دانلود رایگان مقاله لاتین مقاومت کششی ماسه سنگ از سایت الزویر
عنوان فارسی مقاله:
اثر درجه حرارت بالا بر مقاومت کششی ماسه سنگ
عنوان انگلیسی مقاله:
The effect of high temperature on tensile strength of sandstone
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Effect of temperature on the physical and mechanical properties of rock is an important research topic in the field of rock mechanics [1]. In many cases, the rock mass may be affected by high temperature, underground coal gasification [2], underground development of deep mine oil and gas storage cavern [3], burial of highly radioactive nuclear waste [4], development of geothermal resources [5,6] and fire in exploitation of underground rock [7–9]. The physical and mechanical properties of rock will change obviously after high temperature, such as the decrease of strength, elastic modulus and longitudinal wave velocity [10,11]. Those changes may cause irreparable loss if there are no good remedial measures. Therefore, the problem of rock engineering in high temperature environment has become the new development of rock mechanics [4]. Many studies have got certain achievements focusing on physical and mechanical properties of rock under high temperature [1–20]. The tensile strength is a key parameter for determining the rock’s load bearing capacity, deformation, damage, fracturing and crushing, etc., therefore it is used to analyze the stability and serviceability of rock structures [21]. There are many test methods to determine the tensile strength such as Brazilian tensile strength test [22], flatten Brazilian disc [23], semi-circular bending test [24] and ring test [25]. The Brazilian tensile strength test is widely applied to rock engineering because it is easy to conduct, specimens are easy to prepare and uniaxial compression test machines are quite common [21]. Zhao et al. [8] studied the changing trends of density, longitudinal wave velocity and tensile strength of grit stone after high temperature. Su et al. [16] investigated the effect of temperature and sample size on the tensile strength by carrying out the Brazilian tensile strength test at five temperature levels ranging from 20 C to 800 C. Dan and Konietzky [26] carried out a series of Brazilian tests on Mosel slate and simulated the deformation process and failure behavior of the foliated rock samples.
کلمات کلیدی:
