Development of expert-friendly system for the evaluation of damage and strength of structures

1.一种新的专家友好系统算法的开发为了有效地实现专家友好，我们开发了一种新的算法。专家系统通常由若干独立的程序模块组成，它们必须易于连接，以便进行交互分析。通过在MS-DOS系统中引入子进程，解决了上述问题。最后，我们可以将疲劳强度评估系统、热冲击问题评估系统和可靠性分析评估系统联合收割机结合起来.钢管失稳韧性断裂评定专家系统的研制用正常弹塑性断裂评定结果的物理意义难以理解。在本研究中，已开发的系统来评估的韧性断裂的稳定条件的限制，通过使用的载荷-位移曲线与裂纹尺寸，J积分值。最后，将热应力评价系统与这些系统相结合，对热冲击现象有了更好的认识.疲劳强度评估专家系统的开发首先，将日本材料科学学会提供的在日本广泛流行的疲劳数据安装在外围数据库系统DBASE III上。接下来，通过使用原则1.，用FORTRAN语言编写的主程序与数据库系统相结合，完成了疲劳强度评估专家友好型评估系统.可靠性分析专家系统的开发通过将可靠性分析系统添加到上述系统中，完成了完全专家友好的系统。通过该系统，可以方便地进行可靠性分析，给出统计繁荣的载荷和疲劳强度数据，从数据库系统中提取。相反，可以确定载荷和强度数据分散的容许边界，以满足任意的可靠性水平。

1. Development of a new algorithm for the expert-friendly systemTo make a expert-friendly effectively, we have developed a new algorithm. Normally, expert system consists of several independent program modules and they must be linked easily for the interctive analysis. Using a child process in MS-DOS system, we have solved those problems. Finally we can combine a estimation system for fatigue strength, one for thermal shock problems and one for reliability analysis.2. Development of a expert system of the evaluation for the unstable ductile fracture of pipesIt is hard to understand the physical meaning of the result by using the normal elastic-plastic fracture. In the present research, the system to evaluate the limitation of stable condition in ductile fracture has been developed by using the load-displacement curve together with the flaw size, J integral values. Finally, evaluation system for thermal stresses is combined to those system and we get to understand the thermal shock phenomena well.3. Development of a expert system for the evaluation of the fatigue strengthFirst, the fatigue data, which is provided from the Society of Materials Science, Japan and is widely prevailed in Japan, was installed on the peripheral database system DBASE III. Next, by using the principle 1., a main program written in FORTRAN language is combined to the database system and the expert-friendly evaluation system for the fatigue strength evaluation can be completed.4. Development of a expert system for the reliability analysisTotal expert-friendly system was completed by adding the reliability analysis system to the above system. By the system, the reliability analysis can be executed easily by giving the statistical prosperity of the load and the fatigue strength data which is extracted from the database system. On the contrary, the tolerable boundary of the scatter of both the load and the strength data can be decided so as to satisfy the arbitrary reliability level.