Analysis of interactions between test methodology and geometrical factors for a safe and risk adjusted dimensioning of the interface of polycarbonate window and separating safeguard

研究目的是分析几何参数对带有聚碳酸酯窗的隔离防护装置安全性的影响。过去已经完成了对不同材料和不同射弹的抗侵彻性的研究，结果可以在相应的标准中查看。测试用例始终是固定在框架上的测试图案，框架应尽可能坚硬，测试图案中间有一个撞击点。该程序已被证明对于确定穿透阻力是有价值的，并且是最先进的。然而，在工业中存在已知的情况，其中由于观察板从其固定装置上松开，因此被弹出的物体不能被观察板保持，使得被弹出的物体和观察板都离开了机器。实际的标准并没有提供安全的解决方案，在研究项目中只进行了随机测试。建筑工程师们依靠自己的经验或昂贵的个案审查。在研究项目的第一阶段，几何参数的影响，导致松动的窗口进行了分析。因此，可以识别重要的参数，量化它们的影响，并且可以建立数学模型，该数学模型允许评估针对特定结构上的窗户的松动的安全性。在第二阶段，研究将扩展到非方形和更大的窗户。最后，将从测试结果中得出施工记录，这使得设计工程师能够评估和增加带有集成窗户的隔离防护装置的安全性，而无需进行逐个冲击测试。

Aim of the research project is to analyze the influences of geometrical parameters on the safety of a separating safeguard with an integrated polycarbonate window.The dimensioning of a machine tool housing nowadays relies on the penetration resistance. Studies on the penetration resistance of different materials and different projectiles have been accomplished in the past and the results can be viewed in the respective standards. The test case was always a test pattern fixed on a frame which should be as stiff as possible with an impact point in the middle of the test pattern. This procedure has proved of value for the determination of the penetration resistance and is state of the art. However, there are known cases in industry in which ejected objects could not be hold by the viewing panel because it loosened from its fixture, so that the ejected object and the viewing panel both left the machine. Actual standards do not provide safe solutions for this case and in research projects only random tests have been made on it. Construction engineers are depending on own experiences or costly case-by-case reviews.In the first period of the research project, the influence of the geometric parameters that lead to a loosening of the window has been analyzed. Thereby, significant parameters could be identified, their influence quantified and a mathematical model, which allows to evaluate the safety against loosening of the window on a certain construction, could be built. In the second period, the research shall be expanded on non-quadratic and larger windows.Finally, there shall be educed construction notes from the test results, which allow design engineers to evaluate and to increase the safety of separating safeguards with integrated window without case-by-case impact tests.