Holographic interferometry for the determination of fracture process zone in concrete

1990 ◽  
Vol 35 (1-3) ◽  
pp. 29-38 ◽  
Author(s):  
Ph. Regnault ◽  
E. Brühwiler
Keyword(s):  
Holographic Interferometry ◽  
Fracture Process ◽  
Fracture Process Zone ◽  
Process Zone

scholarly journals Determination of some characteristic fracture of concrete of notched beam in bending test

2020 ◽  
Vol 61 (HTCS6) ◽  
pp. 96-101
Author(s):  
Bui Truong Son ◽  
Pham Duc Tho ◽  
Nguyen Thi Nu ◽  
Tran The Truyen ◽  
Tran Nam Hung ◽  
...  
Keyword(s):  
Stress Intensity ◽  
Critical Stress ◽  
Fracture Process ◽  
Fracture Process Zone ◽  
Process Zone ◽  
Bending Test ◽  
Intensity Factors ◽  
Simulation Results ◽  
Compression Resistance

This paper presents the identification some principal fracture parameters of concretes by experiment and simulation on notched beam in bending. The comparison between experimental and simulation results allows to determinate the Critical stress intensity factors KIC, fracture energy Gf and characteristic lengths of fracture process zone (FPZ) lch of 6 class of concrete with the compression resistance varying from 20 MPa to 50 MPa. These are important parameter in the model for predicting the timelife of concrete structure exposed in coastal area.

Experimental determination of the fracture process zone in concrete

1983 ◽  
Vol 13 (4) ◽  
pp. 557-567 ◽  
Author(s):  
Luigi Cedolin ◽  
Sandro Dei Poli ◽  
Ivo Iori
Keyword(s):  
Experimental Determination ◽  
Fracture Process ◽  
Fracture Process Zone ◽  
Process Zone

Analysis of Energy Balance When Using Cohesive Zone Models to Simulate Fracture Processes

2002 ◽  
Vol 124 (4) ◽  
pp. 440-450 ◽  
Author(s):  
C. Shet ◽  
N. Chandra
Keyword(s):  
Cohesive Energy ◽  
Cohesive Zone ◽  
Strain Energy ◽  
Fracture Process ◽  
Fracture Process Zone ◽  
Process Zone ◽  
Elastic Strain Energy ◽  
Inelastic Strain ◽  
External Work ◽  
Cohesive Zone Models

Cohesive Zone Models (CZMs) are being increasingly used to simulate fracture and fragmentation processes in metallic, polymeric, and ceramic materials and their composites. Instead of an infinitely sharp crack envisaged in fracture mechanics, CZM presupposes the presence of a fracture process zone where the energy is transferred from external work both in the forward and the wake regions of the propagating crack. In this paper, we examine how the external work flows as recoverable elastic strain energy, inelastic strain energy, and cohesive energy, the latter encompassing the work of fracture and other energy consuming mechanisms within the fracture process zone. It is clearly shown that the plastic energy in the material surrounding the crack is not accounted in the cohesive energy. Thus cohesive zone energy encompasses all the inelastic energy e.g., energy required for grainbridging, cavitation, internal sliding, surface energy but excludes any form of inelastic strain energy in the bounding material.

Fiber Debonding Along a Crack Front in Paper

1998 ◽  
Vol 539 ◽  
Author(s):  
H. Kettunen ◽  
K. J. Niskanen
Keyword(s):  
Fracture Energy ◽  
Crack Front ◽  
Fracture Process ◽  
Fracture Process Zone ◽  
Process Zone ◽  
Bond Properties ◽  
Crack Line ◽  
Pull Out ◽  
Microscopic Damage ◽  
Debonding Process

AbstractWe follow the accumulation of microscopic damage ahead the crack tip in paper. The fiber debonding process varies even within each specimen because of large variation in fiber and bond properties. In general, stiff and weakly bonded fibers tend to debond as a rigid body while ductile or well bonded fibers pull out gradually in a process that propagates from the crack line to the fiber ends. Particularly in the latter case the network ruptures coherently rather than through debonding of single fibers. Experimental analysis and simulations show that fracture energy correlates closely with the size of the fracture process zone (FPZ) irrespective the nature of the debonding process. Only the cases of low bonding and stiff fibers seem to make an exception in that FPZ can grow in size without a corresponding increase in fracture energy.

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