Stress-Strain Curve

{
  "data": [
    { "type":"scatter","mode":"lines","name":"σ-ε",
      "x":[0,0.001,0.002,0.005,0.01,0.02,0.05,0.1,0.18,0.22],
      "y":[0,200,400,420,460,500,540,560,540,500],
      "line":{"color":"#3666ff","width":3} }
  ],
  "layout": {
    "title": "Engineering stress-strain — mild steel",
    "xaxis": { "title": "Strain ε" },
    "yaxis": { "title": "Stress σ (MPa)" },
    "annotations":[
      {"x":0.002,"y":400,"text":"Yield σ_y","showarrow":true,"arrowhead":3,"ax":-40,"ay":-30},
      {"x":0.1,"y":560,"text":"Ultimate σ_u","showarrow":true,"arrowhead":3,"ax":-50,"ay":-20},
      {"x":0.22,"y":500,"text":"Fracture","showarrow":true,"arrowhead":3,"ax":40,"ay":-20}
    ]
  }
}