Results 31 to 40 of about 57,772 (300)

Damage Characteristics of Surrounding Rock Subjected to VCR Mining Blasting Shock

Shock and Vibration, 2015
For limiting the damage range caused by explosive shock loads in vertical crater retreat (VCR) mining, the blasting damage characteristics of surrounding rock were studied by two methods: numerical simulation and ultrasonic testing.
Nan Jiang, Chuanbo Zhou, Xuedong Luo, Shiwei Lu   +3 more
doaj   +1 more source

On structural computations until fracture based on an anisotropic and unilateral damage theory [PDF]

International Journal of Damage Mechanics, 2013
This paper describes the formulation and numerical implementation of a family of anisotropic and unilateral damage models for the prediction of damage and final rupture in engineering structures. The damage can be load oriented, microstructure oriented, or (for the first time within this modeling framework) softening.
Genet, Martin, Marcin, Lionel, Ladevèze, Pierre   +2 more
openaire   +1 more source

Grain kernel damage during threshing: a comprehensive review of theories and models

Journal of Agricultural Engineering
Grain threshing is aimed at separating the grain from the inedible chaff. However, mechanical forces often damage grains, impacting their quality, market value, and germination ability. This comprehensive review examines theories and models developed to
George Ashwehmbom Looh, Fangping Xie, Xiushan Wang, Augustine Ngiejungbwen Looh, Hamdaoui Hind   +4 more
doaj   +1 more source

Concrete damage analysis based on higher-order beam theories using fracture energy regularization

Mechanics of Advanced Materials and Structures, 2022
This paper presents the numerical damage analysis of concrete structures using higher-order beam theories based on Carrera Unified Formulation (CUF). The concrete constitutive relation is modeled using continuum damage mechanics based on a modified Mazars concrete damage model, in which both the tensile and compressive softening behaviors are ...
Shen, J., Arruda, M. R. T, Pagani, A.
openaire   +3 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

From bonds to breaks: multiscale perspectives on polymer network fracture

International Journal of Smart and Nano Materials
Fracture in polymer networks arises from complex, multiscale phenomena spanning molecular bond rupture to macroscopic crack propagation. This review summarizes recent theoretical and computational advances that deepen our understanding of polymer network
Zihan Tang, Weikang Xian, Jianxin He, Rong Long, Ying Li   +4 more
doaj   +1 more source

Second law of thermodynamics and the failure of rock materials [PDF]

, 2001
The relation of nonequilibrium thermodynamics to some failure and fracture theories of rock mechanics is investigated. The basic concepts are given to connect failure to the properties of material equations describing the elastic properties.
Ván, Péter, Vásárhelyi, Balázs
core  

Rock damage evolution model of pulsating fracturing based on energy evolution theory [PDF]

Energy Science & Engineering, 2019
AbstractPulsating fracturing, as a new technology for unconventional oil and gas exploration, enables to enhance stimulated reservoir volume (SRV) effectively, which further helps to improve well performance. It is of great importance for the evaluation of fracturing performance and optimization of fracturing parameters by accurately calculating ...
Yuwei Li, Yudong Zhao, Jizhou Tang, Liyuan Zhang, Yuyang Zhou, Xiuyu Zhu, Dan Jia, Mian Chen   +7 more
openaire   +2 more sources

Network divergence analysis identifies adaptive gene modules and two orthogonal vulnerability axes in pancreatic cancer

Molecular Oncology, EarlyView.
Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson, Lyanne Delgado‐Coka, Natalia Marchenko, Luisa F. Escobar‐Hoyos, Kenneth R. Shroyer, Alisa Yurovsky, Trey Ideker, Gábor Balázsi, Thomas MacCarthy, Scott Powers   +9 more
wiley   +1 more source

Size effects in statistical fracture

, 2009
We review statistical theories and numerical methods employed to consider the sample size dependence of the failure strength distribution of disordered materials.
Bazant Z P, Chakrabarti B K, da Vinci L, de Arcangelis L, Freudenthal A M, Gumbel E J, Mikko J Alava, Mosolov A B, Phani K V V Nukala, Pierce F T, Stefano Zapperi, van Mier J G M, Weibull W   +12 more
core   +1 more source