Damage evolution and characterization for sintered powder metals with the varying porosity

被引：14

作者：

Yuan, Huang ^{[1
]}

Zhang, Long ^{[2
]}

Ma, Songyun ^{[3
]}

机构：

[1] Tsinghua Univ, Sch Aerosp Engn, Beijing, Peoples R China

[2] China Acad Space Technol, Beijing, Peoples R China

[3] Rhein Westfal TH Aachen, Inst Gen Mech, Aachen, Germany

来源：

ENGINEERING FRACTURE MECHANICS | 2019年 / 207卷

关键词：

Sintered metals; Varying porosity; Damage evolution; Multi-axial loading; Damage modeling; MECHANICAL-BEHAVIOR; FATIGUE; FRACTURE; STEELS; MODEL; TENSILE;

D O I：

10.1016/j.engfracmech.2018.12.014

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Micro-structure of sintered powder metals is characterized by the high porosity. Experiments confirm that the major mechanical property can be expressed in a power-law function of the porosity. In the present work the interdependence between the porosity and the elastic-plastic mechanical property as well as the damage evolution in sintered metals with varying porosity is investigated experimentally and analytically. A damage characterization is introduced based on the stiffness degradation to predict the inelastic behavior of the sintered material and the damage process. The proposed damage evolution model is further verified under multi-axial loading conditions.

引用

页码：86 / 98

页数：13

共 26 条

[1] Computational applications of a coupled plasticity-damage constitutive model for simulating plain concrete fracture [J].

Abu Al-Rub, Rashid K. ;

Kim, Sun-Myung .

ENGINEERING FRACTURE MECHANICS, 2010, 77 (10) :1577-1603

[2]

[Anonymous], 2005, Engineering Damage Mechanics, DOI DOI 10.1007/B138882

[3]

Beiss P., 2003, Powder Metallurgy Data Part 1: Metal and Magnets

[4]

Beiss P., 2010, PULVERMETALLURGISCHE

[5] Ductile damage evolution under triaxial state of stress: theory and experiments [J].

Bonora, N ;

Gentile, D ;

Pirondi, A ;

Newaz, G .

INTERNATIONAL JOURNAL OF PLASTICITY, 2005, 21 (05) :981-1007

[6] CDM modeling of ductile failure in ferritic steels: Assessment of the geometry transferability of model parameters [J].

Bonora, Nicola ;

Ruggiero, Andrew ;

Esposito, Luca ;

Gentile, Domenico .

INTERNATIONAL JOURNAL OF PLASTICITY, 2006, 22 (11) :2015-2047

[7] Microstructure and mechanical behavior of porous sintered steels [J].

Chawla, N ;

Deng, X .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 390 (1-2) :98-112

[8] A plasticity and anisotropic damage model for plain concrete [J].

Cicekli, Umit ;

Voyiadjis, George Z. ;

Abu Al-Rub, Rashid K. .

INTERNATIONAL JOURNAL OF PLASTICITY, 2007, 23 (10-11) :1874-1900

[9]

German RM, 2014, SINTERING: FROM EMPIRICAL OBSERVATIONS TO SCIENTIFIC PRINCIPLES, P1

[10] Evolution of damage and fracture in two families of Ni-Cu-Mo sinter-hardened steels with various initial porosities [J].

Gilmas, Margaux ;

Chottin, Jerome ;

Dougan, Mark J. ;

Hug, Eric .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 654 :85-93

← 1 2 3 →