On the Problem of Cracking in 2-Phase Ceramic Matrix Composite Materials
The aim of the paper is to present a theoretical analysis of phenomena occurring in the 2-phase ceramic composite with the gradual degradation of the material properties under the uniaxial tension process. Ceramic composite materials have a nonlinear and
- PDF / 576,914 Bytes
- 12 Pages / 439.37 x 666.142 pts Page_size
- 88 Downloads / 199 Views
Abstract The aim of the paper is to present a theoretical analysis of phenomena occurring in the 2-phase ceramic composite with the gradual degradation of the material properties under the uniaxial tension process. Ceramic composite materials have a nonlinear and complex overall response to applied loads. It is caused by the following factors: existence of an inital porosity, development of limited plasticity, different phases and internal microdefects. These microdefects cause stress concentrations and locally change the state of stress, which results in the development of mesocracks leading to macrocracks. In this contribution, a multiscale approach was applied in modelling of such material response to depict phenomena at micro- mesoand macro-scales. In experiments it was shown that defects developed mainly intergranularly what resulted in inhomogeneity and induced anisotropy of the material.
1 Motivation for Research Permanent innovations of different branches of engineering technologies require application of new multiphase engineering materials with specially designed composition to satisfy limitation of extremal exploitation conditions of critical structural parts in airplanes, cars and buildings etc. The novel materials are different types of composites obtained as mixtures of various phases and further subjected to specific T. Sadowski (B) Department of Solid Mechanics, Lublin University of Technology, Nadbystrzycka 40 Str., Lublin, Poland e-mail: [email protected] L. Marsavina Department Strength of Materials, Politehnica University of Timisoara, Blvd. M. Viteazu, Nr.1, 300222 Timisoara, Romania e-mail: [email protected] E.-M. Craciun Faculty of Mechanical, Industrial and Martime Engineering, Ovidius University of Constanta, Bd. Mamaia 124, 900527 Constanta, Romania e-mail: [email protected] © Springer Science+Business Media Singapore 2016 K. Naumenko and M. Aßmus (eds.), Advanced Methods of Continuum Mechanics for Materials and Structures, Advanced Structured Materials 60, DOI 10.1007/978-981-10-0959-4_20
367
368
T. Sadowski et al.
technological process in the manufacturing, e.g. Gömze and Gömze (2009, 2013). The materials engineering allows for designing of almost arbitrary internal structure of the composites, particularly important for industrial demands. A very important example is functionally graded materials, possessing gradation of the material properties, e.g. Birman and Byrd (2007), Sadowski and Neubrand (2004), Sadowski et al. (2007a, 2009), Nakonieczny and Sadowski (2008, 2009), Bîrsan et al. (2012), Ivanov et al. (2013), Petrova et al. (2012), Petrova and Sadowski (2012), Bîrsan et al. (2013a, b), Burlayenko et al. (2015a, b), Sadowski et al. (2015), Petrova and Sadowski (2014), Taczała et al. (2015, 2016), Sadowski and Pankowski (2016). Other examples are brittle composite materials built on the basis of cement or clay matrix, e.g. Golewski and Sadowski (2014), Golewski et al. (2012), Lenci et al. (2011, 2012), Sadowski et al. (2005). Advanced composites can be built up as a
Data Loading...
