全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
工程力学  2013 

基于能量的弹塑性损伤实用本构模型

DOI: 10.6052/j.issn.1000-4750.2012.01.0034, PP. 172-180

Keywords: 弹性Helmholtz自由能,混凝土,本构模型,损伤力学,损伤能量释放率

Full-Text   Cite this paper   Add to My Lib

Abstract:

建立一个实用的弹塑性损伤本构模型。在有效应力空间采用经验公式计算塑性变形,能将模型塑性部分与损伤部分解耦,降低模型的数值处理复杂性,同时大大简化模型塑性应变的计算。结合不可逆热力学理论,基于损伤能量释放率建立损伤准则,损伤能量释放率由修正后的弹性Helmholtz自由能导出,模型中将弹性Helmholtz自由能分解为应力球量部分和应力偏量部分,将其应力球量部分产生的损伤取为零,同时根据应力状态引入折减系数对其应力偏量部分进行修正,使得模型能较为准确的模拟混凝土材料在双轴加载下的本构行为。将应力张量谱分解为正、负两部分以分别定义材料受拉、受压损伤演化,并采用受拉损伤变量、受压损伤变量分别模拟混凝土材料在拉、压加载下的本构特性。引入一个加权损伤变量使得模型能较准确的反映混凝土材料的?拉-压软化效应?。最后该文给出初步试验验证,证明了该文模型的有效性。

References

[1]  Voyiadjis G Z, Taqieddin Z N. Elastic plastic and damage model for concrete materials: Part I - theoretical formulation [J]. International Journal of Structural Changes in Solids-Mechanics and Applications, 2009,1(1):31―59.
[2]  Júnior F S, Venturini W S. Damage modelling of reinforced concrete beams [J]. Advances in Engineering Software, 2007,38(8/9):538―546.
[3]  Khan A R, Al-Gadhib A H, Baluch M H. Elasto-damage model for high strength concrete subjected to multiaxial loading [J]. International Journal of Damage Mechanics, 2007,16(3):361―398.
[4]  Labadi Y, Hannachi N E. Numerical simulation of brittle damage in concrete [J]. Strength of Materials, 2005,37(3):268―281.
[5]  Grassl P, Lundgren K, Gylltoft K. Concrete in compression: a plasticity theory with a novel hardening law [J]. International Journal of Solids and Structures, 2002,39:5205―5223.
[6]  Park H, Kim J Y. Plasticity model using multiple failure criteria for concrete in compression [J]. International Journal of Solids and Structures, 2005,42(8):2303―2322.
[7]  Saritas A, Filippou F C. Numerical integration of a class of 3d plastic-damage concrete models condensation of 3d stress-strain relations for use in beam finite elements [J]. Engineering Structures, 2009,31:2327―2336.
[8]  (杜荣强),(林皋). 混凝土弹塑性多轴损伤模型及其应用[J]. (大连理工大学学报), 2007,47(4):567―572. Du Rongqiang, Lin Gao. Multiaxial anisotropic elastoplastic model for concrete and its application [J]. Journal of Dalian University of Technology,2007,47(4): 567―572. (in Chinese)
[9]  Faria R, Oliver J, Cervera M. A strain-based plastic viscous-damagemodel for massive concrete structures [J]. International Journal of Solids and Structures, 1998,35(14):1533―1558.
[10]  (李杰),(吴建营). 混凝土弹塑性损伤本构模型研究I: 基本公式[J]. (土木工程学报), 2005,38(9):14―20. Li Jie, Wu Jianying. Elastoplastic Damage Constitutive model for concrete based on damage energy release rates, part I: Basic formulations [J]. China Civil Engineering Journal,2005,38(9): 14―20. (in Chinese)
[11]  Tao X Y, Phillips D V. A simplified isotropic damage model for concrete under bi-axial stress states [J]. Cement and Concrete Composites, 2005,27(6):716―726.
[12]  Wu J Y, Li J, Faria R. An energy release rate-based plastic damage model for concrete [J]. International Journal of Solids and Structures, 2006,43(3/4):583―612.
[13]  Taqieddin Z N, Voyiadjis G Z. Elastic plastic and damage model for concrete materials: Part II - implementation and application to concrete and reinforced concrete [J]. Journal of Structural Changes in Solids-Mechanics and Applications, 2009,1(1):187―209.
[14]  (吴建营). 基于损伤能释放率的混凝土弹塑性损伤本构模型及其在结构非线性分析中的应用[D]. 上海: 同济大学,2004.
[15]  Wu Jianying. Damage energy release rate-based elastoplastic damage constitutive model for concrete and its application to nonlinear analysis of structures [D]. Shanghai: Tongji University,2004.(in Chinese)
[16]  Kupfer H B, Hildorf H K, Rusch H. Behavior of concrete under biaxial stresses [J]. ACI Journal, 1969,6(8):656―666.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133