Abstract
Tensile creep tests were carried out on polymethyl methacrylate, by use of the authors' creep testing machine for plastic materials.
Results obtained are represented as strain (ε)/time (t) curves or the so-called creep curves, with an experimental formula, i. e.,
ε=ε0+Atn where A and n are respectively the material constant dependent of the test temperature and the applied stress.
Some rheological considerations are taken on the result and the influence of test conditions upon creep properties of the test specimen are also discussed.
