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一、前言民用液化石油气瓶是一件涉及到我国千家万户安全利益的重要产品,但是由于过去缺乏科学的质量控制和检验判废标准,使很多不合格的产品在社会上使用,屡次发生不幸事故。因此,用科学的方法来估计使用寿命和规定判废标准是当前的一项紧迫任务。钢瓶内盛装以丙烷、丁烷为主要成份具有一定压力的液化石油气;石油气对瓶体有一定的腐蚀性,长期使用将使气瓶的壁厚发生不均匀的改变;另外,由于钢瓶上下村头在加工时受拉伸而减薄,也将使瓶体的壁厚变得不均匀;钢瓶的形状比较复杂,在瓶咀、护罩、底座与瓶体联接处以及上下封头接头处将产生一定的应力集中。所以,必须对受内压力作用的钢瓶的应力分布规
I. Introduction Civil LPG cylinders are an important product that involves the security interests of every household in our country. However, due to the lack of scientific quality control and testing and rejecting standards in the past, many unqualified products are used in society and frequently occur Unlucky accident Therefore, it is an urgent task to use a scientific method to estimate the service life and to stipulate the standards for sentence-setting. Cylinders filled with propane, butane as the main component of a certain pressure of liquefied petroleum gas; petroleum gas on the bottle has a certain corrosive, long-term use of the cylinder wall thickness will be unevenly changed; In addition, the cylinder up and down The village head in the processing by the stretch and thinning, the bottle will also make the wall thickness becomes uneven; the shape of the cylinder is more complicated, the bottle Tsui, shield, base and bottle joints and the upper and lower head joints Will have a certain concentration of stress. Therefore, the stress distribution of the cylinders subject to internal pressure must be observed