features of the multiple-phase angle experiments.

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26

Ozdemir, Huseyin, and Kadir Bilisik. "Experimental Study on Angular Flexural Performance of Multiaxis Three Dimensional (3D) Polymeric Carbon Fiber/Cementitious Concretes." Polymers 13, no. 18 (September 11, 2021): 3073. http://dx.doi.org/10.3390/polym13183073.

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Multiaxis three-dimensional (3D) continuous polymeric carbon fiber/cementitious concretes were introduced. Their angular (off-axis) flexural properties were experimentally studied. It was found that the placement of the continuous carbon fibers and their in-plane angular orientations in the pristine concrete noticeably influenced the angular flexural strength and the energy absorption behavior of the multiaxis 3D concrete composite. The off-axis flexural strength of the uniaxial (C-1D-(0°)), biaxial (C-2D-(0°), and C-2D-(90°)), and multiaxial (C-4D-(0°), C-4D-(+45°) and C-4D-(−45°)) concrete composites were outstandingly higher (from 36.84 to 272.43%) than the neat concrete. Their energy absorption capacities were superior compared to the neat concrete. Fractured four directional polymeric carbon fiber/cementitious matrix concretes limited brittle matrix failure and a broom-like fracture phenomenon on the filament bundles, filament-matrix debonding and splitting, and minor filament entanglement. Multiaxis 3D polymeric carbon fiber concrete, especially the C-4D structure, controlled the crack phenomena and was considered a damage-tolerant material compared to the neat concrete.

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27

Mandolini, A., A. Diambra, and E. Ibraim. "Strength anisotropy of fibre-reinforced sands under multiaxial loading." Géotechnique 69, no. 3 (March 2019): 203–16. http://dx.doi.org/10.1680/jgeot.17.p.102.

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28

Berto, Filippo, Abedin Gagani, Raffaella Aversa, Relly Victoria V. Petrescu, Antonio Apicella, and Florian Ion T. Petrescu. "Multiaxial Fatigue Strength to Notched specimens made of 40CrMoV13.9." American Journal of Engineering and Applied Sciences 9, no. 4 (April 1, 2016): 1269–91. http://dx.doi.org/10.3844/ajeassp.2016.1269.1291.

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29

Berto, F., P. Lazzarin, and R. Tovo. "Multiaxial fatigue strength of severely notched cast iron specimens." International Journal of Fatigue 67 (October 2014): 15–27. http://dx.doi.org/10.1016/j.ijfatigue.2014.01.013.

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30

Shi, Linlin, Licheng Wang, Yupu Song, and Lu Shen. "Dynamic multiaxial strength and failure criterion of dam concrete." Construction and Building Materials 66 (September 2014): 181–91. http://dx.doi.org/10.1016/j.conbuildmat.2014.05.076.

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31

Černý, Miroslav, and Jaroslav Pokluda. "The theoretical strength of fcc crystals under multiaxial loading." Computational Materials Science 50, no. 7 (May 2011): 2257–61. http://dx.doi.org/10.1016/j.commatsci.2011.03.002.

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32

Itoh, Takamoto, Fumio Ogawa, and Takahiro Morishita. "Fatigue Testing and Evaluation of Fatigue Strength under Multiaxial Stress State; Why do we need fatigue testing?" MATEC Web of Conferences 159 (2018): 01050. http://dx.doi.org/10.1051/matecconf/201815901050.

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Types of multiaxial fatigue tests and their experimental results are presented in this paper. There are typical three types in multiaxial fatigue tests: the combining push-pull and reversed torsion loading test using hollow cylinder specimen, the biaxial tension-compression test using cruciform specimen and the inner pressure applied the push-pull loading test using the hollow cylinder specimen. In the combining a push-pull loading and a reversed torsion loading test, failure life under non-proportional loading in which principal directions of stress and strain were changed in a cycle was shortened compared to proportional loading in which those are fixed. Fatigue lives were well-correlated using a non-proportional strain range considering the effect of strain path and material dependence. In the biaxial tension-compression test, the failure life decreased with increase of the principal strain ratio. In the inner pressure applied the push-pull loading test, cyclic deformation behaviour due to complex loading paths of multiaxial fatigue tests with the inner pressure associated with push-pull and rev. torsion acted to reduce the failure lives. Experimental investigation of multiaxial failure life and elucidation of their governing mechanism is essential and it can broaden the applicability of structural components.

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33

Černý, Miroslav, Petr Šesták, and Jaroslav Pokluda. "Stress Coupling Effect on Ideal Shear Strength: Tungsten as a Case Study." Advances in Materials Science and Engineering 2016 (2016): 1–5. http://dx.doi.org/10.1155/2016/5317985.

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Mechanical response of a perfect bcc tungsten crystal to a multiaxial loading was investigated from first principles. The multiaxial stress state consisted of the shear stress and a superimposed compressive triaxial stress with various levels of differential stresses. The studied shear system was 111110. Results obtained within a relatively wide range of the compressive stresses showed that increasing hydrostatic triaxial stress (with zero differential stresses) increased the shear strength almost linearly. On the other hand, triaxial stresses with greater portion of the differential components did not have such a simple effect on the shear strength: we found a certain optimum value of the superimposed triaxial stress yielding the maximum shear strength. Any change (both increase and decrease) in the triaxial stress then reduced the ideal shear strength value.

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34

Wang, Guosheng, Dechun Lu, Xiuli Du, and Xin Zhou. "Dynamic Multiaxial Strength Criterion for Concrete Based on Strain Rate–Dependent Strength Parameters." Journal of Engineering Mechanics 144, no. 5 (May 2018): 04018018. http://dx.doi.org/10.1061/(asce)em.1943-7889.0001428.

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35

Peralta, A. D., D. C. Wu, P. J. Brehm, J. C. Cuccio, and M. N. Menon. "Strength Prediction of Ceramic Components Under Complex Stress States." Journal of Engineering for Gas Turbines and Power 118, no. 4 (October 1, 1996): 856–62. http://dx.doi.org/10.1115/1.2817006.

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The capability to perform accurate fast-fracture strength predictions for ceramic components under complex stress states must be available in order to transition the use of advanced, high-strength ceramic materials from the laboratory to the high-strength/high-temperature applications they are intended for. Multiaxial strength prediction theories have provided the prediction capabilities, but only limited testing of these theories under complex states of stress and stress gradient conditions has been performed previously. Presented here are comprehensive test results and strength predictions for ceramic components subjected to complex states of stress and stress gradient conditions. The results show excellent agreement of the predictions from the multiaxial theories with test results for volumetrically distributed flaws. An important finding of this work is the problem that arises in performing component surface strength predictions from database-type specimens. Database-type specimens and component surface properties are not necessary correlated, and in many cases it may be completely inaccurate to use database-type specimen surface properties for component surface strength predictions.

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36

Lamon, Jacques. "Ceramics Reliability: Statistical Analysis of Multiaxial Failure Using the Weibull Approach and the Multiaxial Elemental Strength Model." Journal of the American Ceramic Society 73, no. 8 (August 1990): 2204–12. http://dx.doi.org/10.1111/j.1151-2916.1990.tb07577.x.

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37

Ren, Yan Long. "Study on Bearing Capacity of Cylindraceous Double-Concrete Shaft Lining." Advanced Materials Research 368-373 (October 2011): 3022–27. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.3022.

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In this paper, elastic stress solution of cylindraceous double-concrete shaft lining was obtained by plane strain model. We derived the dimensionless formula of interface pressure of the double wall. So considering of that the concrete strength were largely improved under multiaxial compressed, we got the relationship between concrete strength increased coefficient of inner, outer shaft lining and geometry size, elastic-module, Poisson’s ratio of shaft lining by theoretical deriving, then the formulate of double-concrete shaft lining ultimate bearing capacity was proposed based on multiaxial strength criterion of concrete (G-W Failure Criteria) which advised by the existing design of concrete structure specification. All these provided a theoretical basis for rational calculating the ultimate bearing capacity of double-concrete composite shaft lining. The results were great significance for us to reduce the concrete design strength grade of shaft lining and project cost by using double-concrete composite shaft lining.

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Ma, Jing, Yan Wang, and Ling Qiang Yang. "Numerical Simulation of Internal Defects in CSG Concrete (IV)." Advanced Materials Research 1065-1069 (December 2014): 1817–20. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.1817.

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The objective of this paper is to quantify the influence of internal defect on the multiaxial strength. Numerical analyses are performed for the second and third axial strength of the concrete. The analysis result indicated the existence of defects not only decreases the strength of materials, but also changed the stress state of the specimen.

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Wang, Huai Liang, and Jun Yu Yuan. "Dynamic Failure Surface of Concrete under Multiaxial Dynamic Loads." Advanced Materials Research 261-263 (May 2011): 228–32. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.228.

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Study on the dynamic behavior of concrete is important, for the sake of seismic design and safety evaluation of mass concrete structures, such as concrete dams, nuclear reactors and so on. There have been a lot of uniaxial strength experiment data of concrete under dynamic loading, but multiaxial data is scarce, for the test of multiaxial strength of concrete under dynamic loading is difficult, while most mass structures work under multiaxial static and dynamic stress states. In this paper a three-dimension failure criterion of concrete under dynamic loading in octahedral stress space was proposed. Then the multixial strength tests of concrete under dynamic loading were carried out with concrete triaxial static and dynamic apparatus system. The selected loading paths consisted of uniaxial compression and tension, biaxial proportional loading compression, biaxial compression with one constant lateral compression and triaxial compression with two constant lateral compressions. In the test the strain rate range is 10-5~10-2/s. Based on the test data and the literature data, the characteristic of this failure surface is that it considered the influence of the strain rate and the angle of similarity; it is smooth, convex in meridian and deviatoric plane. The proposed model for nonlinear dynamic analysis and design of mass concrete structures under dynamic loading is useful.

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40

Stepanov, Nikita, Dmitry Shaysultanov, Nikita Yurchenko, Margarita Klimova, Sergey Zherebtsov, and Gennady Salishchev. "Microstructure Refinement in the CoCrFeNiMn High Entropy Alloy under Plastic Straining." Materials Science Forum 879 (November 2016): 1853–58. http://dx.doi.org/10.4028/www.scientific.net/msf.879.1853.

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The effect of plastic deformation under various conditions of the equiatomic CoCrFeNiMn alloy with single face-centered cubic phase structure was studied. The alloy was rolled at room and cryogenic temperatures, and uniaxially compressed at room temperature and temperatures of 600-1100°C with different height reductions. In addition, multiaxial forging at 900-1000°C was performed. Scanning and transmission electron microscopy, including EBSD analysis, was widely employed to characterize microstructure of the deformed alloy. At room and cryogenic temperatures, mechanical twinning and shear banding plays play dominant role in microstructure evolution. Extensive refinement of the microstructure occurs as the result of rolling with reduction of 80%. During deformation at 600-1100°C, discontinuous dynamic recrystallization takes place. The recrystallized grains size and their volume fraction increases with increase of deformation temperature. Multiaxial forging at 900-1000°C was used to produce fully recrystallized structure with average grain size of 6.7 μm. The alloy in the initial condition had low yield strength of 160 Mpa but remarkable tensile ductility of 68%. Rolling substantial increases yield strength to 1120-1290 MPa, but results in loss of ductility. After multiaxial forging the alloy has balanced combination of properties – yield strength of 280 MPa and elongation of 56%.

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41

Hojjati Talemi, Reza, Jie Zhang, Stijn Hertelé, and Wim De Waele. "Finite Element Analysis of Fretting Fatigue Fracture in Lug Joints Made of High Strength Steel." MATEC Web of Conferences 165 (2018): 11005. http://dx.doi.org/10.1051/matecconf/201816511005.

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Many structural applications are aiming for weight reduction by using high strength steel. In a lug joint the load is transmitted by a pin, which leads to a pressure distribution on the hole in the lug. When a lug joint is subjected to axial cyclic loading conditions, the stress distribution becomes multiaxial, i.e. a combination of normal and tangential stresses. In such loading case, a fretting crack initiates at the contact interface between the pin/lug connection which is followed by a fatigue crack propagation up to the final rupture of the lug. In this study, the fretting fatigue crack initiation and propagation in a pin/lug joint are simulated using multiaxial fatigue criterion and fracture mechanics, respectively. To do so, first a 2D finite element model is developed for obtaining stresses and strains at the contact interface in a pin/lug joint. Using the extracted data, fretting fatigue failure parameters are analysed. Next, the obtained stresses and strains are used to estimate the crack initiation lifetime using a fatigue multiaxial critical plane model. A 3D model is set-up to simulate the crack propagation using eXtended Finite Element Method (XFEM). Eventually, the predicted total fatigue lifetimes are compared against experimental observations taken from literature.

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42

Skibicki, Dariusz. "Multiaxial fatigue life and strength criteria for non-proportional loading*." Materials Testing 48, no. 3 (March 2006): 99–102. http://dx.doi.org/10.3139/120.100717.

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43

Vantadori, Sabrina, Joel Boaretto, Giovanni Fortese, Felipe Giordani, Roberto Isoppo Rodrigues, Ignacio Iturrioz, Camilla Ronchei, Daniela Scorza, and Andrea Zanichelli. "Fatigue strength of welded joints under multiaxial non-proportional loading." Procedia Structural Integrity 5 (2017): 761–68. http://dx.doi.org/10.1016/j.prostr.2017.07.167.

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44

Berto, F., and A. Campagnolo. "Multiaxial fatigue strength of severely notched titanium grade 5 alloy." Frattura ed Integrità Strutturale 9, no. 33 (June 19, 2015): 229–37. http://dx.doi.org/10.3221/igf-esis.33.29.

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45

MORISHITA, Takahiro, Takamoto ITOH, and Naoto KASAHARA. "Effect of inelastic multiaxial preloading on high cycle fatigue strength." Transactions of the JSME (in Japanese) 86, no. 891 (2020): 20–00225. http://dx.doi.org/10.1299/transjsme.20-00225.

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46

SAKAMOTO, Junji, Tomoka YAMADA, Naoya TADA, Takeshi UEMORI, and Tadahiro SHIBUTANI. "Fatigue strength evaluation of aluminum alloy under multiaxial random vibration." Proceedings of the Materials and Mechanics Conference 2019 (2019): OS0335. http://dx.doi.org/10.1299/jsmemm.2019.os0335.

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47

Benedetti, M., V. Fontanari, M. Bandini, and D. Taylor. "Multiaxial fatigue resistance of shot peened high-strength aluminum alloys." International Journal of Fatigue 61 (April 2014): 271–82. http://dx.doi.org/10.1016/j.ijfatigue.2013.10.020.

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Leitner, M., Z. Tuncali, R. Steiner, and F. Grün. "Multiaxial fatigue strength assessment of electroslag remelted 50CrMo4 steel crankshafts." International Journal of Fatigue 100 (July 2017): 159–75. http://dx.doi.org/10.1016/j.ijfatigue.2017.03.023.

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49

Quinn, George D., and Günter Wirth. "Multiaxial strength and stress rupture of hot pressed silicon nitride." Journal of the European Ceramic Society 6, no. 3 (January 1990): 169–77. http://dx.doi.org/10.1016/0955-2219(90)90014-7.

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50

Burchell, Tim, Terry Yahr, and Rick Battiste. "Modeling the multiaxial strength of H-451 nuclear grade graphite." Carbon 45, no. 13 (November 2007): 2570–83. http://dx.doi.org/10.1016/j.carbon.2007.08.015.

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