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首页> 外文会议>Seminar on New Trends in Research of Energetic Materials >Monitoring of bond-line stresses in case-bonded composite rocket propellants
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Monitoring of bond-line stresses in case-bonded composite rocket propellants

机译：壳结合复合火箭推进剂的结合线应力监测

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In all case-bonded composite rocket propellant (CRP) types and in all case-bonded elastomer-bonded high explosive charges (HEC) so-named bondline stresses occur when the temperature is unequal to the curing temperature, means not equal to the so-named stress free temperature. The stresses or the forces, which act as tensile force on the bondline when temperature is decreased, can cause de-bonding from the case. Further on, the occurring tangential or ring stresses inside the material can lead to cracks inside the material, especially when the strain capability is not sufficient or decreases with ageing. Therefore a method is developed to monitor such stresses. The method enables a prediction-tool for critical loads with respect to failure of the material. Preferably such a method works non-destructively, means the quantities were determined without destruction or firing of the munitions, here rockets and high explosive warheads. In a first step, built-in stress sensors are used to follow the development of stress values during ageing and thermal cycling. The material is a typical composite rocket propellant with elastomeric HTPB-IPDI binder and AP and Al as solid fillers. The experimental set-up consisting of several small rocket motors equipped with stress sensors is explained. Results of the measurements are presented and discussed. Again to say any other elastomer binder with any other solid filler load are composite materials which suffer from these mechanisms outlined.
机译：在所有情况下粘结的复合火箭推进剂（CRP）类型以及在所有情况下粘结的弹性体粘结的高炸药（HEC）中，当温度不等于固化温度时，就会产生所谓的粘结线应力，即不等于固化温度。称为无应力温度。当温度降低时，应力或作用力会在粘合线上起到拉力的作用，这可能会导致外壳脱离。此外，材料内部发生的切向应力或环向应力会导致材料内部产生裂纹，尤其是在应变能力不足或随老化而降低的情况下。因此，开发了一种监测这种应力的方法。该方法使预测工具能够针对与材料失效相关的关键载荷进行预测。优选地，这种方法是非破坏性的，这意味着在不破坏或发射弹药的情况下确定了数量，在此，弹药和高爆弹头没有被破坏。第一步，使用内置应力传感器来跟踪老化和热循环过程中应力值的变化。该材料是一种典型的复合火箭推进剂，具有弹性HTPB-IPDI粘合剂和AP和Al作为固体填料。说明了由几个装有压力传感器的小型火箭发动机组成的实验装置。给出并讨论了测量结果。再说一遍，具有任何其他固体填料负载的任何其他弹性体粘合剂都是复合材料，它们受到上述机理的影响。

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