An indentation technique for estimating the energy density as fracture toughness with Berkovich indenter for ductile bulk materials

2011 ◽  
Vol 56 (2) ◽  
pp. 104-111 ◽  
Author(s):  
Min He ◽  
Fuguo Li ◽  
Jun Cai ◽  
Bo Chen
Keyword(s):  
Fracture Toughness ◽  
Energy Density ◽  
Berkovich Indenter ◽  
Bulk Materials ◽  
Indentation Technique

A Method to Determine Fracture Toughness Using Berkovich Indenter for Bulk Materials

2013 ◽  
Vol 331 ◽  
pp. 456-460
Author(s):  
Min He ◽  
Duan Hu Shi ◽  
Feng Yang ◽  
Ning Zhang ◽  
Hua Feng Guo
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Elastic Modulus ◽  
Penetration Depth ◽  
Effective Elastic Modulus ◽  
Berkovich Indenter ◽  
Bulk Materials ◽  
Ductile Materials ◽  
Penetration Depths ◽  
Determine Fracture Toughness

An indentation approach with Berkovich indenter is proposed to determine fracture toughness for ductile materials. With decrease of effective elastic modulus, an approximate linear relationship between logarithmic plastic penetration depth and logarithmic effective elastic modulus, and a quadratic polynomial relationship between the plastic penetration depths and penetration loads are exhibited by indentation investigation with Berkovich indenter. The damage constructive equation of effective elastic modulus is proposed to determine the critical effective elastic modulus at the fracture point, which is the key problem to calculate the indentation energy to fracture. The critical plastic penetration depth is identified after the critical effective elastic modulus can be predicted by conventional mechanical properties. The fracture toughness is calculated according to the equation of penetration load, plastic penetration depth and the critical plastic penetration depth.

Indentation technique for estimating the fracture toughness of 7050 aluminum alloy with the Berkovich indenter

2012 ◽  
Vol 40 ◽  
pp. 176-184 ◽  
Author(s):  
Jiang Li ◽  
Fuguo Li ◽  
Min He ◽  
Fengmei Xue ◽  
Mingjie Zhang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Aluminum Alloy ◽  
Berkovich Indenter ◽  
Indentation Technique ◽  
7050 Aluminum Alloy

Nondestructive Estimation of Fracture Toughness Using Instrumented Indentation Technique

2008 ◽  
Vol 385-387 ◽  
pp. 893-896
Author(s):  
Kyung Woo Lee ◽  
Hyun Uk Kim ◽  
Sang Wook Park ◽  
Jung Suk Lee ◽  
Kwang Ho Kim ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Damage Mechanics ◽  
Volume Fraction ◽  
Fracture Initiation ◽  
Continuum Damage Mechanics ◽  
Instrumented Indentation ◽  
Initiation Point ◽  
Indentation Technique ◽  
Proposed Model ◽  
Main Ideas

This study focused on the determination of fracture toughness by instrumented indentation technique. A theoretical model to estimate the fracture toughness of ductile materials is proposed and used to verify those results. Modeling of IIT to evaluate fracture toughness is based on two main ideas; the energy input up to characteristic fracture initiation point during indentation was correlated with material’s resistance to crack initiation and growth, and this characteristic fracture initiation point was determined by concepts of continuum damage mechanics. The estimated fracture toughness values obtained from the indentation technique showed good agreement with those from conventional fracture toughness tests based on CTOD. In addition, we confirmed that the proposed model can be also applied in the brittle material through modification of void volume fraction.

Fracture toughness of thermal spray ceramic coatings determined by the indentation technique

1993 ◽  
Vol 2 (1) ◽  
pp. 35-38 ◽  
Author(s):  
G. K. Beshish ◽  
C. W. Florey ◽  
F. J. Worzala ◽  
W. J. Lenling
Keyword(s):  
Fracture Toughness ◽  
Thermal Spray ◽  
Ceramic Coatings ◽  
Indentation Technique

Evaluation of fracture toughness of duplex microstructures by an indentation technique

1994 ◽  
Vol 177 (1-2) ◽  
pp. L7-L10 ◽  
Author(s):  
F. Ebrahimi ◽  
B.J.G. De Aragao ◽  
J.R. Castillo-Gomez
Keyword(s):  
Fracture Toughness ◽  
Indentation Technique

scholarly journals Oxidative regulation of the mechanical strength of a C–S bond

2020 ◽  
Vol 11 (38) ◽  
pp. 10444-10448
Author(s):  
Yangju Lin ◽  
Stephen L. Craig
Keyword(s):  
Fracture Toughness ◽  
Mechanical Strength ◽  
Performance Metrics ◽  
Polymer Chains ◽  
Bulk Materials ◽  
Oxidative Regulation ◽  
Individual Polymer

The mechanical strength of individual polymer chains is believed to underlie a number of performance metrics in bulk materials, including adhesion and fracture toughness.

Sign in / Sign up

Export Citation Format

Share Document