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Measurement of dynamic fracture toughness and failure behavior for explosive mock materials

Pengwan CHEN, Zhongbin ZHOU, Shaopeng MA, Qinwei MA, Fenglei HUANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 292-295 doi: 10.1007/s11465-011-0237-8

Abstract: A high-speed camera was used to capture the deformation and fracture process of the specimen in situ.Results show that the method of combined DIC and SHPB is effective to study the dynamic deformation andfracture behavior of explosive simulants.The fracture toughness of the specimen was preliminary measured.

Keywords： bonded explosive simulant split Hopkinson pressure bar (SHPB) semicircular bending test deformation fracture

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Basic problems for dynamic deformation and fracture of deep rock mass

Li Jie,Wang Mingyang,Zhang Ning,Fan Pengxian

Strategic Study of CAE 2013, Volume 15, Issue 5, Pages 71-79

Abstract: The difficulty lies in how to describe the rock mass properties in large dynamic deformation and failureThe test reviews the research results for failure mechanism of deep rock mass, basic problems in dynamicdamage process(time effect, fracture description and so on) and characteristic scientific phenomena(characteristics of plastic flow and failure process, and reasonable means must be adopted to describe the fracture

Keywords： deep rock mass dynamic fracture time effect damage fracture rock burst zonal disintegration

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Dynamic crack propagation in plates weakened by inclined cracks: an investigation based on peridynamics

A. SHAFIEI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4, Pages 527-535 doi: 10.1007/s11709-018-0450-1

Abstract: It can be applied to fracture problems in contrast to the approach of fracture mechanics.In this paper by using peridynamics, the crack path for inclined crack under dynamic loading were investigatedThe peridynamics solution for this problem represents the main features of dynamic crack propagationThe results are compared with molecular dynamic solutions that seem to show reasonable agreement in branching

Keywords： peridynamics inclined crack dynamic fracture crack branching

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Research on the dynamic mechanical characteristics and turning tool life under the conditions of excessively

Genghuang HE, Xianli LIU, Fugang YAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 3, Pages 329-334 doi: 10.1007/s11465-012-0303-x

Abstract:

The dynamic mechanical characteristics of excessively heavy-duty cutting were analyzed based on theheavy-duty cutting processes, the model of dynamic shearing force in the cutting area was establishedHowever, the experimental results showed that the dynamic shear flow stress in the cutting area greatlyThe heavy-duty cutting tool was damaged in the form of a shearing fracture.Through a comprehensive analysis of the theory, the critical condition of the tools’ fracture under

Keywords： extreme loading cutting shear flow stress dynamic cutting force fatigue fracture

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Shock Tensile Behaviour of Tungsten Alloy and Presentations to Its Constitutive Models and Fracture Criterion

Zhang Baoping,Ding Chuntong,Liu Baohua,Chen Xuelian

Strategic Study of CAE 2003, Volume 5, Issue 3, Pages 44-50

Abstract: at the maximum load-onset of instability was derived, so that the criterion of shock tensile fractureThe fractal analysis to the tensile fracture was made which gives a strong support to the conclusions

Keywords： constitutive model for dynamic tension tungsten alloy criterion to dynamic failure

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Tests on impact effect of partial fracture at steel frame connections

CHEN Yiyi, BIAN Ruoning

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4, Pages 295-301 doi: 10.1007/s11709-008-0049-z

Abstract: Impact effect of sudden fracture at steel frame connections under severe earthquake or other extremeThe relation of impulse caused by structural fracture to the release of inner force at the cracked locationIt is also revealed that the instant fracture of structural connection is characterized by progressiveand partial fracture.Numerical evaluation of the impact effect of connection fracture is carried out.

Keywords： structural fracture natural fracture progressive high-frequency

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Effect of fly ash replacement level on the fracture behavior of concrete

Mahdi AREZOUMANDI, Jeffery S. VOLZ

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4, Pages 411-418 doi: 10.1007/s11709-013-0228-4

Abstract: results of an experimental investigation that evaluates effect of fly ash replacement level on the fractureThis experimental program consisted of 32 fracture beams to study the fracture behavior of concrete.The experimental fracture energies were compared with the fracture energy provisions of different designevaluate whether or not there is any statistically significant difference between the experimental fracturethese statistical tests show that the mix with higher level of fly ash replacement level has higher fracture

Keywords： concrete fracture energy fly ash

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Computational modeling of fracture in concrete: A review

Luthﬁ Muhammad Mauludin, Chahmi Oucif

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3, Pages 586-598 doi: 10.1007/s11709-020-0573-z

Abstract: This paper presents a review of fracture modeling of concrete.Based on comprehensive literature review, there are two main approaches considered to-date of concrete fractureThe purpose of this review is to provide insight comparison from different techniques in modeling of fractureIn the first section, an overview of fracture modeling in general is highlighted.

Keywords： concrete fracture macroscopic micromechanical heterogeneity

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Computational modeling of fracture in capsule-based self-healing concrete: A 3D study

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6, Pages 1337-1346 doi: 10.1007/s11709-021-0781-1

Abstract: We present a three-dimensional (3D) numerical model to investigate complex fracture behavior using cohesivepre-inserted cohesive elements are also applied into the initial meshes of solid elements to account for fractureThe proposed model provides an effective tool for predicting the complex fracture response of capsule-based

Keywords： 3D fracture self-healing concrete spherical cohesive elements heterogeneous

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Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2, Pages 288-293 doi: 10.1007/s11709-018-0480-8

Abstract: Generally, shearing fracture model occurs in both the tests.Shearing fracture angle is smaller than 45° under uniaxial compression and greater than 45° under uniaxialof material strength under uniaxial compression and tension is developed by correlating the shearing fracturerelation is quantitatively illustrated by a function for analyzing the material strength from shear fracture

Keywords： strength fracture mechanics

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A dimensional analysis on asphalt binder fracture and fatigue cracking

Qian ZHAO, Zhoujing YE

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 2, Pages 201-206 doi: 10.1007/s11709-017-0402-1

Abstract: Fracture and fatigue cracking in asphalt binder are two of most serious problems for pavement engineersconsists both of dimensional analysis using Buckingham Theorem and -integral analysis based on classic fracturemechanics, to evaluate the fracture and fatigue on asphalt binder.is discovered that the dimensional analysis could provide a new perspective to analyze the asphalt fracture

Keywords： Dimensional analysis asphalt fracture fatigue cracking

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Research on Direction and Location for Danger Prediction of Coal or Rock Dynamic Disaster

Xiao Hohgfei,He Xueqiu,Feng Tao,Wang Enyuan

Strategic Study of CAE 2005, Volume 7, Issue 11, Pages 81-86

Abstract: non-touch electromagnetic emission (EME) method to better forecast or predict the danger of coal or rock dynamicfeasible to study the direction and location of dangerous areas in predicting the danger of coal or rock dynamic

Keywords： rock or coal dynamic disaster danger prediction direction and location deformation and fracture of coal

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Experimental research on ductile fracture criterion in metal forming

Song YU, Weiming FENG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 308-311 doi: 10.1007/s11465-011-0233-z

Abstract:

Ductile fracture criterion is key limitation parameter in material forming.shearing test on 45# steel are utilized for providing the experimental values of the critical values at fracture, and 11 widely used ductile fracture criterion are selected to simulate the physical experiments andtheir relative accuracy for predicting and quantifying fracture initiation sites are investigated.triaxiality can be estimated successively using both Normalized Cockcroft-latham and the Brozzo ductile fracture

Keywords： ductile fracture criteria metal forming process material experiment stress triaxiality

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Hybrid deep learning model for risk prediction of fracture in patients with diabetes and osteoporosis

Frontiers of Medicine 2022, Volume 16, Issue 3, Pages 496-506 doi: 10.1007/s11684-021-0828-7

Abstract: The fracture risk of patients with diabetes is higher than those of patients without diabetes due toIn addition, the fracture risk of patients with diabetes and osteoporosis has not been further studiedIn this paper, a hybrid model combining XGBoost with deep neural network is used to predict the fracturepatients with diabetes and osteoporosis, and investigate the effect of patients’ physiological factors on fractureMoreover, the top 18 influencing factors of fracture risks of patients with diabetes are determined.

Keywords： XGBoost deep neural network healthcare risk prediction

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A concise review about fracture assessments of brittle solids with V-notches

Hsien-Yang YEH, Bin YANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2, Pages 478-485 doi: 10.1007/s11709-019-0520-z

Abstract:

A concise review of recent studies about the fracture assessments of elastic brittle solid materialsFracture criteria such as strain energy density, J-integral, theory of critical distance are used.

Keywords： fracture assessment brittle solids V-notches review