Enhancing the performance of the T-peel test for thin and flexible adhered laminates.
Enhancing the performance of the T-peel test for thin and flexible adhered laminates.
复制标题
增强薄且柔性粘合层压板的 T 型剥离测试性能。
DOI：
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发表时间：
2015
影响因子：
1.6
通讯作者：
B. Trout
中科院分区：
文献类型：
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作者：
N. Padhye;D. Parks;A. Slocum;B. Trout
对称粘结的薄且柔性的T型剥离试样在垂直移动机器上进行测试时，可能会受到显著的重力载荷，剥离过程中会出现相关的不对称和混合模式失效。这可能导致错误地记录高实验剥离力，从而导致估计界面断裂韧性和失效模式的不确定性。为了克服这些问题，已经设计了一种机械测试夹具，用于垂直测试机，其支撑测试样本的未剥离部分并抑制由于重力引起的寄生负载影响剥离测试。该机构由试验机十字头驱动，以十字头速度的一半移动，使得未剥皮部分始终位于瞬时运动中心的平面内。几个样本，如粘合聚合物薄膜，层压板，和商业磁带进行了测试，没有夹具，和建议的T-剥离程序的重要性已被证明。
Symmetrically bonded thin and flexible T-peel specimens, when tested on vertical travel machines, can be subject to significant gravitational loading, with the associated asymmetry and mixed-mode failure during peeling. This can cause erroneously high experimental peel forces to be recorded which leads to uncertainty in estimating interfacial fracture toughness and failure mode. To overcome these issues, a mechanical test fixture has been designed, for use with vertical test machines, that supports the unpeeled portion of the test specimen and suppresses parasitic loads due to gravity from affecting the peel test. The mechanism, driven by the test machine cross-head, moves at one-half of the velocity of the cross-head such that the unpeeled portion always lies in the plane of the instantaneous center of motion. Several specimens such as bonded polymeric films, laminates, and commercial tapes were tested with and without the fixture, and the importance of the proposed T-peel procedure has been demonstrated.