With these points in mind, the key question is: “How big is the total error compared to the strain I am trying to measure?” There is no clear cut answer but this technique for measuring flexural strain could be used if the overall stiffness of the machine is much greater than the sti...
Below is a breakdown of the two standards mentioned above and how they differ from each other. The ASTM (D3574- Standard Test Methods for Flexible Cellular Materials) guidelines are summarized below: Preflex the sample by pressing the test plate down on the foam until it indents down 75%...
Product Description XHF-01 Automatic Fabric Air Permeability Tester is used to test the air permeability of various woven fabrics, knitted fabrics, non-woven fabrics, industrial filter materials etc. Test Standards ASTM D737, ASTM D3574, AFNORG07-111, BS5636, DIN53,...
所谓“道德消费”(Ethical consumption),是人们在日常消费行为中所体现出来的一种对人类自身的关怀和对整个世界兼顾的下意识举动 At present, in the worldwide scale the moral expense movement more and more is common.So-called “the morals expend” (Ethical consumption), is the people one kind which ...