effects of some parameters on fracture resistance of

The effects of specimen size and testing conditions on

2001-10-1Despite some attempts trying to make crack growth adjustment are available in literature the real value of these corrections is still controversial and they lack in the definition of full constraint fracture parameters (32) J-R Curves Analysis and Prediction of a Permissible Extent of Ductile Crack Growth

Patching Hele

2 conducted to explore the effects of various intersection parameters on the hydraulic resistance of the fluid flow The results obtained using Hele-Shaw patching method and Navier Stokes equations were compared to illustrate the validity of the Hele-Shaw approximation for geothermal applications which is significantly computational efficient

Application of Fracture Mechanics to Cementitious

Many attempts have been made in the last two decades or so to apply the fracture mechanics concepts to cement mortar con crete and reinforced concrete So far these attempts have not led to a unique set of material parameters which can quantify the resistance of these cementitious composites to fracture

A REVIEW OF PARAMETERS AFFECTING DUCTILE

2017-6-16that cast aluminium components are of significantly higher resistance to fracture under shear than under tension Hence it would be interesting to study effects of solidification rates on fracture properties under compression and shear Results from previous experimental studies have revealed a nearly linear relationship between the tensile

CiteSeerX — Characterisation of Ductile Tearing

CiteSeerX - Document Details (Isaac Councill Lee Giles Pradeep Teregowda): The J integral which is widely used in elastic-plastic fracture mechanics is not the true driving force any more if the crack is propagating This leads to some inconsistencies when ductile tearing resistance is characterised in terms of J especially for large crack extensions

Experimental Fracture Toughness Study for some

The use of modifiers or additives in the asphalt mixtures is a suitable and common method for improving their mechanical properties especially under high temperature service conditions However for cold climates which the pavement of roads usually experience subzero temperatures the overall failure mechanism of asphalt layers may be occurred mainly due to elastic brittle fracture and growth

FractureToughness Testing of Polymer Matrix Composites

2013-8-30A fracture of the structure causes an increase in crack surface area as shown in figure 1 The fracture also causes changes in external work strain energy kinetic energy and fracture energy such that the energy balance condition (1) remains satisfied: AW = AU + AT + AD (2) If the fracture resistance R of material is defined as the

EFFECTS OF MICRO RESISTANCE SPOT WELDING

parameters lead to good quality joints This research studied the influence of the welding parameters such as welding current welding time and the electrode force of micro resistance spot welding (MRSW) on the mechanical properties and fracture of a nugget of aluminum alloy (AA) 1100

Measurement of the toughness of bone: A tutorial with

2008-10-20• nonlinear-elastic fracture mechanics fracture toughness (J c) [27 28] • crack-resistance curves (R-curves) [6 7 28–30] • nonlinear methods involving cohesive-zone models [31–33] However each of thesemethods assesses a different aspectof fracture resistance i e K c measurements essentially define the toughness to initiate

EFFECTS OF PROCESS PARAMETERS ON TENSILE

2020-6-29Some results previously published by Bodros et al [23] are very encouraging and point towards the possibilities of structural applications Nevertheless contrary to classical synthetic fibres (carbon glass) the behaviour of plant-based fibres depends strictly on their process parameters as emphasized for example by Davies and Bruce [24]

Studies of Some Brittle Fracture Concepts

2006-5-1Part III considers a critical fracture stress concept of cleavage fracture The effects of stress rate or strain rate temperature residual stress notch acuity and strain hardening in the vicinity of a flaw on low-stress brittle cleavage fracture initiation and propagation are formulated in the light of a critical fracture

Fracture mechanics

2020-7-30Fracture mechanics is the field of mechanics concerned with the study of the propagation of cracks in materials It uses methods of analytical solid mechanics to calculate the driving force on a crack and those of experimental solid mechanics to characterize the material's resistance to fracture In modern materials science fracture mechanics is an important tool used to improve the

The effects of specimen size and testing conditions on

2001-10-1Despite some attempts trying to make crack growth adjustment are available in literature the real value of these corrections is still controversial and they lack in the definition of full constraint fracture parameters (32) J-R Curves Analysis and Prediction of a Permissible Extent of Ductile Crack Growth

Effects of tensile loading on upper shelf fracture

article{osti_10140815 title = {Effects of tensile loading on upper shelf fracture toughness} author = {Joyce J A and Link R E} abstractNote = {Constraint has been an important consideration in fracture mechanics from the earliest work that was done to develop the 1974 version of the ASTM Standard E399 O`Dowd and Shih (1991) have proposed that the difference in crack tip stress fields

Fracture and Low Cycle Fatigue of Al

The results of experiments conducted have shown that the damage tolerant Al-Li sheet alloys 2091 and 2090 possess acceptable fracture toughness crack resistance constant amplitude fatigue crack growth properties (with and without occasional peak loads) and corrosion and stress corrosion resistance as compared to conventional alloys like 2024-T3

Temperature and pore pressure effects on the shear

some stage the rupture will be resisted by patches of high rupture growth resistance such as asperities and barriers along the fault The highest rupture growth resistance of the fault zone depends on the shear fracture properties required to shear the largest asperity Furthermore at high pressures and

The Effects of Cyclic and Dynamic Loading on the

The Effects of Cyclic and Dynamic Loading on the Fracture Resistance of Nuclear Piping Steels Technical Report October 1992 - April 1996 Manuscript Completed: September 1996 Date Published: December 1996 Prepared by D L Rudland F Brust G M Wilkowski Battelle 505 King Avenue Columbus OH 43201 M E Mayfield NRC Project Manager

The effects of concurrent training (aerobic

2018-12-17Osteoporosis is a skeletal metabolic disorder characterized by low bone mineral density (BMD) and reduced bone strength leading to higher bone fractures risk The present study attempted to investigate the effects of concurrent training (aerobic-resistance) and milk consumption on some markers of BMD in women with osteoporosis For this purpose forty women diagnosed with osteoporosis

Effects of tensile loading on upper shelf fracture

The objective of this work is to develop some upper shelf elastic-plastic experimental results to attempt to investigate the applicability of the Q and T stress parameters to the correlation of upper shelf initiation toughness and J resistance curves The first objective was to obtain upper shelf J resistance curves J sub Ic and tearing resistance T sub mat results for a range of applied

Effects of high

We examined the effects of HP diet consumption on food intake body-weight gain body composition and renal bone and metabolic parameters of rats performing resistance training A total of ninety-six adult male Wistar rats were randomly distributed in twelve experimental groups (n 8): normal-protein (10%) or HP (45%) diets with or without

Fracture Toughness of Ferritic Steels in the Ductile

2015-10-20Figure 1 Fracture behavior of different materials as a function of temperature The characterization of fracture resistance of ferritic steels in this region is problematic due to scatter in results as well as size and temperature dependences [2–9] Size effects imply decreasing of the median value of fracture toughness and a larger scatter in small specimen than in larger ones

The effects of concurrent training (aerobic

2018-12-17Osteoporosis is a skeletal metabolic disorder characterized by low bone mineral density (BMD) and reduced bone strength leading to higher bone fractures risk The present study attempted to investigate the effects of concurrent training (aerobic-resistance) and milk consumption on some markers of BMD in women with osteoporosis For this purpose forty women diagnosed with osteoporosis

EFFECTS OF AGGREGATE TYPE SIZE AND CONTENT ON

2014-1-8concrete principally about the effects on fracture energy Some research (Strange and Bryant 1979 Nallathambi Karihaloo and Heaton 1984) has shown that there is an increase in fracture toughness with an increase in aggregate size However Gettu and Shah (1994) have stated that in some high-strength concretes where the coarse