{"product_id":"strain-rate-sensitivity-of-epoxy-nasa-technical-reports-server-ntrs-9781289145958","title":"Strain Rate Sensitivity of Epoxy Resin in Tensile and Shear Loading","description":"The mechanical response of E-862 and PR-520 resins is investigated in tensile and shear loadings. At both types of loading the resins are tested at strain rates of about 5x10(exp 5), 2, and 450 to 700 \/s. In addition, dynamic shear modulus tests are carried out at various frequencies and temperatures, and tensile stress relaxation tests are conducted at room temperature. The results show that the toughened PR-520 resin can carry higher stresses than the untoughened E-862 resin. Strain rate has a significant effect on the response of both resins. In shear both resins show a ductile response with maximum stress that is increasing with strain rate. In tension a ductile response is observed at low strain rate (approx. 5x10(exp 5) \/s), and brittle response is observed at the medium and high strain rates (2, and 700 \/s). The hydrostatic component of the stress in the tensile tests causes premature failure in the E-862 resin. Localized deformation develops in the PR-520 resin when loaded in shear. An internal state variable constitutive model is proposed for modeling the response of the resins. The model includes a state variable that accounts for the effect of the hydrostatic component of the stress on the deformation.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Nasa Technical Reports Server (Ntrs),Amos Gilat\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 1289145954\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781289145958\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Bibliogov\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 06\/28\/2013\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 44\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.21lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.69h x 7.44w x 0.09d","brand":"Nasa Technical Reports Server (Ntrs)","offers":[{"title":"Paperback","offer_id":47611423326463,"sku":"9781289145958","price":15.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_dfe10429-3225-4aab-beaf-0983469a969c.jpg?v=1764513783","url":"https:\/\/www.whiterainbookhouse.com\/products\/strain-rate-sensitivity-of-epoxy-nasa-technical-reports-server-ntrs-9781289145958","provider":"WR Book House","version":"1.0","type":"link"}