INSTRON 8501 DIGITAL SERVOHYDRAULIC TESTING INSTRUMENT

机械试验机在评估 生物材料我们现有的Instron TTM万能试验机是 它于1959年购买，一直是我们机械测试的支柱 生物材料。这款车型最后一次生产是在1974年， Instron公司（见附录A）建议， 不再可用（例如，放大器、离合器、真空管等），和 可能无法修复。最先进的机械测试仪是 伺服液压驱动，数字输出，计算机 受控，加上双轴和单轴载荷。一种机械测试仪， 这种类型是必不可少的，在评估机械性能， 复合材料、牙本质替代物、颌面材料、陶瓷， 咀嚼研究，以及骨水泥和植入物与 骨头单轴力这种仪器在单轴力作用下测试材料的能力 双轴加载是今后评价和发展的必要条件 尤其是植入材料。我们建议的Instron 购买将有足够的负载和位移范围与计算机 受控伺服液压双轴加载和专用夹具， 脆性材料（陶瓷）。我们还建议购买一台x-y记录仪 和一台HP 7090 A计算机来完成包装（注：Instron不 提供这两个项目）。

A mechanical testing machine is essential in the evaluation of biomaterials. Our present Instron TTM Universal Testing Machine was purchased in 1959 and it has been the backbone of our mechanical testing of biomaterials. This model was last produced in 1974 and we have been advised by the Instron Corporation (see Appendix A) that a number of parts are no longer available (e.g. amplidyne, clutch, vacuum tubes, etc.), and repairs may not be possible. State-of-the-art mechanical testers are servohydraulicly driven and have digital output and are computer controlled, plus have biaxial and uniaxial loading. A mechanical tester of this type is essential in evaluating the mechanical properties of composites, substitutes for dentin, maxillofacial materials, ceramics, chewing studies, and strengths of attachment of cements and implants to bone. The ability of such an instrument to test materials under uniaxial and biaxial loading is essential in the future evaluation and development of many and especially implant materials. The Instron we are proposing to purchase will have adequate loading and displacement ranges with computer controlled servohydraulic biaxial loading and special clamping fixtures for brittle materials (ceramics). We also propose purchasing an x-y recorder and an HP 7090A computer to complete the package (note: Instron does not supply these two items).