加载速率对塑性和脆性材料强度的影响  

Analysis of the Influence of Loading Rate on the Strength of Plastic and Brittle Materials

作　　者：董继蕾 缪广红 吴杨勇 DONG Jiei;MIAO Guanghong;WU Yangyong(College of Mechanics and Optoelectronics Physics,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学力学与光电物理学院,安徽淮南232001

出　　处：《牡丹江师范学院学报（自然科学版）》2024年第3期16-19,共4页Journal of Mudanjiang Normal University：Natural Sciences Edition

基　　金：国家自然科学基金项目(119002002);2021年度安徽省高等学校省级质量工程项目(2021xxkc033);安徽省级研究生线下示范课程(2022xxsfkc023)。

摘　　要：研究加载速率对塑性材料和脆性材料断裂性能的影响.采用多种非线性拟合方式,拟合加载速率和材料强度之间的关系.拟合结果表明:六阶非线性拟合图最能反映加载速率与抗拉强度的关系;塑性材料抗拉强度在拉伸速率较小时增长速率较快,当达到某临界值时,该曲线逐渐接近水平线,脆性材料的抗拉强度随拉伸速率的增大而减小,当达到某临界值时,抗拉强度保持在稳定值范围内.Study the effect of loading rate on the fracture performance of plastic and brittle materials through tensile tests.Using multiple nonlinear fitting methods to fit the relationship between loading rate and material strength.The fitting results indicate that the sixth order nonlinear fitting graph best reflects the relationship between loading rate and tensile strength;The tensile strength of plastic materials increases rapidly when the tensile rate is low.When reaching a certain critical value,the curve gradually approaches the horizontal line.The tensile strength of brittle materials decreases with the increase of tensile rate.When reaching a certain critical value,the tensile strength remains within a stable range.

关 键 词：塑性材料 脆性材料 抗拉强度 拉伸速率 

分 类 号：TB31[一般工业技术—材料科学与工程]