Found material data sources; Researched the standard storage format of the material; established a materials database that contains the information of most engineering materials and developed the material query module. 确定了材料数据来源,研究了材料的标准存储格式(SSF)后,建立了包含大多数工程材料信息的材料数据库,并开发了系统的材料查询模块。