Universal Tester for material characterization

请求提供资金，用于购买MTS Insight 30通用测试仪，该测试仪带有一个额外的10千牛顿测力传感器、一个热室、一个环境浴槽、一个激光引伸计和一个夹规。所要求的设备将使滑铁卢大学的研究人员能够进行全面的跨学科研究，主要研究聚合物的行为，以及建筑和汽车工业中应用的金属。滑铁卢大学对聚合物机械行为的跨学科研究将其化学组成与机械性能联系起来，使我们能够解释聚乙烯分子结构中减缓环境应力开裂ESC的机制。我们最近提出并合理地解释了大应变机械拉伸试验的适用性，用于确定环境应力开裂抗性ESCR。 典型的ESCR测试通过在样品上开槽并使其在500 ℃下经受Igepal溶液来进行。试验耗时长，结果分散性大。我们提出的拉伸试验简单，并且显示出很大的前景（Cheng等人，2008，J. Macr. sci. 45：3599 - 611）。然而，当变形较大时，我们在滑铁卢大学的测试能力是不够的。在环境条件下，只能记录试验机夹具的总位移。 为了在ESCR的这种方法的开发中取得进展，我们确实需要适当的测试能力。所要求的设备的可用性将使我们能够将新提出的ESCR大应变拉伸测试带到工业水平实施，并有可能取代过去25年广泛使用的ASTM技术。设备的选择受到申请人和滑铁卢大学实验室技术人员的实验室测试经验的激励和支持。 该设备与滑铁卢现有的其他设备模块兼容。

Funds are requested for the purchase of the MTS Insight 30 Universal Tester with an extra 10kN load cell, a thermal chamber, an environmental bath, a laser extensometer and a clip gauge. The requested equipment will enable researchers at the University of Waterloo to undertake comprehensive interdisciplinary research primarily on the behaviour of polymers, but also on metals for applications in construction and automotive industries. The interdisciplinary research at Waterloo on the mechanical behaviour of polymers linking their chemical composition with mechanical properties has allowed us to explain the mechanisms in the molecular architecture of polyethylene that slow down the environmental stress cracking ESC. We have recently proposed and rationally explained the applicability of large strain mechanical tensile testing for the determination of environmental stress crack resistance ESCR. Typical ESCR tests are done by notching and subjecting the samples to an Igepal solution at 500C . The test is time consuming and the scatter of the results is large. Our proposed tensile test is simple and shows great promise (Cheng et al. 2008, J. Macr. Sci. 45:3 599-611). However, our testing capability at the University of Waterloo is inadequate when deformations are large. Only overall displacement of the grips of the tester, under ambient conditions, can be recorded. In order to make progress in the development of this method for ESCR we do need appropriate testing capabilities. The availability of the requested equipment will allow us to bring the newly proposed large-strain tensile test for ESCR to the industrial level implementation, and potentially replace the widely used ASTM technique of the last 25 years. The selection of the equipment is motivated and supported by the laboratory testing experience of the applicants and of the technical staff in the University of Waterloo Laboratories. This equipment is compatible with other equipment modules already available at Waterloo.